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Title: 2D photonic crystal layer assisted thiosilicate ceramic plate with red-emitting film for high quality w -LEDs

Abstract

In this work, we have succeeded in obtaining high quality warm w-light-emitting-diodes (LEDs) by adopting hybrid two-dimensional (2D) structure of SiNx photonic crystal layer (PCL) assisted cyan-emitting ceramic-plate thiosilicate SrLa2Si2S8:Ce3+ with red-emitting film SrLiAl3N4:Eu2+ phosphor on a 430 nm blue LED chip at 350 mA. 2D SiNx PCL was capped with thiosilicate is because it can enhance the luminous efficacy and maintain the low correlated color temperature (CCT) and high color-rendering index (CRI). High luminous efficacy (82.3 lm/W), high special CRI (R9=75) as well as the low CCT (5431 K) of the optimal w-LED was obtained due to the assistances of 2D SiNx PCL and narrow-band red-emitting phosphor with the doping percentage at 10 wt%. The synthesis processes, structural analysis, optical properties and LED device performances were detailed investigated to find out the relationship between the optimum composition and good optical properties. Based on intriguing luminescence properties by the 2D SiNx PCL and red-emitting film phosphor introducing, we proclaim this method could also have high potential application in other phosphor-converted w-LEDs.

Authors:
ORCiD logo [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Material Science and Engineering, Wuhan Institute of Technology, Wuhan Hubei China
  2. School of Power and Mechanical Engineering, Wuhan University, Wuhan Hubei China
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1397304
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of the American Ceramic Society; Journal Volume: 100; Journal Issue: 11
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE

Citation Formats

Dai, Wubin, Lei, Yifeng, Zhou, Jia, Zhao, Yan, Zheng, Yunhao, Xu, Man, Wang, Shulin, and Shen, Fan. 2D photonic crystal layer assisted thiosilicate ceramic plate with red-emitting film for high quality w -LEDs. United States: N. p., 2017. Web. doi:10.1111/jace.15041.
Dai, Wubin, Lei, Yifeng, Zhou, Jia, Zhao, Yan, Zheng, Yunhao, Xu, Man, Wang, Shulin, & Shen, Fan. 2D photonic crystal layer assisted thiosilicate ceramic plate with red-emitting film for high quality w -LEDs. United States. doi:10.1111/jace.15041.
Dai, Wubin, Lei, Yifeng, Zhou, Jia, Zhao, Yan, Zheng, Yunhao, Xu, Man, Wang, Shulin, and Shen, Fan. Wed . "2D photonic crystal layer assisted thiosilicate ceramic plate with red-emitting film for high quality w -LEDs". United States. doi:10.1111/jace.15041.
@article{osti_1397304,
title = {2D photonic crystal layer assisted thiosilicate ceramic plate with red-emitting film for high quality w -LEDs},
author = {Dai, Wubin and Lei, Yifeng and Zhou, Jia and Zhao, Yan and Zheng, Yunhao and Xu, Man and Wang, Shulin and Shen, Fan},
abstractNote = {In this work, we have succeeded in obtaining high quality warm w-light-emitting-diodes (LEDs) by adopting hybrid two-dimensional (2D) structure of SiNx photonic crystal layer (PCL) assisted cyan-emitting ceramic-plate thiosilicate SrLa2Si2S8:Ce3+ with red-emitting film SrLiAl3N4:Eu2+ phosphor on a 430 nm blue LED chip at 350 mA. 2D SiNx PCL was capped with thiosilicate is because it can enhance the luminous efficacy and maintain the low correlated color temperature (CCT) and high color-rendering index (CRI). High luminous efficacy (82.3 lm/W), high special CRI (R9=75) as well as the low CCT (5431 K) of the optimal w-LED was obtained due to the assistances of 2D SiNx PCL and narrow-band red-emitting phosphor with the doping percentage at 10 wt%. The synthesis processes, structural analysis, optical properties and LED device performances were detailed investigated to find out the relationship between the optimum composition and good optical properties. Based on intriguing luminescence properties by the 2D SiNx PCL and red-emitting film phosphor introducing, we proclaim this method could also have high potential application in other phosphor-converted w-LEDs.},
doi = {10.1111/jace.15041},
journal = {Journal of the American Ceramic Society},
number = 11,
volume = 100,
place = {United States},
year = {Wed Jul 05 00:00:00 EDT 2017},
month = {Wed Jul 05 00:00:00 EDT 2017}
}