交流光伏效应  

Alternating current photovoltaic effect

作　　者：朱来攀 邹海洋 王中林[1,3] ZHU LaiPan;ZOU HaiYang;WANG ZhongLin(Beijing Institute of Nanoenergy and Nanosystems,Chinese Academy of Sciences,Bejing 101400,China;School of Materials Science and Engineering,Sichuan University,Chengdu 610064,China;School of Materials Science and Engineering,Georgia Institute of Technology,Atlanta 30332-0245,USA)

机构地区：[1]中国科学院北京纳米能源与系统研究所,北京100140 [2]四川大学材料科学与工程学院,成都610064 [3]佐治亚理工学院材料科学与工程学院,美国亚特兰大30332-0245

出　　处：《中国科学：技术科学》2023年第6期949-952,共4页Scientia Sinica(Technologica)

基　　金：国家自然科学基金(批准号:52192610,52192613)资助项目。

摘　　要：以p-n结为代表的传统光伏效应产生直流电.除了直流光伏效应,本文介绍了自然界还存在另一种新型的遵循麦克斯韦位移电流模型的光伏效应,该效应被命名为交流光伏效应.在该效应中,当光周期性地照射在两种材料的界面或结区时,邻近界面或结区的材料的准费米能级会发生相对移动和重新排列,为了平衡准费米能级移动造成的电势失衡,电子将通过外电路流动,从而产生交流电.高开关频率下的交流峰值光电流可以比来自普通光伏机制的光电流高得多.交流光伏效应不仅可以用于远程无线电源,还可为高灵敏的宽光谱检测提供一种新方法.该效应是王中林团队于2020年首次发现的.The traditional photovoltaic effect represented by p-n junctions generates direct current(DC).This paper proposes that in addition to the DC photovoltaic effect,there exists another new photovoltaic effect that follows the Maxwell displacement current model,which is named the alternating current(AC)photovoltaic effect.The effect is explained as follows:when light is periodically irradiated at the interface or junction of two semiconductor materials,the quasi-Fermi levels of the materials adjacent to the interface or junction will shift and rearrange relative to each other.To balance the potential imbalance caused by the shifting quasi-Fermi levels,electrons will flow through the external electric circuit to generate an AC.The peak AC photocurrent at high switching frequencies can be much higher than that from ordinary photovoltaic mechanisms.The AC photovoltaic effect can be used in remote wireless power supplies and allows for highly sensitive wide-spectrum detection.This effect was first discovered in 2020 by Zhong Lin Wang's group.

关 键 词：交流电 光伏 准费米能级 非平衡态 异质结 

分 类 号：TM615[电气工程—电力系统及自动化]