A low sintering temperature glass based on SiO2?P2O5?ZnO?B2O3?R2O system for white LEDs with high color rendering index
SCIE
SCOPUS
- Title
- A low sintering temperature glass based on SiO2?P2O5?ZnO?B2O3?R2O system for white LEDs with high color rendering index
- Authors
- Kim, S.; Park, H.-A.; Im, W.B.; Heo, J.; Choi, J.-Y.; Chung, W.J.
- Date Issued
- 2017-11
- Publisher
- WILEY-BLACKWELL
- Abstract
- 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��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. ? 2017 The American Ceramic Society
- Keywords
- Color; Europium; Glass; Light emission; Luminescence; Mixing; Optical glass; Optical materials; Phosphors; Silica; Zinc oxide; Color coordinates; Color rendering index; Color tunable; Heavy metal elements; High color rendering index; Low sintering temperature; Low temperatures; Photo- luminescence spectrum; Sintering
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/50951
- DOI
- 10.1111/jace.15043
- ISSN
- 0002-7820
- Article Type
- Article
- Citation
- JOURNAL OF THE AMERICAN CERAMIC SOCIETY, vol. 100, no. 11, page. 5186 - 5192, 2017-11
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