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中国物理学会期刊

二维材料体光伏效应研究进展

CSTR: 32037.14.aps.72.20231786

Research progress of bulk photovoltaic effect in two-dimensional materials

CSTR: 32037.14.aps.72.20231786
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  • 体光伏效应是一种二阶非线性光电响应, 指非中心对称结构材料在均匀光辐照下产生稳态的光电流. 体光伏效应由于开路电压不受半导体能隙限制, 并且功率转换效率可以突破Shockley-Queisser极限, 因此引发广泛关注. 此外, 体光伏效应与固体的量子几何性质(如Berry曲率和量子度规)密切相关, 是一种研究晶体电极化、轨道磁化和量子霍尔效应的有效手段. 二维材料具有丰富的电、光、磁、拓扑性质及相互作用机制, 可有效提高体光伏器件性能(如拓展体光伏效应响应范围等), 对探索基础物理问题亦具有重要的研究价值. 本文概述了体光伏效应的发展历程及其几种物理机制, 重点讨论了二维材料中体光伏效应取得的研究进展, 包括单一成分二维材料、二维材料堆垛工程(如二维材料同质结和异质结), 以及在此基础上通过外界作用(如磁场、应变工程)实现产生或调控体光伏效应响应. 最后对二维体光伏效应的发展前景进行了展望.

     

    The bulk photovoltaic effect is a second-order nonlinear photoelectric response, which refers to a phenomenon that non-centrosymmetric structural material generates a steady-state photocurrent under uniform light irradiation. The bulk photovoltaic effect has attracted widespread attention due to its open-circuit voltage is not limited by the semiconductor bandgap and power conversion efficiency breaks through the Shockley-Queisser limit. In addition, the bulk photovoltaic effect is closely related to the quantum geometric properties (such as Berry curvature and quantum metric) of solids, thus making it an effective means to study crystal polarization, orbital magnetization, and quantum Hall effects. Two-dimensional (2D) materials are rich in electrical, optical, magnetic, topological properties and their interactions, which can effectively improve the performances of bulk photovoltaic devices (such as expanding response range of bulk photovoltaic effect) and have important research value for exploring basic physical problems. This paper reviews the development process of bulk photovoltaic effect and its physical mechanism. The research progress of bulk photovoltaic effect in 2D materials is discussed in detail, including single component 2D materials, 2D material stacking engineering (such as 2D material homojunctions and heterojunctions), and other factors (such as magnetic field, strain engineering) to generate or regulate the bulk photovoltaic effect response. Finally, the development prospect of two-dimensional bulk photovoltaic effect is prospected.

     

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