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High luminous efficiency of a phosphor-in-glass plate by optimization of the glass and phosphor content for high-power LED applications.

Authors :
Lee, In-Jae
Noh, Hyun Sung
Elayappan, Vijayakumar
Kwon, Dawool
Kim, Young Hoon
Sun, Min Kyu
Kim, Seoung Eon
Lee, Haigun
Source :
Ceramics International. May2023:Part A, Vol. 49 Issue 9, p14505-14511. 7p.
Publication Year :
2023

Abstract

Generally, white light-emitting diodes (LEDs) are fabricated by combining blue LED chips with yellow phosphors. When fabricating white LEDs, the phosphor is typically mixed with an organic resin and applied to the LED chips as a paste. A phosphor-in-glass (PiG) plate can alternatively be used to address the poor high-temperature reliability of the paste method. However, because pores form in the PiG plate during the sintering process, this method results in a loss of optical efficiency. Accordingly, we aimed to improve the fluidity of glass and light efficiency by optimizing the sintering temperature of the glass powder and the phosphor content respectively for reducing internal porosity in the PiG. In this study, glass powder was sintered at different temperatures to produce glass plates, while also varying the phosphor content to fabricate PiG plates. The optimal light characteristics were realized with a glass sintering temperature of 640 °C and a phosphor content of 20 wt%. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
02728842
Volume :
49
Issue :
9
Database :
Academic Search Index
Journal :
Ceramics International
Publication Type :
Academic Journal
Accession number :
162705535
Full Text :
https://doi.org/10.1016/j.ceramint.2023.01.040