Highly Polarization-Sensitive, Broadband, Self-Powered Photodetector Based on Graphene/PdSe2 /Germanium Heterojunction

ACS Nano
Di WuJiansheng Jie

Abstract

Polarization-sensitive photodetection in a broad spectrum range is highly desired due to the great significance in military and civilian applications. Palladium diselenide (PdSe2), a newly explored air-stable, group 10 two-dimensional (2D) noble metal dichalcogenide with a puckered pentagonal structure, holds promise for polarization-sensitive photodetection. Herein, we report a highly polarization-sensitive, broadband, self-powered photodetector based on graphene/PdSe2/germanium heterojunction. Owing to the enhanced light absorption of the mixed-dimensional van der Waals heterojunction and the effective carrier collection with graphene transparent electrode, the photodetector exhibits superior device performance in terms of a large photoresponsivity, a high specific detectivity, a fast response speed to follow nanosecond pulsed light signal, and a broadband photosensitivity ranging from deep ultraviolet (DUV) to mid-infrared (MIR). Significantly, highly polarization-sensitive broadband photodetection with an ultrahigh polarization sensitivity of 112.2 is achieved, which represents the best result for 2D layered material-based photodetectors. Further, we demonstrated the high-resolution polarization imaging based on the heteroj...Continue Reading

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Citations

Feb 28, 2020·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Ye ZhangHan Zhang
Mar 1, 2020·International Journal of Molecular Sciences·Shijie ZhangFei Xing
Feb 18, 2020·Angewandte Chemie·Roman KemptThomas Heine
Oct 9, 2020·Research : a Science Partner Journal·Ziwei LiAnlian Pan
Apr 3, 2021·Applied Optics·Haroon RashidMamun Ibne Reaz
Apr 7, 2021·Optics Express·Hao ZhouChuan Seng Tan
May 23, 2021·Advanced Science·Wen YangZhongming Wei
Mar 7, 2020·ACS Applied Materials & Interfaces·Guoqing TongYabing Qi
Dec 4, 2020·ACS Applied Materials & Interfaces·Guozhi HouKunji Chen
Aug 14, 2020·ACS Nano·Domenico De FazioFrank H L Koppens
Aug 31, 2021·ACS Applied Materials & Interfaces·Jae Eun SeoJiwon Chang
Oct 1, 2021·Scientific Reports·Leyla ShooshtariReza Rahighi
Nov 20, 2021·ACS Applied Materials & Interfaces·Pengzhi WangHui Zhao
Dec 2, 2021·ACS Applied Materials & Interfaces·Ruiheng ChangShun Wang

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