Strong bulk photovoltaic effect in engineered edge-embedded van der Waals structures

Zihan Liang, Xin Zhou, Le Zhang, Xiang-Long Yu (), Yan Lv, Xuefen Song, Yongheng Zhou, Han Wang, Shuo Wang, Taihong Wang, Perry Ping Shum, Qian He, Yanjun Liu, Chao Zhu, Lin Wang () and Xiaolong Chen ()
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Zihan Liang: Southern University of Science and Technology
Xin Zhou: National University of Singapore
Le Zhang: Southern University of Science and Technology
Xiang-Long Yu: Southern University of Science and Technology
Yan Lv: Nanjing Tech University (NanjingTech)
Xuefen Song: Nanjing Tech University (NanjingTech)
Yongheng Zhou: Southern University of Science and Technology
Han Wang: Southern University of Science and Technology
Shuo Wang: Nanjing Tech University (NanjingTech)
Taihong Wang: Southern University of Science and Technology
Perry Ping Shum: Southern University of Science and Technology
Qian He: National University of Singapore
Yanjun Liu: Southern University of Science and Technology
Chao Zhu: Southeast University
Lin Wang: Nanjing Tech University (NanjingTech)
Xiaolong Chen: Southern University of Science and Technology

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Bulk photovoltaic effect (BPVE), a second-order nonlinear optical effect governed by the quantum geometric properties of materials, offers a promising approach to overcome the Shockley-Quiesser limit of traditional photovoltaic effect and further improve the efficiency of energy harvesting. Here, we propose an effective platform, the nano edges embedded in assembled van der Waals (vdW) homo- or hetero-structures with strong symmetry breaking, low dimensionality and abundant species, for BPVE investigations. The BPVE-induced photocurrents strongly depend on the orientation of edge-embedded structures and polarization of incident light. Reversed photocurrent polarity can be observed at left and right edge-embedded structures. Our work not only visualizes the unique optoelectronic effect in vdW nano edges, but also provides an effective strategy for achieving BPVE in engineered vdW structures.

Date: 2023
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DOI: 10.1038/s41467-023-39995-0

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