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Color conversion properties of various thick-film phosphor-in-glasses depending on structural design for white LEDs

Title
Color conversion properties of various thick-film phosphor-in-glasses depending on structural design for white LEDs
Author
임원빈
Keywords
glass; LED; phosphors; thick films
Issue Date
2020-05
Publisher
WILEY
Citation
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v. 103, no. 8, page. 4266-4274
Abstract
Thick-film phosphor-in-glasses (PiGs) were fabricated via a screen-printing method with various phosphor layer structures, to compose a white light emitting diode (LED). Green (Lu3Al5O12:Ce3+) and red (CaAlSiN3:Eu2+) phosphors were mixed, layered, and patterned on a glass substrate. The chromaticity of each structured PiG was tuned to achieve a white LED by varying phosphor content and thickness. The emission spectra and the related various color conversion properties, including color coordinates, correlated color temperature (CCT), color rendering index (CRI), luminous efficacy (LE) and the color gamut of the mounted PiGs with different phosphor layer structures were examined and compared. Time-resolved photoluminescence (TRPL) measurements of the white LEDs with various phosphor layer structural designs were also obtained and compared. It was observed that spectral variation depended on the PiG layer structure. A proper PiG layer structural design was discussed for practical applications.
URI
https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.17123https://repository.hanyang.ac.kr/handle/20.500.11754/167112
ISSN
0002-7820; 1551-2916
DOI
10.1111/jace.17123
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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