Interfacial charge transfer in WS₂ monolayer/CsPbBr₃ microplate heterostructure

Abstract

Integration of heterogenous materials produces compelling physical phenomena and increased performance of optoelectronic devices. In this work, we integrate CsPbBr₃ microplate with WS₂ monolayer to investigate the interfacial carrier transfer mechanism in the heterojunction. The quenching of photoluminescence (PL) emission from CsPbBr₃ and WS₂ after heterostructure formation indicates efficient charge transfer in the junction. Low-temperature PL spectra reveal that the decreasing PL of WS₂ arises from the vanishing of biexcitons. Photodetection based on the WS₂/CsPbBr₃ heterostructure is demonstrated. The higher performance from the junction further certifies the occurrence of charge transfer in the heterojunction.

Keywords

TMDs / inorganic perovskite / heterostructure / charge transfer

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