Bulk photovoltaic effect in two-dimensional ferroelectricα-In_(2)Se_(3)  

作　　者：Huiting WANG Shuaiqin WU Yan CHEN Qianru ZHAO Jinhua ZENG Ruotong YIN Yuqing ZHENG Chang LIU Shukui ZHANG Tie LIN Hong SHEN Xiangjian MENG Jun GE Xudong WANG Junhao CHU Jianlu WANG 

机构地区：[1]State Key Laboratory of Infrared Physics,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception,Institute of Optoelectronics,Fudan University,Shanghai 200433,China [4]Frontier Institute of Chip and System,Fudan University,Shanghai 200433,China [5]Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China

出　　处：《Science China(Information Sciences)》2025年第2期281-288,共8页中国科学(信息科学)(英文版)

基　　金：supported by Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB0580000);Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB44000000);Hundred Talents Program of the Chinese Academy of Sciences;National Natural Science Foundation of China(Grant Nos.62075228,62025405,62222413,62105100,62334001);China National Postdoctoral Program for Innovative Talents(Grant No.BX20230392);China Postdoctoral Science Foundation(Grant Nos.2023M730621,2023M743651);Shanghai Post-doctoral Excellence Program(Grant No.2022103);Natural Science Foundation of Shanghai(Grant No.23ZR1473400)。

摘　　要：Non-centrosymmetric material systems can generate spontaneous photocurrent without a p-n junction under uniform illumination,which is known as the bulk photovoltaic effect(BPVE).It has garnered significant attention for its application potential in the fields of energy harvesting and photoelectric detection.In this study,we report the BPVE observed in twodimensional ferroelectricα-In_(2)Se_(3) multilayer flakes.The reversal in spontaneous photocurrent polarity is observed and associated with the out-of-plane ferroelectric polarization direction.The spontaneous photocurrent originating from the shift current is also polarization-sensitive.The amplitude of spontaneous photocurrent is further increased by one order of magnitude through vacuum annealing.Our results provide a further application potential for new-generation photodetectors based on BPVE with low power consumption and multi-dimensional optoelectronic detection.

关 键 词：bulk photovoltaic effect 2D ferroelectrics 3Rα-In_(2)Se_(3) shift current self-powered photodetection 

分 类 号：TB34[一般工业技术—材料科学与工程]