Anomalous photovoltaics in Janus MoSSe monolayers

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 further scaled up by simply stacking the MoSSe layers without the need for specific control on interlayer twist angles. Our work paves the way for the development of high-performance, flexible, and compact photovoltaics and optoelectronics with atomically engineered Janus polar materials.

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Publication Details

Journal
Nature Communications
Published
2025-01-09
DOI
https://doi.org/10.1038/s41467-024-55623-x
Citations
41
Primary Topic
2D Materials and Applications
Type
article
Field-Weighted Citation Impact
21.23

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article

Anomalous photovoltaics in Janus MoSSe monolayers

Mengze Zhao, Guodong Xue, Zhipei Sun, Kaihui Liu et al.
41 citations
Nature Communications
2D Materials and Applications
21.23
article

Anomalous photovoltaics in Janus MoSSe monolayers

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

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 further scaled up by simply stacking the MoSSe layers without the need for specific control on interlayer twist angles. Our work paves the way for the development of high-performance, flexible, and compact photovoltaics and optoelectronics with atomically engineered Janus polar materials.

Nature CommunicationsVol. 16(1)
Peking University (CN), Songshan Lake Materials Laboratory (CN), Collaborative Innovation Center of Quantum Matter (CN), Institute for Advanced Study (DE), Capital Normal University (CN), Aalto University (FI)
National Natural Science Foundation of China, Chinese Academy of Sciences, China Postdoctoral Science Foundation
Affordable and clean energy
Openalex Percentile: Top 0%
2D Materials and Applications
21.23
DOIOpen Access PDFOpenAlex
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