BaTiO3/p-GaN/Au self-driven UV photodetector with bipolar photocurrent controlled by ferroelectric polarization

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外文摘要：Ferroelectric materials are promising candidates for ultraviolet photodetectors due to their ferroelectric effect.In this work,a BaTiO3/p-GaN/Au hybrid heterojunction-Schottky self-driven ultraviolet photodetector was fabricated with excellent bipolar photoresponse property.At 0 V bias,the direction of the photocurrent can be switched by flipping the depolarization field of BaTiO3,which allows the performance of photodetectors to be controlled by the ferroelectric effect.Meanwhile,a relatively large responsivity and a fast response speed can be also observed.In particular,when the depolarization field of BaTiO3 is in the same direction of the built-in electric field of the Au/p-GaN Schottky junction(up polarized state),the photodetector exhibits a high responsivity of 18 mA/W at 360 nm,and a fast response speed of＜40 ms at 0 V.These findings pave a new way for the preparation of high-performance photodetectors with bipolar photocurrents.

外文关键词：

ferroelectric effectbipolarself-drivenphotodetector

作者：

韩无双、刘可为、杨佳霖、朱勇学、程祯、陈星、李炳辉、刘雷、申德振

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作者单位：

State Key Laboratory of Luminescence and Applications,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China

Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China

基金：

国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金Youth Innovation Promotion Association,Chinese Academy of SciencesJilin Province Science FundJilin Province Science FundJilin Province Young and Middle-Aged Science and Technology Innovation Leaders and Team Project

项目编号：

620741486187519411727902122044741230411112304112202022520220101053JC20210101145JC20220508153RC

出版年：

2024

DOI：

10.1088/1674-1056/ad2607

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

年,卷(期)：2024.33(4)

参考文献量41