Ultrasensitive broadband phototransistors based on perovskite/organic-semiconductor vertical heterojunctions

Light, Science & Applications
Chao XieFeng Yan

Abstract

Organolead halide perovskites have emerged as the most promising materials for various optoelectronic devices, especially solar cells, because of their excellent optoelectronic properties. Here, we present the first report of low-voltage high-gain phototransistors based on perovskite/organic-semiconductor vertical heterojunctions, which show ultrahigh responsivities of ~109A W-1 and specific detectivities of ~1014 Jones in a broadband region from the ultraviolet to the near infrared. The high sensitivity of the devices is attributed to a pronounced photogating effect that is mainly due to the long carrier lifetimes and strong light absorption in the perovskite material. In addition, flexible perovskite photodetectors have been successfully prepared via a solution process and show high sensitivity as well as excellent flexibility and bending durability. The high performance and facile solution-based fabrication of the perovskite/organic-semiconductor phototransistors indicate their promise for potential application for ultrasensitive broadband photodetection.

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Citations

Nov 22, 2019·Nanotechnology·Jingying LiuQiaoliang Bao
Mar 3, 2020·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Yalong ShenHaibo Zeng
Sep 23, 2020·Advanced Materials·Vaishnavi KrishnamurthiSumeet Walia
Sep 12, 2019·Advanced Science·Chun-Ki LiuFeng Yan
May 17, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Xuejiao ChenDezhen Shen
Sep 1, 2018·Light, Science & Applications·Leilei Gu, Zhiyong Fan
Mar 21, 2020·Light, Science & Applications·Kai-Kai LiuChong-Xin Shan
Dec 25, 2019·Light, Science & Applications·Sung Bum KangKyoung Jin Choi
Oct 13, 2020·Light, Science & Applications·Jiayue HanJun Wang
Dec 12, 2020·Light, Science & Applications·Sung Bum KangKyoung Jin Choi
Mar 18, 2021·Light, Science & Applications·Kai-Kai LiuChong-Xin Shan
Jun 17, 2021·Physical Chemistry Chemical Physics : PCCP·K KondratenkoA Daoudi
Jun 30, 2021·The Journal of Physical Chemistry Letters·Li SongYongsheng Hu
Feb 22, 2018·The Journal of Physical Chemistry Letters·Zhi-Xiang ZhangYu-Cheng Wu

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Methods Mentioned

BETA
scanning electron microscopy
atomic force microscopy
X-ray
profiler

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