Activity enhancement of a photo-generated carrier in CsPbBr 3 nanocrystals improved by Cd element

Doping Cd element into perovskite materials is an effective strategy to improve the photoelectric property. However, the further discussion for carrier dynamic behavior in perovskites affected by Cd element remains not sufficient. In this research letter, based on steady and transient spectroscopy,...

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Bibliographic Details
Published in:Optics express 2022-10, Vol.30 (22), p.39840
Main Authors: Yao, Lianfei, Lou, Xue, Sui, Ning, Zhang, Wei, Xiao, Hongwei, Chi, Xiaochun, Zhang, Han-Zhuang, Wang, Yinghui
Format: Article
Language:English
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Summary:Doping Cd element into perovskite materials is an effective strategy to improve the photoelectric property. However, the further discussion for carrier dynamic behavior in perovskites affected by Cd element remains not sufficient. In this research letter, based on steady and transient spectroscopy, it is found that adding Cd element into CsPbBr 3 nanocrystals can enhance the activity of photo-generated carriers and accompany with the optimization of crystal structure. The former improves the carrier heating effect, which makes carrier keep high temperature for a long time and accelerate the bimolecular and the Auger recombination simultaneously. The latter can restrict the monomolecular recombination through passivating the defect states. Finally, they together improve the photoluminescence characteristics of the Cd doped CsPbBr 3 nanocrystals and make them exhibit a huge potential in the fields of optoelectronics or photo-catalysis.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.471687