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J. Korean Ceram. Soc. > Volume 61(3); 2024 > Article
Journal of the Korean Ceramic Society 2024;61(3): 482-491.
doi: https://doi.org/10.1007/s43207-024-00374-0
Compositional study of borosilicate CsPbBr3 perovskite nanocrystals embedded glass for chemically stable white LEDs
Hansol Lee1, Devarajulu Gelija2, Usik Kim3, Jinju Lee2, Woon Jin Chung2
1Advanced Technology Team, KCC Glass Corporation, 17-3, Mabuk-Ro 240Beon-gil, Giheung-gu, Yongin-si, Gyeonggi-do, Republic of Korea
2Institute for Rare Metals and Division of Advanced Materials Engineering, Kongju National University, 1223-24, Cheonan-Daero, Seobuk-gu, Cheonan, Chungnam 31080, Republic of Korea
3Special Optical Technology, Taihan Fiberoptics Co. Ltd., 49, Jangjagol-ro, Danwongu, Ansan-si, Gyeonggi-do, Republic of Korea
Correspondence  Woon Jin Chung ,Email: wjin@kongju.ac.kr
Received: November 5, 2023; Revised: January 8, 2024   Accepted: January 16, 2024.  Published online: February 23, 2024.
ABSTRACT
CsPbBr3 perovskite nanocrystal embedded glasses (PNEGs) based on the borosilicate system were synthesized with varying compositions to obtain a chemically stable PNEG compared with a PNEG based on the germanate system. Photoluminescence (PL) and structural characteristics were examined to find the proper heat-treatment conditions for high quantum efficiency under a 450 nm blue light emitting diode (LED) excitation. The CsPbBr3 within the glass matrix was observed by transmission electron microscope (TEM). Comparative studies on the thermal, photonic and water stabilities of the obtained borosilicate PNEG with those of a germanate PNEG were carried out. The borosilicate CsPbBr3 PNEG was employed as a green phosphor along with K2SiF6:Mn4+ as a red phosphor to compose a white LED with phosphor in silicone (PiS) and a remote PiS structure, whose color gamut was examined for display applications.
Key words: Cesium lead halide  · Perovskite  · Glass ceramic  · White LED
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