(合著文章)In situ growth of a-CsPbI3 perovskite nanocrystals on the surface of reduced graphene oxide with enhanced stability and carrier transport quality

Abstract

Black perovskite phase cesium lead tri-iodide (CsPbI3) has shown great potentials in photochemical applications. However, colloidal CsPbI3 still suffers from the existence of ligands attached to the surface of nanocrystals (NCs) and serious photoluminescence (PL) quenching. Here, we develop two different gamma-phase CsPbI3 (γ-CsPbI3) NCs/WS2 heterostructures with two different two-dimensional morphologies of WS2 (nanoplates and few layers WS2 nanosheets) to improve the photocatalytic property of γ-CsPbI3 NCs. The large surface area and the presence of abundant functional groups on the surface of WS2 enables a bonding interaction with precursors in the mixture solution, which can reduce the number of ligands, and promote the formation and crystal quality of γ-CsPbI3 NCs. Exhilaratingly, we find that γ-CsPbI3 NCs fabricated with few-layers WS2 nanosheets exhibit a significant enhancement on …

Authors

Qi Zhang, Hui Nan, Yangying Zhou, Youchen Gu, Meiqian Tai, Yaxuan Wei,
Feng Hao*, Jianbao Li, Dan Oron* and Hong Lin*

DOI:10.1039/c9tc01012b


全文链接:https://pubs.acs.org/doi/abs/10.1021/acssuschemeng.9b06451

全文下载:www.nickwu.cn/articles/c9tc01012b.pdf

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