TY - JOUR
T1 - One-pot room-temperature synthesis of CsPbBr3/SiO2 nanocrystals with improved stability for white light-emitting diodes
AU - Zhang, Yu
AU - Wen, Yunli
AU - Dai, Yuxiang
AU - Li, Guishun
AU - Yun, Junqiang
AU - Jing, Chengbin
N1 - Publisher Copyright:
© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2025.
PY - 2025/9
Y1 - 2025/9
N2 - The susceptibility to optical instability of perovskite nanocrystals (NCs) under ambient conditions is a serious hindrance for practical applications. The conventional SiO2 coating method for enhancing stability suffered from long reaction times and complicated preparation procedures. In this study, a facile and convenient room-temperature one-pot approach was developed to fabricate CsPbBr3/SiO2 NCs, which involves the addition of tetramethoxysilane (TMOS) in advance. Owing to surface passivation, the PLQY of the CsPbBr3/SiO2 NCs increased to 90% from 70% of the primitive CsPbBr3 NCs. The SiO2 layer formed by the TMOS hydrolysis and condensation reactions also protect the CsPbBr3 NCs from external environment stimuli. Compared with the pristine CsPbBr3 NCs, the air stability, structural stability, polar solvent resistance, thermal stability, and UV resistance stability of the CsPbBr3/SiO2 NCs are markedly enhanced. Also, the CsPbBr3/SiO2 NCs can be used as green phosphors for white light-emitting diode (WLED), which exhibits a luminous efficiency of 40 lm/W.
AB - The susceptibility to optical instability of perovskite nanocrystals (NCs) under ambient conditions is a serious hindrance for practical applications. The conventional SiO2 coating method for enhancing stability suffered from long reaction times and complicated preparation procedures. In this study, a facile and convenient room-temperature one-pot approach was developed to fabricate CsPbBr3/SiO2 NCs, which involves the addition of tetramethoxysilane (TMOS) in advance. Owing to surface passivation, the PLQY of the CsPbBr3/SiO2 NCs increased to 90% from 70% of the primitive CsPbBr3 NCs. The SiO2 layer formed by the TMOS hydrolysis and condensation reactions also protect the CsPbBr3 NCs from external environment stimuli. Compared with the pristine CsPbBr3 NCs, the air stability, structural stability, polar solvent resistance, thermal stability, and UV resistance stability of the CsPbBr3/SiO2 NCs are markedly enhanced. Also, the CsPbBr3/SiO2 NCs can be used as green phosphors for white light-emitting diode (WLED), which exhibits a luminous efficiency of 40 lm/W.
UR - https://www.scopus.com/pages/publications/105005114098
U2 - 10.1140/epjs/s11734-025-01651-7
DO - 10.1140/epjs/s11734-025-01651-7
M3 - 文章
AN - SCOPUS:105005114098
SN - 1951-6355
VL - 234
SP - 3517
EP - 3526
JO - European Physical Journal: Special Topics
JF - European Physical Journal: Special Topics
IS - 14
ER -