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

In Jae Lee, Hyun Sung Noh, Vijayakumar Elayappan, Dawool Kwon, Young Hoon Kim, Min Kyu Sun, Seoung Eon Kim, Haigun Lee

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

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%.

Original languageEnglish
Pages (from-to)14505-14511
Number of pages7
JournalCeramics International
Volume49
Issue number9
DOIs
Publication statusPublished - 2023 May 1

Bibliographical note

Funding Information:
This work was supported by the Industrial Strategic Technology Development program funded by the Ministry of Trade Industry & Energy, Korea (Project No. 10047778 ).

Publisher Copyright:
© 2023 Elsevier Ltd and Techna Group S.r.l.

Keywords

  • Ceramic phosphor plate
  • Phosphor in glass
  • White light-emitting diode

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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