Abstract

We proposed a flexible and mask-less approach to directly fabricate a patterned red phosphor layer on a Y3Al5O12:Ce3+ (YAG:Ce3+) phosphor-in-glass (PiG) for high-power white light-emitting diodes (WLEDs). This approach was realized by ultraviolet (UV) assisted and initiative cooling based water condensing. A low-temperature precursor glass matrix with a high refractive index was synthesized for the YAG:Ce3+ PiG. By controlling the UV pre-curing time, the micro-concaves with adjustable sizes were fabricated on the red phosphor layer embedded with UV-curable polymer. With the pre-curing time of 20 s, 30 s, and 40 s, the average aspect ratio of the micro-concave is 1.03, 0.76, and 0.41, respectively. Consequently, the patterned sample achieves a highest luminous efficacy (LE) of 108.5 lm/W at the current of 350 mA, which is 16.2% higher than the unpatterned sample. The corresponding correlated color temperature (CCT) and color rendering index (CRI) are 4831 K and 80.5, respectively. The results demonstrate that the YAG:Ce3+ PiG coated with the water condensing patterned red phosphor layer is a feasible and effective method to enhance the light extraction and color quality of high-power WLEDs.

© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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2018 (2)

X. Xu, H. Li, Y. Zhuo, R. Li, P. Tian, D. Xiong, and M. Chen, “High refractive index coating of phosphor-in-glass for enhanced light extraction efficiency of white LEDs,” J. Mater. Sci. 53(2), 1335–1345 (2018).
[Crossref]

Y. H. Kim, N. S. M. Viswanath, S. Unithrattil, H. J. Kim, and W. B. Im, “Review—Phosphor plates for high-power LED applications: challenges and opportunities toward perfect lighting,” ECS J. Solid State Sci. Technol. 7(1), R3134–R3147 (2018).
[Crossref]

2017 (8)

Y. Peng, R. Li, S. Wang, Z. Chen, L. Nie, and M. Chen, “Luminous properties and thermal reliability of screen-printed phosphor-in-glass-based white light-emitting diodes,” IEEE T. Electron Dev. 64(3), 1114–1119 (2017).
[Crossref]

R. Liang, F. Wu, S. Wang, Q. Chen, J. Dai, and C. Chen, “Enhanced optical and thermal performance of eutectic flip-chip ultraviolet light-emitting diodes via AlN-doped-silicone encapsulant,” IEEE T. Electron Dev. 64(2), 467–471 (2017).
[Crossref]

Y. Peng, R. Li, H. Cheng, Z. Chen, H. Li, and M. Chen, “Facile preparation of patterned phosphor-in-glass with excellent luminous properties through screen-printing for high-power white light-emitting diodes,” J. Alloys Compd. 693, 279–284 (2017).
[Crossref]

X. Zhang, J. Yu, J. Wang, B. Lei, Y. Liu, Y. Cho, R.-J. Xie, H.-W. Zhang, Y. Li, Z. Tian, Y. Li, and Q. Su, “All-inorganic light convertor based on phosphor-in-glass engineering for next-generation modular high-brightness white LEDs/LDs,” ACS Photonics 4(4), 986–995 (2017).
[Crossref]

Y. Ma, R. Hu, X. Yu, W. Shu, and X. Luo, “A modified bidirectional thermal resistance model for junction and phosphor temperature estimation in phosphor-converted light-emitting diodes,” Int. J. Heat Mass Transfer 106, 1–6 (2017).
[Crossref]

Y. Peng, X. Guo, R. Liang, Y. Mou, H. Cheng, M. Chen, and S. Liu, “Fabrication of microlens arrays with controlled curvature by micromolding water condensing based porous films for deep ultraviolet LEDs,” ACS Photonics 4(10), 2479–2485 (2017).
[Crossref]

Y. H. Kim, P. Arunkumar, B. Y. Kim, S. Unithrattil, E. Kim, S.-H. Moon, J. Y. Hyun, K. H. Kim, D. Lee, J.-S. Lee, and W. B. Im, “A zero-thermal-quenching phosphor,” Nat. Mater. 16(5), 543–550 (2017).
[Crossref] [PubMed]

Y. Peng, X. Guo, R. Li, H. Cheng, and M. Chen, “Thermally stable WLEDs with excellent luminous properties by screen-printing a patterned phosphor glass layer on a microstructured glass plate,” Appl. Opt. 56(12), 3270–3276 (2017).
[Crossref] [PubMed]

2016 (5)

2015 (4)

H. Jung and K.-H. Jeong, “Monolithic polymer microlens arrays with high numerical aperture and high packing density,” ACS Appl. Mater. Interfaces 7(4), 2160–2165 (2015).
[Crossref] [PubMed]

B. Bao, J. Jiang, F. Li, P. Zhang, S. Chen, Q. Yang, S. Wang, B. Su, L. Jiang, and Y. Song, “Fabrication of patterned concave microstructures by inkjet imprinting,” Adv. Funct. Mater. 25(22), 3286–3294 (2015).
[Crossref]

Z. Lin, H. Lin, J. Xu, F. Huang, H. Chen, B. Wang, and Y. Wang, “Highly thermal-stable warm w-LED based on Ce:YAG PiG stacked with a red phosphor layer,” J. Alloys Compd. 649, 661–665 (2015).
[Crossref]

L.-Y. Chen, J.-K. Chang, W.-C. Cheng, J.-C. Huang, Y.-C. Huang, and W.-H. Cheng, “Chromaticity tailorable glass-based phosphor-converted white light-emitting diodes with high color rendering index,” Opt. Express 23(15), A1024–A1029 (2015).
[Crossref] [PubMed]

2014 (4)

L.-Y. Chen, W.-C. Cheng, C.-C. Tsai, J.-K. Chang, Y.-C. Huang, J.-C. Huang, and W.-H. Cheng, “Novel broadband glass phosphors for high CRI WLEDs,” Opt. Express 22(S3Suppl 3), A671–A678 (2014).
[Crossref] [PubMed]

Y. K. Lee, Y. H. Kim, J. Heo, W. B. Im, and W. J. Chung, “Control of chromaticity by phosphor in glasses with low temperature sintered silicate glasses for LED applications,” Opt. Lett. 39(14), 4084–4087 (2014).
[Crossref] [PubMed]

M. Kuang, L. Wang, and Y. Song, “Controllable printing droplets for high-resolution patterns,” Adv. Mater. 26(40), 6950–6958 (2014).
[Crossref] [PubMed]

R. Zhang, H. Lin, Y. Yu, D. Chen, J. Xu, and Y. Wang, “A new-generation color converter for high-power white LED: transparent Ce3+:YAG phosphor-in-glass,” Laser Photonics Rev. 8(1), 158–164 (2014).
[Crossref]

2013 (3)

2012 (1)

2011 (2)

M. Ma, F. W. Mont, X. Yan, J. Cho, E. F. Schubert, G. B. Kim, and C. Sone, “Effects of the refractive index of the encapsulant on the light-extraction efficiency of light-emitting diodes,” Opt. Express 19(S5), A1135–A1140 (2011).
[Crossref] [PubMed]

X.-H. Li, R. Song, Y.-K. Ee, P. Kumnorkaew, J. F. Gilchrist, and N. Tansu, “Light extraction efficiency and radiation patterns of III-nitride light-emitting diodes with colloidal microlens arrays with various aspect ratios,” IEEE Photonics J. 3(3), 489–499 (2011).
[Crossref]

2010 (1)

H.-T. Hsieh and G.-D. J. Su, “A novel boundary-confined method for high numerical aperture microlens array fabrication,” J. Micromech. Microeng. 20(3), 035023 (2010).
[Crossref]

2009 (1)

2008 (1)

S. C. Allen and A. J. Steckl, “A nearly ideal phosphor-converted white light-emitting diode,” Appl. Phys. Lett. 92(14), 143309 (2008).
[Crossref]

2005 (1)

E. F. Schubert and J. K. Kim, “Solid-state light sources getting smart,” Science 308(5726), 1274–1278 (2005).
[Crossref] [PubMed]

Allen, S. C.

S. C. Allen and A. J. Steckl, “A nearly ideal phosphor-converted white light-emitting diode,” Appl. Phys. Lett. 92(14), 143309 (2008).
[Crossref]

Arif, R. A.

Arunkumar, P.

Y. H. Kim, P. Arunkumar, B. Y. Kim, S. Unithrattil, E. Kim, S.-H. Moon, J. Y. Hyun, K. H. Kim, D. Lee, J.-S. Lee, and W. B. Im, “A zero-thermal-quenching phosphor,” Nat. Mater. 16(5), 543–550 (2017).
[Crossref] [PubMed]

Bao, B.

B. Bao, J. Jiang, F. Li, P. Zhang, S. Chen, Q. Yang, S. Wang, B. Su, L. Jiang, and Y. Song, “Fabrication of patterned concave microstructures by inkjet imprinting,” Adv. Funct. Mater. 25(22), 3286–3294 (2015).
[Crossref]

Bian, H.

J. Yong, F. Chen, Q. Yang, G. Du, H. Bian, D. Zhang, J. Si, F. Yun, and X. Hou, “Rapid fabrication of large-area concave microlens arrays on PDMS by a femtosecond laser,” ACS Appl. Mater. Interfaces 5(19), 9382–9385 (2013).
[Crossref] [PubMed]

Chang, J.-K.

Chen, C.

R. Liang, F. Wu, S. Wang, Q. Chen, J. Dai, and C. Chen, “Enhanced optical and thermal performance of eutectic flip-chip ultraviolet light-emitting diodes via AlN-doped-silicone encapsulant,” IEEE T. Electron Dev. 64(2), 467–471 (2017).
[Crossref]

Chen, D.

R. Zhang, H. Lin, Y. Yu, D. Chen, J. Xu, and Y. Wang, “A new-generation color converter for high-power white LED: transparent Ce3+:YAG phosphor-in-glass,” Laser Photonics Rev. 8(1), 158–164 (2014).
[Crossref]

Chen, F.

J. Yong, F. Chen, Q. Yang, G. Du, H. Bian, D. Zhang, J. Si, F. Yun, and X. Hou, “Rapid fabrication of large-area concave microlens arrays on PDMS by a femtosecond laser,” ACS Appl. Mater. Interfaces 5(19), 9382–9385 (2013).
[Crossref] [PubMed]

Chen, H.

Z. Lin, H. Lin, J. Xu, F. Huang, H. Chen, B. Wang, and Y. Wang, “Highly thermal-stable warm w-LED based on Ce:YAG PiG stacked with a red phosphor layer,” J. Alloys Compd. 649, 661–665 (2015).
[Crossref]

Chen, L.-Y.

Chen, M.

X. Xu, H. Li, Y. Zhuo, R. Li, P. Tian, D. Xiong, and M. Chen, “High refractive index coating of phosphor-in-glass for enhanced light extraction efficiency of white LEDs,” J. Mater. Sci. 53(2), 1335–1345 (2018).
[Crossref]

Y. Peng, X. Guo, R. Liang, Y. Mou, H. Cheng, M. Chen, and S. Liu, “Fabrication of microlens arrays with controlled curvature by micromolding water condensing based porous films for deep ultraviolet LEDs,” ACS Photonics 4(10), 2479–2485 (2017).
[Crossref]

Y. Peng, R. Li, H. Cheng, Z. Chen, H. Li, and M. Chen, “Facile preparation of patterned phosphor-in-glass with excellent luminous properties through screen-printing for high-power white light-emitting diodes,” J. Alloys Compd. 693, 279–284 (2017).
[Crossref]

Y. Peng, X. Guo, R. Li, H. Cheng, and M. Chen, “Thermally stable WLEDs with excellent luminous properties by screen-printing a patterned phosphor glass layer on a microstructured glass plate,” Appl. Opt. 56(12), 3270–3276 (2017).
[Crossref] [PubMed]

Y. Peng, R. Li, S. Wang, Z. Chen, L. Nie, and M. Chen, “Luminous properties and thermal reliability of screen-printed phosphor-in-glass-based white light-emitting diodes,” IEEE T. Electron Dev. 64(3), 1114–1119 (2017).
[Crossref]

Y. Peng, S. Wang, R. Li, H. Li, H. Cheng, M. Chen, and S. Liu, “Luminous efficacy enhancement of ultraviolet-excited white light-emitting diodes through multilayered phosphor-in-glass,” Appl. Opt. 55(18), 4933–4938 (2016).
[Crossref] [PubMed]

Y. Peng, R. Li, X. Guo, H. Zheng, and M. Chen, “Optical performance improvement of phosphor-in-glass based white light-emitting diodes through optimized packaging structure,” Appl. Opt. 55(29), 8189–8195 (2016).
[Crossref] [PubMed]

L. Yang, M. Chen, Z. Lv, S. Wang, X. Liu, and S. Liu, “Preparation of a YAG:Ce phosphor glass by screen-printing technology and its application in LED packaging,” Opt. Lett. 38(13), 2240–2243 (2013).
[Crossref] [PubMed]

Chen, Q.

R. Liang, F. Wu, S. Wang, Q. Chen, J. Dai, and C. Chen, “Enhanced optical and thermal performance of eutectic flip-chip ultraviolet light-emitting diodes via AlN-doped-silicone encapsulant,” IEEE T. Electron Dev. 64(2), 467–471 (2017).
[Crossref]

Chen, S.

B. Bao, J. Jiang, F. Li, P. Zhang, S. Chen, Q. Yang, S. Wang, B. Su, L. Jiang, and Y. Song, “Fabrication of patterned concave microstructures by inkjet imprinting,” Adv. Funct. Mater. 25(22), 3286–3294 (2015).
[Crossref]

Chen, Z.

Y. Peng, R. Li, S. Wang, Z. Chen, L. Nie, and M. Chen, “Luminous properties and thermal reliability of screen-printed phosphor-in-glass-based white light-emitting diodes,” IEEE T. Electron Dev. 64(3), 1114–1119 (2017).
[Crossref]

Y. Peng, R. Li, H. Cheng, Z. Chen, H. Li, and M. Chen, “Facile preparation of patterned phosphor-in-glass with excellent luminous properties through screen-printing for high-power white light-emitting diodes,” J. Alloys Compd. 693, 279–284 (2017).
[Crossref]

Cheng, H.

Y. Peng, R. Li, H. Cheng, Z. Chen, H. Li, and M. Chen, “Facile preparation of patterned phosphor-in-glass with excellent luminous properties through screen-printing for high-power white light-emitting diodes,” J. Alloys Compd. 693, 279–284 (2017).
[Crossref]

Y. Peng, X. Guo, R. Li, H. Cheng, and M. Chen, “Thermally stable WLEDs with excellent luminous properties by screen-printing a patterned phosphor glass layer on a microstructured glass plate,” Appl. Opt. 56(12), 3270–3276 (2017).
[Crossref] [PubMed]

Y. Peng, X. Guo, R. Liang, Y. Mou, H. Cheng, M. Chen, and S. Liu, “Fabrication of microlens arrays with controlled curvature by micromolding water condensing based porous films for deep ultraviolet LEDs,” ACS Photonics 4(10), 2479–2485 (2017).
[Crossref]

Y. Peng, S. Wang, R. Li, H. Li, H. Cheng, M. Chen, and S. Liu, “Luminous efficacy enhancement of ultraviolet-excited white light-emitting diodes through multilayered phosphor-in-glass,” Appl. Opt. 55(18), 4933–4938 (2016).
[Crossref] [PubMed]

Cheng, W.-C.

Cheng, W.-H.

Cho, J.

Cho, Y.

X. Zhang, J. Yu, J. Wang, B. Lei, Y. Liu, Y. Cho, R.-J. Xie, H.-W. Zhang, Y. Li, Z. Tian, Y. Li, and Q. Su, “All-inorganic light convertor based on phosphor-in-glass engineering for next-generation modular high-brightness white LEDs/LDs,” ACS Photonics 4(4), 986–995 (2017).
[Crossref]

Cho, Y. S.

J. S. Kim, S. K. Eswaran, O. H. Kwon, S. J. Han, J. H. Lee, and Y. S. Cho, “White-light-emitting diodes: enhanced luminescence characteristics of remote yellow silicate phosphors printed on nanoscale surface-roughened glass substrates for white light-emitting diodes,” Adv. Opt. Mater. 4(7), 976 (2016).
[Crossref]

Chung, W. J.

Dai, J.

R. Liang, F. Wu, S. Wang, Q. Chen, J. Dai, and C. Chen, “Enhanced optical and thermal performance of eutectic flip-chip ultraviolet light-emitting diodes via AlN-doped-silicone encapsulant,” IEEE T. Electron Dev. 64(2), 467–471 (2017).
[Crossref]

Ding, W.

Du, G.

J. Yong, F. Chen, Q. Yang, G. Du, H. Bian, D. Zhang, J. Si, F. Yun, and X. Hou, “Rapid fabrication of large-area concave microlens arrays on PDMS by a femtosecond laser,” ACS Appl. Mater. Interfaces 5(19), 9382–9385 (2013).
[Crossref] [PubMed]

Ee, Y.-K.

X.-H. Li, R. Song, Y.-K. Ee, P. Kumnorkaew, J. F. Gilchrist, and N. Tansu, “Light extraction efficiency and radiation patterns of III-nitride light-emitting diodes with colloidal microlens arrays with various aspect ratios,” IEEE Photonics J. 3(3), 489–499 (2011).
[Crossref]

Y.-K. Ee, P. Kumnorkaew, R. A. Arif, H. Tong, J. F. Gilchrist, and N. Tansu, “Light extraction efficiency enhancement of InGaN quantum wells light-emitting diodes with polydimethylsiloxane concave microstructures,” Opt. Express 17(16), 13747–13757 (2009).
[Crossref] [PubMed]

Eswaran, S. K.

J. S. Kim, S. K. Eswaran, O. H. Kwon, S. J. Han, J. H. Lee, and Y. S. Cho, “White-light-emitting diodes: enhanced luminescence characteristics of remote yellow silicate phosphors printed on nanoscale surface-roughened glass substrates for white light-emitting diodes,” Adv. Opt. Mater. 4(7), 976 (2016).
[Crossref]

Feng, L.

Gilchrist, J. F.

X.-H. Li, R. Song, Y.-K. Ee, P. Kumnorkaew, J. F. Gilchrist, and N. Tansu, “Light extraction efficiency and radiation patterns of III-nitride light-emitting diodes with colloidal microlens arrays with various aspect ratios,” IEEE Photonics J. 3(3), 489–499 (2011).
[Crossref]

Y.-K. Ee, P. Kumnorkaew, R. A. Arif, H. Tong, J. F. Gilchrist, and N. Tansu, “Light extraction efficiency enhancement of InGaN quantum wells light-emitting diodes with polydimethylsiloxane concave microstructures,” Opt. Express 17(16), 13747–13757 (2009).
[Crossref] [PubMed]

Guo, X.

Han, S. J.

J. S. Kim, S. K. Eswaran, O. H. Kwon, S. J. Han, J. H. Lee, and Y. S. Cho, “White-light-emitting diodes: enhanced luminescence characteristics of remote yellow silicate phosphors printed on nanoscale surface-roughened glass substrates for white light-emitting diodes,” Adv. Opt. Mater. 4(7), 976 (2016).
[Crossref]

Heo, J.

Hou, X.

J. Yong, F. Chen, Q. Yang, G. Du, H. Bian, D. Zhang, J. Si, F. Yun, and X. Hou, “Rapid fabrication of large-area concave microlens arrays on PDMS by a femtosecond laser,” ACS Appl. Mater. Interfaces 5(19), 9382–9385 (2013).
[Crossref] [PubMed]

Hsieh, H.-T.

H.-T. Hsieh and G.-D. J. Su, “A novel boundary-confined method for high numerical aperture microlens array fabrication,” J. Micromech. Microeng. 20(3), 035023 (2010).
[Crossref]

Hu, R.

Y. Ma, R. Hu, X. Yu, W. Shu, and X. Luo, “A modified bidirectional thermal resistance model for junction and phosphor temperature estimation in phosphor-converted light-emitting diodes,” Int. J. Heat Mass Transfer 106, 1–6 (2017).
[Crossref]

X. Luo, R. Hu, S. Liu, and K. Wang, “Heat and fluid flow in high-power LED packaging and applications,” Prog. Energ. Combust. 56, 1–32 (2016).
[Crossref]

Huang, F.

Z. Lin, H. Lin, J. Xu, F. Huang, H. Chen, B. Wang, and Y. Wang, “Highly thermal-stable warm w-LED based on Ce:YAG PiG stacked with a red phosphor layer,” J. Alloys Compd. 649, 661–665 (2015).
[Crossref]

Huang, J.-C.

Huang, Y.-C.

Hyun, J. Y.

Y. H. Kim, P. Arunkumar, B. Y. Kim, S. Unithrattil, E. Kim, S.-H. Moon, J. Y. Hyun, K. H. Kim, D. Lee, J.-S. Lee, and W. B. Im, “A zero-thermal-quenching phosphor,” Nat. Mater. 16(5), 543–550 (2017).
[Crossref] [PubMed]

Im, W. B.

Jeong, K.-H.

H. Jung and K.-H. Jeong, “Monolithic polymer microlens arrays with high numerical aperture and high packing density,” ACS Appl. Mater. Interfaces 7(4), 2160–2165 (2015).
[Crossref] [PubMed]

Jiang, J.

B. Bao, J. Jiang, F. Li, P. Zhang, S. Chen, Q. Yang, S. Wang, B. Su, L. Jiang, and Y. Song, “Fabrication of patterned concave microstructures by inkjet imprinting,” Adv. Funct. Mater. 25(22), 3286–3294 (2015).
[Crossref]

Jiang, L.

B. Bao, J. Jiang, F. Li, P. Zhang, S. Chen, Q. Yang, S. Wang, B. Su, L. Jiang, and Y. Song, “Fabrication of patterned concave microstructures by inkjet imprinting,” Adv. Funct. Mater. 25(22), 3286–3294 (2015).
[Crossref]

Jung, H.

H. Jung and K.-H. Jeong, “Monolithic polymer microlens arrays with high numerical aperture and high packing density,” ACS Appl. Mater. Interfaces 7(4), 2160–2165 (2015).
[Crossref] [PubMed]

Kim, B. Y.

Y. H. Kim, P. Arunkumar, B. Y. Kim, S. Unithrattil, E. Kim, S.-H. Moon, J. Y. Hyun, K. H. Kim, D. Lee, J.-S. Lee, and W. B. Im, “A zero-thermal-quenching phosphor,” Nat. Mater. 16(5), 543–550 (2017).
[Crossref] [PubMed]

Kim, E.

Y. H. Kim, P. Arunkumar, B. Y. Kim, S. Unithrattil, E. Kim, S.-H. Moon, J. Y. Hyun, K. H. Kim, D. Lee, J.-S. Lee, and W. B. Im, “A zero-thermal-quenching phosphor,” Nat. Mater. 16(5), 543–550 (2017).
[Crossref] [PubMed]

Kim, G. B.

Kim, H. J.

Y. H. Kim, N. S. M. Viswanath, S. Unithrattil, H. J. Kim, and W. B. Im, “Review—Phosphor plates for high-power LED applications: challenges and opportunities toward perfect lighting,” ECS J. Solid State Sci. Technol. 7(1), R3134–R3147 (2018).
[Crossref]

Kim, J. K.

E. F. Schubert and J. K. Kim, “Solid-state light sources getting smart,” Science 308(5726), 1274–1278 (2005).
[Crossref] [PubMed]

Kim, J. S.

J. S. Kim, S. K. Eswaran, O. H. Kwon, S. J. Han, J. H. Lee, and Y. S. Cho, “White-light-emitting diodes: enhanced luminescence characteristics of remote yellow silicate phosphors printed on nanoscale surface-roughened glass substrates for white light-emitting diodes,” Adv. Opt. Mater. 4(7), 976 (2016).
[Crossref]

Kim, K. H.

Y. H. Kim, P. Arunkumar, B. Y. Kim, S. Unithrattil, E. Kim, S.-H. Moon, J. Y. Hyun, K. H. Kim, D. Lee, J.-S. Lee, and W. B. Im, “A zero-thermal-quenching phosphor,” Nat. Mater. 16(5), 543–550 (2017).
[Crossref] [PubMed]

Kim, S.

Kim, Y. H.

Y. H. Kim, N. S. M. Viswanath, S. Unithrattil, H. J. Kim, and W. B. Im, “Review—Phosphor plates for high-power LED applications: challenges and opportunities toward perfect lighting,” ECS J. Solid State Sci. Technol. 7(1), R3134–R3147 (2018).
[Crossref]

Y. H. Kim, P. Arunkumar, B. Y. Kim, S. Unithrattil, E. Kim, S.-H. Moon, J. Y. Hyun, K. H. Kim, D. Lee, J.-S. Lee, and W. B. Im, “A zero-thermal-quenching phosphor,” Nat. Mater. 16(5), 543–550 (2017).
[Crossref] [PubMed]

Y. K. Lee, Y. H. Kim, J. Heo, W. B. Im, and W. J. Chung, “Control of chromaticity by phosphor in glasses with low temperature sintered silicate glasses for LED applications,” Opt. Lett. 39(14), 4084–4087 (2014).
[Crossref] [PubMed]

Kuang, M.

M. Kuang, L. Wang, and Y. Song, “Controllable printing droplets for high-resolution patterns,” Adv. Mater. 26(40), 6950–6958 (2014).
[Crossref] [PubMed]

Kumnorkaew, P.

X.-H. Li, R. Song, Y.-K. Ee, P. Kumnorkaew, J. F. Gilchrist, and N. Tansu, “Light extraction efficiency and radiation patterns of III-nitride light-emitting diodes with colloidal microlens arrays with various aspect ratios,” IEEE Photonics J. 3(3), 489–499 (2011).
[Crossref]

Y.-K. Ee, P. Kumnorkaew, R. A. Arif, H. Tong, J. F. Gilchrist, and N. Tansu, “Light extraction efficiency enhancement of InGaN quantum wells light-emitting diodes with polydimethylsiloxane concave microstructures,” Opt. Express 17(16), 13747–13757 (2009).
[Crossref] [PubMed]

Kwon, O. H.

J. S. Kim, S. K. Eswaran, O. H. Kwon, S. J. Han, J. H. Lee, and Y. S. Cho, “White-light-emitting diodes: enhanced luminescence characteristics of remote yellow silicate phosphors printed on nanoscale surface-roughened glass substrates for white light-emitting diodes,” Adv. Opt. Mater. 4(7), 976 (2016).
[Crossref]

Lee, D.

Y. H. Kim, P. Arunkumar, B. Y. Kim, S. Unithrattil, E. Kim, S.-H. Moon, J. Y. Hyun, K. H. Kim, D. Lee, J.-S. Lee, and W. B. Im, “A zero-thermal-quenching phosphor,” Nat. Mater. 16(5), 543–550 (2017).
[Crossref] [PubMed]

Lee, H.

Lee, I. J.

Lee, J. H.

J. S. Kim, S. K. Eswaran, O. H. Kwon, S. J. Han, J. H. Lee, and Y. S. Cho, “White-light-emitting diodes: enhanced luminescence characteristics of remote yellow silicate phosphors printed on nanoscale surface-roughened glass substrates for white light-emitting diodes,” Adv. Opt. Mater. 4(7), 976 (2016).
[Crossref]

Lee, J. S.

Lee, J.-S.

Y. H. Kim, P. Arunkumar, B. Y. Kim, S. Unithrattil, E. Kim, S.-H. Moon, J. Y. Hyun, K. H. Kim, D. Lee, J.-S. Lee, and W. B. Im, “A zero-thermal-quenching phosphor,” Nat. Mater. 16(5), 543–550 (2017).
[Crossref] [PubMed]

Lee, Y. K.

Lei, B.

X. Zhang, J. Yu, J. Wang, B. Lei, Y. Liu, Y. Cho, R.-J. Xie, H.-W. Zhang, Y. Li, Z. Tian, Y. Li, and Q. Su, “All-inorganic light convertor based on phosphor-in-glass engineering for next-generation modular high-brightness white LEDs/LDs,” ACS Photonics 4(4), 986–995 (2017).
[Crossref]

Li, F.

B. Bao, J. Jiang, F. Li, P. Zhang, S. Chen, Q. Yang, S. Wang, B. Su, L. Jiang, and Y. Song, “Fabrication of patterned concave microstructures by inkjet imprinting,” Adv. Funct. Mater. 25(22), 3286–3294 (2015).
[Crossref]

Li, H.

X. Xu, H. Li, Y. Zhuo, R. Li, P. Tian, D. Xiong, and M. Chen, “High refractive index coating of phosphor-in-glass for enhanced light extraction efficiency of white LEDs,” J. Mater. Sci. 53(2), 1335–1345 (2018).
[Crossref]

Y. Peng, R. Li, H. Cheng, Z. Chen, H. Li, and M. Chen, “Facile preparation of patterned phosphor-in-glass with excellent luminous properties through screen-printing for high-power white light-emitting diodes,” J. Alloys Compd. 693, 279–284 (2017).
[Crossref]

Y. Peng, S. Wang, R. Li, H. Li, H. Cheng, M. Chen, and S. Liu, “Luminous efficacy enhancement of ultraviolet-excited white light-emitting diodes through multilayered phosphor-in-glass,” Appl. Opt. 55(18), 4933–4938 (2016).
[Crossref] [PubMed]

Li, R.

X. Xu, H. Li, Y. Zhuo, R. Li, P. Tian, D. Xiong, and M. Chen, “High refractive index coating of phosphor-in-glass for enhanced light extraction efficiency of white LEDs,” J. Mater. Sci. 53(2), 1335–1345 (2018).
[Crossref]

Y. Peng, R. Li, H. Cheng, Z. Chen, H. Li, and M. Chen, “Facile preparation of patterned phosphor-in-glass with excellent luminous properties through screen-printing for high-power white light-emitting diodes,” J. Alloys Compd. 693, 279–284 (2017).
[Crossref]

Y. Peng, R. Li, S. Wang, Z. Chen, L. Nie, and M. Chen, “Luminous properties and thermal reliability of screen-printed phosphor-in-glass-based white light-emitting diodes,” IEEE T. Electron Dev. 64(3), 1114–1119 (2017).
[Crossref]

Y. Peng, X. Guo, R. Li, H. Cheng, and M. Chen, “Thermally stable WLEDs with excellent luminous properties by screen-printing a patterned phosphor glass layer on a microstructured glass plate,” Appl. Opt. 56(12), 3270–3276 (2017).
[Crossref] [PubMed]

Y. Peng, R. Li, X. Guo, H. Zheng, and M. Chen, “Optical performance improvement of phosphor-in-glass based white light-emitting diodes through optimized packaging structure,” Appl. Opt. 55(29), 8189–8195 (2016).
[Crossref] [PubMed]

Y. Peng, S. Wang, R. Li, H. Li, H. Cheng, M. Chen, and S. Liu, “Luminous efficacy enhancement of ultraviolet-excited white light-emitting diodes through multilayered phosphor-in-glass,” Appl. Opt. 55(18), 4933–4938 (2016).
[Crossref] [PubMed]

Li, X.-H.

X.-H. Li, R. Song, Y.-K. Ee, P. Kumnorkaew, J. F. Gilchrist, and N. Tansu, “Light extraction efficiency and radiation patterns of III-nitride light-emitting diodes with colloidal microlens arrays with various aspect ratios,” IEEE Photonics J. 3(3), 489–499 (2011).
[Crossref]

Li, Y.

X. Zhang, J. Yu, J. Wang, B. Lei, Y. Liu, Y. Cho, R.-J. Xie, H.-W. Zhang, Y. Li, Z. Tian, Y. Li, and Q. Su, “All-inorganic light convertor based on phosphor-in-glass engineering for next-generation modular high-brightness white LEDs/LDs,” ACS Photonics 4(4), 986–995 (2017).
[Crossref]

X. Zhang, J. Yu, J. Wang, B. Lei, Y. Liu, Y. Cho, R.-J. Xie, H.-W. Zhang, Y. Li, Z. Tian, Y. Li, and Q. Su, “All-inorganic light convertor based on phosphor-in-glass engineering for next-generation modular high-brightness white LEDs/LDs,” ACS Photonics 4(4), 986–995 (2017).
[Crossref]

S. Wang, Y. Li, L. Feng, L. Zhang, Y. Zhang, X. Su, W. Ding, and F. Yun, “Laser patterning of Y3Al5O12:Ce3+ ceramic phosphor platelets for enhanced forward light extraction and angular color uniformity of white LEDs,” Opt. Express 24(15), 17522–17531 (2016).
[Crossref] [PubMed]

Liang, R.

Y. Peng, X. Guo, R. Liang, Y. Mou, H. Cheng, M. Chen, and S. Liu, “Fabrication of microlens arrays with controlled curvature by micromolding water condensing based porous films for deep ultraviolet LEDs,” ACS Photonics 4(10), 2479–2485 (2017).
[Crossref]

R. Liang, F. Wu, S. Wang, Q. Chen, J. Dai, and C. Chen, “Enhanced optical and thermal performance of eutectic flip-chip ultraviolet light-emitting diodes via AlN-doped-silicone encapsulant,” IEEE T. Electron Dev. 64(2), 467–471 (2017).
[Crossref]

Lin, H.

Z. Lin, H. Lin, J. Xu, F. Huang, H. Chen, B. Wang, and Y. Wang, “Highly thermal-stable warm w-LED based on Ce:YAG PiG stacked with a red phosphor layer,” J. Alloys Compd. 649, 661–665 (2015).
[Crossref]

R. Zhang, H. Lin, Y. Yu, D. Chen, J. Xu, and Y. Wang, “A new-generation color converter for high-power white LED: transparent Ce3+:YAG phosphor-in-glass,” Laser Photonics Rev. 8(1), 158–164 (2014).
[Crossref]

Lin, Z.

Z. Lin, H. Lin, J. Xu, F. Huang, H. Chen, B. Wang, and Y. Wang, “Highly thermal-stable warm w-LED based on Ce:YAG PiG stacked with a red phosphor layer,” J. Alloys Compd. 649, 661–665 (2015).
[Crossref]

Liu, S.

Y. Peng, X. Guo, R. Liang, Y. Mou, H. Cheng, M. Chen, and S. Liu, “Fabrication of microlens arrays with controlled curvature by micromolding water condensing based porous films for deep ultraviolet LEDs,” ACS Photonics 4(10), 2479–2485 (2017).
[Crossref]

Y. Peng, S. Wang, R. Li, H. Li, H. Cheng, M. Chen, and S. Liu, “Luminous efficacy enhancement of ultraviolet-excited white light-emitting diodes through multilayered phosphor-in-glass,” Appl. Opt. 55(18), 4933–4938 (2016).
[Crossref] [PubMed]

X. Luo, R. Hu, S. Liu, and K. Wang, “Heat and fluid flow in high-power LED packaging and applications,” Prog. Energ. Combust. 56, 1–32 (2016).
[Crossref]

L. Yang, M. Chen, Z. Lv, S. Wang, X. Liu, and S. Liu, “Preparation of a YAG:Ce phosphor glass by screen-printing technology and its application in LED packaging,” Opt. Lett. 38(13), 2240–2243 (2013).
[Crossref] [PubMed]

Liu, X.

Liu, Y.

X. Zhang, J. Yu, J. Wang, B. Lei, Y. Liu, Y. Cho, R.-J. Xie, H.-W. Zhang, Y. Li, Z. Tian, Y. Li, and Q. Su, “All-inorganic light convertor based on phosphor-in-glass engineering for next-generation modular high-brightness white LEDs/LDs,” ACS Photonics 4(4), 986–995 (2017).
[Crossref]

Luo, X.

Y. Ma, R. Hu, X. Yu, W. Shu, and X. Luo, “A modified bidirectional thermal resistance model for junction and phosphor temperature estimation in phosphor-converted light-emitting diodes,” Int. J. Heat Mass Transfer 106, 1–6 (2017).
[Crossref]

X. Luo, R. Hu, S. Liu, and K. Wang, “Heat and fluid flow in high-power LED packaging and applications,” Prog. Energ. Combust. 56, 1–32 (2016).
[Crossref]

Lv, Z.

Ma, M.

Ma, Y.

Y. Ma, R. Hu, X. Yu, W. Shu, and X. Luo, “A modified bidirectional thermal resistance model for junction and phosphor temperature estimation in phosphor-converted light-emitting diodes,” Int. J. Heat Mass Transfer 106, 1–6 (2017).
[Crossref]

Mont, F. W.

Moon, S.-H.

Y. H. Kim, P. Arunkumar, B. Y. Kim, S. Unithrattil, E. Kim, S.-H. Moon, J. Y. Hyun, K. H. Kim, D. Lee, J.-S. Lee, and W. B. Im, “A zero-thermal-quenching phosphor,” Nat. Mater. 16(5), 543–550 (2017).
[Crossref] [PubMed]

Mou, Y.

Y. Peng, X. Guo, R. Liang, Y. Mou, H. Cheng, M. Chen, and S. Liu, “Fabrication of microlens arrays with controlled curvature by micromolding water condensing based porous films for deep ultraviolet LEDs,” ACS Photonics 4(10), 2479–2485 (2017).
[Crossref]

Nie, L.

Y. Peng, R. Li, S. Wang, Z. Chen, L. Nie, and M. Chen, “Luminous properties and thermal reliability of screen-printed phosphor-in-glass-based white light-emitting diodes,” IEEE T. Electron Dev. 64(3), 1114–1119 (2017).
[Crossref]

Peng, Y.

Y. Peng, X. Guo, R. Li, H. Cheng, and M. Chen, “Thermally stable WLEDs with excellent luminous properties by screen-printing a patterned phosphor glass layer on a microstructured glass plate,” Appl. Opt. 56(12), 3270–3276 (2017).
[Crossref] [PubMed]

Y. Peng, R. Li, S. Wang, Z. Chen, L. Nie, and M. Chen, “Luminous properties and thermal reliability of screen-printed phosphor-in-glass-based white light-emitting diodes,” IEEE T. Electron Dev. 64(3), 1114–1119 (2017).
[Crossref]

Y. Peng, R. Li, H. Cheng, Z. Chen, H. Li, and M. Chen, “Facile preparation of patterned phosphor-in-glass with excellent luminous properties through screen-printing for high-power white light-emitting diodes,” J. Alloys Compd. 693, 279–284 (2017).
[Crossref]

Y. Peng, X. Guo, R. Liang, Y. Mou, H. Cheng, M. Chen, and S. Liu, “Fabrication of microlens arrays with controlled curvature by micromolding water condensing based porous films for deep ultraviolet LEDs,” ACS Photonics 4(10), 2479–2485 (2017).
[Crossref]

Y. Peng, S. Wang, R. Li, H. Li, H. Cheng, M. Chen, and S. Liu, “Luminous efficacy enhancement of ultraviolet-excited white light-emitting diodes through multilayered phosphor-in-glass,” Appl. Opt. 55(18), 4933–4938 (2016).
[Crossref] [PubMed]

Y. Peng, R. Li, X. Guo, H. Zheng, and M. Chen, “Optical performance improvement of phosphor-in-glass based white light-emitting diodes through optimized packaging structure,” Appl. Opt. 55(29), 8189–8195 (2016).
[Crossref] [PubMed]

Schubert, E. F.

Shu, W.

Y. Ma, R. Hu, X. Yu, W. Shu, and X. Luo, “A modified bidirectional thermal resistance model for junction and phosphor temperature estimation in phosphor-converted light-emitting diodes,” Int. J. Heat Mass Transfer 106, 1–6 (2017).
[Crossref]

Si, J.

J. Yong, F. Chen, Q. Yang, G. Du, H. Bian, D. Zhang, J. Si, F. Yun, and X. Hou, “Rapid fabrication of large-area concave microlens arrays on PDMS by a femtosecond laser,” ACS Appl. Mater. Interfaces 5(19), 9382–9385 (2013).
[Crossref] [PubMed]

Sone, C.

Song, R.

X.-H. Li, R. Song, Y.-K. Ee, P. Kumnorkaew, J. F. Gilchrist, and N. Tansu, “Light extraction efficiency and radiation patterns of III-nitride light-emitting diodes with colloidal microlens arrays with various aspect ratios,” IEEE Photonics J. 3(3), 489–499 (2011).
[Crossref]

Song, Y.

B. Bao, J. Jiang, F. Li, P. Zhang, S. Chen, Q. Yang, S. Wang, B. Su, L. Jiang, and Y. Song, “Fabrication of patterned concave microstructures by inkjet imprinting,” Adv. Funct. Mater. 25(22), 3286–3294 (2015).
[Crossref]

M. Kuang, L. Wang, and Y. Song, “Controllable printing droplets for high-resolution patterns,” Adv. Mater. 26(40), 6950–6958 (2014).
[Crossref] [PubMed]

Steckl, A. J.

S. C. Allen and A. J. Steckl, “A nearly ideal phosphor-converted white light-emitting diode,” Appl. Phys. Lett. 92(14), 143309 (2008).
[Crossref]

Su, B.

B. Bao, J. Jiang, F. Li, P. Zhang, S. Chen, Q. Yang, S. Wang, B. Su, L. Jiang, and Y. Song, “Fabrication of patterned concave microstructures by inkjet imprinting,” Adv. Funct. Mater. 25(22), 3286–3294 (2015).
[Crossref]

Su, G.-D. J.

H.-T. Hsieh and G.-D. J. Su, “A novel boundary-confined method for high numerical aperture microlens array fabrication,” J. Micromech. Microeng. 20(3), 035023 (2010).
[Crossref]

Su, Q.

X. Zhang, J. Yu, J. Wang, B. Lei, Y. Liu, Y. Cho, R.-J. Xie, H.-W. Zhang, Y. Li, Z. Tian, Y. Li, and Q. Su, “All-inorganic light convertor based on phosphor-in-glass engineering for next-generation modular high-brightness white LEDs/LDs,” ACS Photonics 4(4), 986–995 (2017).
[Crossref]

Su, X.

Tansu, N.

X.-H. Li, R. Song, Y.-K. Ee, P. Kumnorkaew, J. F. Gilchrist, and N. Tansu, “Light extraction efficiency and radiation patterns of III-nitride light-emitting diodes with colloidal microlens arrays with various aspect ratios,” IEEE Photonics J. 3(3), 489–499 (2011).
[Crossref]

Y.-K. Ee, P. Kumnorkaew, R. A. Arif, H. Tong, J. F. Gilchrist, and N. Tansu, “Light extraction efficiency enhancement of InGaN quantum wells light-emitting diodes with polydimethylsiloxane concave microstructures,” Opt. Express 17(16), 13747–13757 (2009).
[Crossref] [PubMed]

Tian, P.

X. Xu, H. Li, Y. Zhuo, R. Li, P. Tian, D. Xiong, and M. Chen, “High refractive index coating of phosphor-in-glass for enhanced light extraction efficiency of white LEDs,” J. Mater. Sci. 53(2), 1335–1345 (2018).
[Crossref]

Tian, Z.

X. Zhang, J. Yu, J. Wang, B. Lei, Y. Liu, Y. Cho, R.-J. Xie, H.-W. Zhang, Y. Li, Z. Tian, Y. Li, and Q. Su, “All-inorganic light convertor based on phosphor-in-glass engineering for next-generation modular high-brightness white LEDs/LDs,” ACS Photonics 4(4), 986–995 (2017).
[Crossref]

Tong, H.

Tsai, C.-C.

Unithrattil, S.

Y. H. Kim, N. S. M. Viswanath, S. Unithrattil, H. J. Kim, and W. B. Im, “Review—Phosphor plates for high-power LED applications: challenges and opportunities toward perfect lighting,” ECS J. Solid State Sci. Technol. 7(1), R3134–R3147 (2018).
[Crossref]

Y. H. Kim, P. Arunkumar, B. Y. Kim, S. Unithrattil, E. Kim, S.-H. Moon, J. Y. Hyun, K. H. Kim, D. Lee, J.-S. Lee, and W. B. Im, “A zero-thermal-quenching phosphor,” Nat. Mater. 16(5), 543–550 (2017).
[Crossref] [PubMed]

J. S. Lee, S. Unithrattil, S. Kim, I. J. Lee, H. Lee, and W. B. Im, “Robust moisture and thermally stable phosphor glass plate for highly unstable sulfide phosphors in high-power white light-emitting diodes,” Opt. Lett. 38(17), 3298–3300 (2013).
[Crossref] [PubMed]

Viswanath, N. S. M.

Y. H. Kim, N. S. M. Viswanath, S. Unithrattil, H. J. Kim, and W. B. Im, “Review—Phosphor plates for high-power LED applications: challenges and opportunities toward perfect lighting,” ECS J. Solid State Sci. Technol. 7(1), R3134–R3147 (2018).
[Crossref]

Wang, B.

Z. Lin, H. Lin, J. Xu, F. Huang, H. Chen, B. Wang, and Y. Wang, “Highly thermal-stable warm w-LED based on Ce:YAG PiG stacked with a red phosphor layer,” J. Alloys Compd. 649, 661–665 (2015).
[Crossref]

Wang, J.

X. Zhang, J. Yu, J. Wang, B. Lei, Y. Liu, Y. Cho, R.-J. Xie, H.-W. Zhang, Y. Li, Z. Tian, Y. Li, and Q. Su, “All-inorganic light convertor based on phosphor-in-glass engineering for next-generation modular high-brightness white LEDs/LDs,” ACS Photonics 4(4), 986–995 (2017).
[Crossref]

Wang, K.

X. Luo, R. Hu, S. Liu, and K. Wang, “Heat and fluid flow in high-power LED packaging and applications,” Prog. Energ. Combust. 56, 1–32 (2016).
[Crossref]

Wang, L.

M. Kuang, L. Wang, and Y. Song, “Controllable printing droplets for high-resolution patterns,” Adv. Mater. 26(40), 6950–6958 (2014).
[Crossref] [PubMed]

Wang, S.

Y. Peng, R. Li, S. Wang, Z. Chen, L. Nie, and M. Chen, “Luminous properties and thermal reliability of screen-printed phosphor-in-glass-based white light-emitting diodes,” IEEE T. Electron Dev. 64(3), 1114–1119 (2017).
[Crossref]

R. Liang, F. Wu, S. Wang, Q. Chen, J. Dai, and C. Chen, “Enhanced optical and thermal performance of eutectic flip-chip ultraviolet light-emitting diodes via AlN-doped-silicone encapsulant,” IEEE T. Electron Dev. 64(2), 467–471 (2017).
[Crossref]

S. Wang, Y. Li, L. Feng, L. Zhang, Y. Zhang, X. Su, W. Ding, and F. Yun, “Laser patterning of Y3Al5O12:Ce3+ ceramic phosphor platelets for enhanced forward light extraction and angular color uniformity of white LEDs,” Opt. Express 24(15), 17522–17531 (2016).
[Crossref] [PubMed]

Y. Peng, S. Wang, R. Li, H. Li, H. Cheng, M. Chen, and S. Liu, “Luminous efficacy enhancement of ultraviolet-excited white light-emitting diodes through multilayered phosphor-in-glass,” Appl. Opt. 55(18), 4933–4938 (2016).
[Crossref] [PubMed]

B. Bao, J. Jiang, F. Li, P. Zhang, S. Chen, Q. Yang, S. Wang, B. Su, L. Jiang, and Y. Song, “Fabrication of patterned concave microstructures by inkjet imprinting,” Adv. Funct. Mater. 25(22), 3286–3294 (2015).
[Crossref]

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R. Zhang, H. Lin, Y. Yu, D. Chen, J. Xu, and Y. Wang, “A new-generation color converter for high-power white LED: transparent Ce3+:YAG phosphor-in-glass,” Laser Photonics Rev. 8(1), 158–164 (2014).
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Wu, F.

R. Liang, F. Wu, S. Wang, Q. Chen, J. Dai, and C. Chen, “Enhanced optical and thermal performance of eutectic flip-chip ultraviolet light-emitting diodes via AlN-doped-silicone encapsulant,” IEEE T. Electron Dev. 64(2), 467–471 (2017).
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Xie, R.-J.

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Xiong, D.

X. Xu, H. Li, Y. Zhuo, R. Li, P. Tian, D. Xiong, and M. Chen, “High refractive index coating of phosphor-in-glass for enhanced light extraction efficiency of white LEDs,” J. Mater. Sci. 53(2), 1335–1345 (2018).
[Crossref]

Xu, J.

Z. Lin, H. Lin, J. Xu, F. Huang, H. Chen, B. Wang, and Y. Wang, “Highly thermal-stable warm w-LED based on Ce:YAG PiG stacked with a red phosphor layer,” J. Alloys Compd. 649, 661–665 (2015).
[Crossref]

R. Zhang, H. Lin, Y. Yu, D. Chen, J. Xu, and Y. Wang, “A new-generation color converter for high-power white LED: transparent Ce3+:YAG phosphor-in-glass,” Laser Photonics Rev. 8(1), 158–164 (2014).
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X. Xu, H. Li, Y. Zhuo, R. Li, P. Tian, D. Xiong, and M. Chen, “High refractive index coating of phosphor-in-glass for enhanced light extraction efficiency of white LEDs,” J. Mater. Sci. 53(2), 1335–1345 (2018).
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B. Bao, J. Jiang, F. Li, P. Zhang, S. Chen, Q. Yang, S. Wang, B. Su, L. Jiang, and Y. Song, “Fabrication of patterned concave microstructures by inkjet imprinting,” Adv. Funct. Mater. 25(22), 3286–3294 (2015).
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R. Zhang, H. Lin, Y. Yu, D. Chen, J. Xu, and Y. Wang, “A new-generation color converter for high-power white LED: transparent Ce3+:YAG phosphor-in-glass,” Laser Photonics Rev. 8(1), 158–164 (2014).
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Zhang, X.

X. Zhang, J. Yu, J. Wang, B. Lei, Y. Liu, Y. Cho, R.-J. Xie, H.-W. Zhang, Y. Li, Z. Tian, Y. Li, and Q. Su, “All-inorganic light convertor based on phosphor-in-glass engineering for next-generation modular high-brightness white LEDs/LDs,” ACS Photonics 4(4), 986–995 (2017).
[Crossref]

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X. Xu, H. Li, Y. Zhuo, R. Li, P. Tian, D. Xiong, and M. Chen, “High refractive index coating of phosphor-in-glass for enhanced light extraction efficiency of white LEDs,” J. Mater. Sci. 53(2), 1335–1345 (2018).
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X. Zhang, J. Yu, J. Wang, B. Lei, Y. Liu, Y. Cho, R.-J. Xie, H.-W. Zhang, Y. Li, Z. Tian, Y. Li, and Q. Su, “All-inorganic light convertor based on phosphor-in-glass engineering for next-generation modular high-brightness white LEDs/LDs,” ACS Photonics 4(4), 986–995 (2017).
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Y. Ma, R. Hu, X. Yu, W. Shu, and X. Luo, “A modified bidirectional thermal resistance model for junction and phosphor temperature estimation in phosphor-converted light-emitting diodes,” Int. J. Heat Mass Transfer 106, 1–6 (2017).
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Figures (7)

Fig. 1
Fig. 1

Fabrication process of patterned red phosphor layer on YAG:Ce3+ PiG.

Fig. 2
Fig. 2

(a) DSC curve and (b) measured refractive index of prepared glass matrix.

Fig. 3
Fig. 3

(a) Normalized PLE and PL spectra of prepared YAG:Ce3+ PiG. (b) PL emission spectra of prepared YAG:Ce3+ PiG coated with different number of red phosphor layers.

Fig. 4
Fig. 4

Photographs of (a) unpatterned samples and (b) patterned samples with different red phosphor layers. (c) Cross-sectional SEM image of patterned sample and EDS curve of YAG:Ce3+ glass layer.

Fig. 5
Fig. 5

Top and cross-sectional SEM images of the fabricated micro-concave arrays at the UV pre-curing time of (a) 20 s, (b) 30 s, and (c) 40 s. (d) Average width and depth of the fabricated micro-concave at different UV pre-curing time.

Fig. 6
Fig. 6

(a) EL spectra and (b) CIE chromaticity coordinate distributions of WLED modules with different converter samples at the driving current of 350 mA. The inset shows the corresponding WLEDs in operation.

Fig. 7
Fig. 7

(a) LE of WLED modules with different samples as a function of current. (b) Far-filed emission intensities of unpatterned and patterned samples packaged WLED modules.

Tables (1)

Tables Icon

Table 1 Optical Performances of WLED Modules Packaged by Different Converter Samples at the Current of 350 mA