Anomalous photovoltaics in Janus MoSSe monolayers

Liu, Chang; Liang, Tianyu; Sui, Xin; Du, Lena; Guo, Quanlin; Xue, Guodong; Huang, Chen; You, Yilong; Yao, Guangjie; Zhao, Mengze; Yin, Jianbo; Sun, Zhipei; Hong, Hao; Wang, Enge; Liu, Kaihui

doi:10.1038/s41467-024-55623-x

articleNature CommunicationsJan 9, 2025GOLD OA

Anomalous photovoltaics in Janus MoSSe monolayers

CLChang Liu TLTianyu Liang XSXin Sui LDLena Du QGQuanlin Guo

Collaborative Innovation Center of Quantum Matter · Peking University · +4 more institutions

PubMed

Indexed incrossrefdoajpubmed

Abstract

The anomalous photovoltaic effect (APE) in polar crystals is a promising avenue for overcoming the energy conversion efficiency limits of conventional photoelectric devices utilizing p-n junction architectures. To facilitate effective photocarrier separation and enhance the APE, polar materials need to be thinned down to maximize the depolarization field. Here, we demonstrate Janus MoSSe monolayers (~0.67 nm thick) with strong spontaneous photocurrent generation. A photoresponsivity up to 3 mA/W, with ~ 1% external quantum efficiency and ultrafast photoresponse (~50 ps) were observed in the MoSSe device. Moreover, unlike conventional 2D materials that require careful twist alignment, the photovoltage can be…

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47

total citations

FWCI: 19.01
Percentile: 100%
References: 49

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15

Topics & keywords

Topics

Keywords

Photovoltaics
Photocurrent
Janus
Materials science
Optoelectronics
Monolayer
Photovoltaic system
Energy conversion efficiency

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