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

다국어 초록 (Multilingual 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 fi nd the proper heat-treatment conditions for high quantum effi ciency under a 450 nm blue light emitting diode (LED) excitation. The CsPbBr 3 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 CsPbBr 3 PNEG was employed as a green phosphor along with K 2SiF6: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.