A low sintering temperature glass based on SiO2-P2O5-ZnO-B2O3-R2O system for white LEDs with high color rendering index

被引：27

作者：

Kim, Seonghyeon ^{[1
,2
]}

Park, Hyun-A ^{[1
,2
]}

Bin Im, Won ^{[3
]}

Heo, Jong ^{[4
,5
]}

Choi, Jae-Young ^{[6
]}

Chung, Woon Jin ^{[1
,2
]}

机构：

[1] Kongju Natl Univ, Inst Rare Met, Cheonan, Chungnam, South Korea

[2] Kongju Natl Univ, Div Adv Mat Engn, Cheonan, Chungnam, South Korea

[3] Chonnam Natl Univ, Dept Mat Sci & Engn, Gwangju, South Korea

[4] Pohang Univ Sci & Technol POSTECH, Dept Mat Sci & Engn, Pohang, Gyeongbuk, South Korea

[5] Pohang Univ Sci & Technol POSTECH, Div Adv Nucl Engn, Pohang, Gyeongbuk, South Korea

[6] Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon, Gyeonggido, South Korea

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2017年 / 100卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

glass; low temperature; optical materials; phosphors; sintering; PHOSPHOR-IN-GLASS; SILICATE-GLASSES; LIGHT; CHROMATICITY; DEGRADATION; RELIABILITY; EU3+;

D O I：

10.1111/jace.15043

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A low sintering temperature glass based on the SiO2-P2O5-ZnO-B2O3-R2O (R=K and Na) system was studied as a matrix for embedding phosphors to fabricate color tunable white LEDs. The proposed system, which uses no heavy-metal elements and can be sintered at 500 degrees C, incorporates thermally weak commercial phosphors such as CaAlSiN3:Eu2+ to produce phosphor-in-glasses (PiGs). Changing the mixing ratio of glass to phosphors affected the photo-luminescence spectra and color coordinates of the PiGs when mounted on a blue LED. The color rendering index (CRI) and color correlated temperature (CCT) of the LEDs were also varied with the mixing ratio, providing color tunable white LEDs. A high CRI, up to 93, as well as highly improved thermal stability were obtained, along with a low sintering temperature compared to other glass systems, suggesting the practical feasibility of the proposed system.

引用

页码：5186 / 5192

页数：7

共 28 条

[11] White luminescence characteristics of red/green silicate phosphor-glass thick film layers printed on glass substrate [J].