Improved color rendering index and thermal stability of white LEDs with phosphor-in-glass using the SiO2-B2O3-ZnO-Na2O glass system
- Authors
- Han, Karam; Lee, Sang Hun; Choi, Yong Gyu; Im, Won Bin; Chung, Woon Jin
- Issue Date
- Aug-2016
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Glass; Phosphor; LED; Color rendering index; Thermal conductivity
- Citation
- JOURNAL OF NON-CRYSTALLINE SOLIDS, v.445-446, pp.77 - 80
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF NON-CRYSTALLINE SOLIDS
- Volume
- 445-446
- Start Page
- 77
- End Page
- 80
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/22242
- DOI
- 10.1016/j.jnoncrysol.2016.05.011
- ISSN
- 0022-3093
- Abstract
- Phosphor in glasses (PiGs) were fabricated for color tunable white LEDs using glass of the SiO2-B2O3-ZnO-Na2O system, which can be sintered at 550 °C. CaAlSiN3:Eu2 + (CASN:Eu2 +) red phosphor was added without its thermal degradation, and a mixture with Y3Al5O12:Ce3 + (YAG:Ce3 +) yellow phosphor demonstrated color tunable white LEDs when mounted on a blue LED. Variation of the glass to phosphor and phosphor to phosphor mixing ratio achieved a highly improved color rendering index (CRI), of up to 93. Thermal quenching property was also improved, reaching 98% of its original intensity even at 200 °C; the value depended on the phosphor content. Thermal conductivity values elucidate the improvement.
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