High-performance self-powered GaN/PEDOT:PSS hybrid heterojunction UV photodetector for optical communication

LI Shan ¹LIU Zeng ¹ZHANG MaoLin ¹YANG LiLi ¹GUO YuFeng ¹TANG WeiHua¹

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作者信息

1. College of Integrated Circuit Science and Engineering & National and Local Joint Engineering Laboratory for RF Integration and Micro-Packing Technologies,Nanjing University of Posts and Telecommunications,Nanjing 210023,China
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Abstract

Self-powered ultraviolet photodetectors(UVPDs)provide great possibility for the next-generation energy conservation optical communication technology;while the high photodetection performance at zero bias is still a tremendous challenge.Herein,n-type GaN film with Si-doping concentration of～1018 cm-3 and p-type organic PEDOT:PSS were adopted to construct a planar hybrid heterojunction via the simple spin-coating method.Profited from typical type-Ⅱ energy band alignment and giant photovoltaic effect at GaN/PEDOT:PSS inorganic-organic interface,the fabricated UVPD achieved excellent self-powered photoelectrical properties in dual-band with large R of 0.96 A/W(2.8 A/W),superior D* of 5.7× 1012 Jones(1.7×1013 Jones),prominent EQE of 325％(1371％),high on/off ratio of 9.65× 103(6.15x103)and fast rise/decay time of 60.7/124.5 ms(30.9/26.7 ms)for UVA(UVC)band,as well as outstanding UV/visible rejection ratio and great detection repeatability.Functioned as an optical signal receiver,this designed self-powered UVPD decoded a message of"NJUPT"from a simple optical communication system.These results open a new avenue for GaN/PEDOT:PSS heterojunction in UV communications and related applications.

Key words

GaN/UV photodetector/self-powered/heterojunction/optical communication

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基金项目

National Key Research and Development Program of China(2022YFB3605404)

Joint Funds of the National Natural Science Foundation of China(U23A20349)

National Natural Science Foundation of China(62305171)

Natural Science Foundation of Jiangsu Province(BK20230361)

Natural Science Foundation of Jiangsu Higher Education Institutions(23KJB510017)

Natural Science Research Startup Foundation of Recruiting Talents of NJUPT(XK1180922062)

Natural Science Research Startup Foundation of Recruiting Talents of NJUPT(XK1060921002)

出版年

2024

中国科学:技术科学(英文版)

中国科学院

中国科学:技术科学(英文版)

CSTPCDEI

影响因子：1.056

ISSN：1674-7321

参考文献量42

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