CsPbBr3@CsPbBr3–xClx Perovskite Core–Shell Heterojunction Nanowires via a Postsynthetic Method with HCl Gas

Autor:	Dandan Song, Bo Qiao, Zheng Xu, Jingyue Cao, Pengjie Song, Gaoqian Zhang, Suling Zhao, Ahmed A. Al-Ghamdi, Zhaohui Shen, Wageh Swelm
Jazyk:	angličtina
Rok vydání:	2020
Předmět:	Materials science Ion exchange General Chemical Engineering Nanowire Heterojunction General Chemistry Article Core shell Chemistry Chemical engineering Nanocrystal Light emission Luminescence QD1-999 Perovskite (structure)
Zdroj:	ACS Omega, Vol 5, Iss 20, Pp 11578-11584 (2020) ACS Omega
ISSN:	2470-1343
Popis:	CsPbX3 (X = Cl, Br, I) perovskite nanocrystals (NCs) are promising materials due to their excellent optoelectronic properties. This work shows a successful anion exchange reaction in CsPbBr3 nanowire (NW) systems with HCl gas resulting in a blue-green light-emitting CsPbBr3@CsPbBr3-x Cl x core-shell heterojunction. By adjusting the reaction time and the reaction temperature, the structure and light emission of the NWs can be adjusted. The core-shell heterojunction NCs are stably luminescent in 24 h. The rational mechanism of anion exchange in perovskite NCs is also investigated. The work highlights the feasibility of NWs heterogeneously prepared under the HC1 gas atmosphere, which provides a new strategy for studying the two- and multicolor luminescent perovskite NCs.
Databáze:	OpenAIRE
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