Abstract

In order to improve the luminous properties and thermal reliability of white light-emitting diodes (WLEDs), we proposed a promising phosphor-in-glass (PiG) converter, which was prepared by screen-printing a patterned phosphor glass layer on a microstructured glass plate. The patterned layer achieves four-quadrant phosphor geometry based on separated yellow Y3Al5O12:Ce3+ (YAG:Ce3+) and red CaAlSiN3:Eu2+ (CASN:Eu2+) phosphor parts. Comparison experiments between the patterned PiG with and without a microstructure array (MSA) were conducted at different phosphor glass thicknesses. Consequently, for the phosphor glass thickness of 75 μm, the luminous efficacy (LE) of the proposed PiG is increased by 12.5% owing to the reduction of total internal reflection at the glass–air interface by the MSA, and the corresponding correlated color temperature (CCT) and color rendering index are 3701 K and 85.1, respectively. Furthermore, the CCT deviations of patterned PiG are reduced from 405 to 115 K and 1004 to 548 K by the MSA at the average CCTs of 3800 K and 5500 K, respectively. The results demonstrate that the proposed PiG converter can improve the LE and angular color uniformity of multi-component PiG-based WLEDs simultaneously.

© 2017 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Thermally stable multi-color phosphor-in-glass bonded on flip-chip UV-LEDs for chromaticity-tunable WLEDs

Pengqiang Jiang, Yang Peng, Yun Mou, Hao Cheng, Mingxiang Chen, and Sheng Liu
Appl. Opt. 56(28) 7921-7926 (2017)

Flexible fabrication of a patterned red phosphor layer on a YAG:Ce3+ phosphor-in-glass for high-power WLEDs

Yang Peng, Yun Mou, Xing Guo, Xujia Xu, Hong Li, Mingxiang Chen, and Xiaobing Luo
Opt. Mater. Express 8(3) 605-614 (2018)

Improvement in angular color uniformity of white light-emitting diodes using screen-printed multilayer phosphor-in-glass

Simin Wang, Xing Chen, Mingxiang Chen, Huai Zheng, Hongru Yang, and Sheng Liu
Appl. Opt. 53(36) 8492-8498 (2014)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (13)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription