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Compositional study of borosilicate CsPbBr3 perovskite nanocrystals embedded glass for chemically stable white LEDs

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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. Photo-luminescence (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.

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Acknowledgements

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MIST) (No. NRF-2019R1A2C1007621 and NRF- RS-2023-00253671).

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Authors and Affiliations

  1. Advanced Technology Team, KCC Glass Corporation, 17-3, Mabuk-Ro 240Beon-gil, Giheung-gu, Yongin-si, Gyeonggi-do, Republic of Korea

    Hansol Lee

  2. Institute for Rare Metals and Division of Advanced Materials Engineering, Kongju National University, 1223-24, Cheonan-Daero, Seobuk-gu, Cheonan, Chungnam, 31080, Republic of Korea

    Devarajulu Gelija, Jinju Lee & Woon Jin Chung

  3. Special Optical Technology, Taihan Fiberoptics Co. Ltd., 49, Jangjagol-ro, Danwongu, Ansan-si, Gyeonggi-do, Republic of Korea

    Usik Kim

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  1. Hansol Lee
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Lee, H., Gelija, D., Kim, U. et al. Compositional study of borosilicate CsPbBr3 perovskite nanocrystals embedded glass for chemically stable white LEDs. J. Korean Ceram. Soc. 61, 482–491 (2024). https://doi.org/10.1007/s43207-024-00374-0

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