Alternating current photovoltaic effect

被引：0
|
作者：
Zhu L. [1 ]
Zou H. [2 ]
Wang Z. [1 ,3 ]
机构：
[1] Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing
[2] School of Materials Science and Engineering, Sichuan University, Chengdu
[3] School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta
来源：
Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica | 2023年 / 53卷 / 06期
关键词：
alternating current; heterojunction; non-equilibrium state; photovoltaic; quasi-Fermi level;
D O I：
10.1360/SST-2023-0021
中图分类号：
学科分类号：
摘要：
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. © 2023 Chinese Academy of Sciences. All rights reserved.
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页码：949 / 952
页数：3
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