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Nano Research

Article Title

High-performance asymmetric electrodes photodiode based on Sb/WSe2 heterostructure

Authors

Xiao Liu, Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China
Guangzhuang Sun, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
Peng Chen, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
Junchi Liu, Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China
Zhengwei Zhang, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
Jia Li, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
Huifang Ma, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
Bei Zhao, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
Ruixia Wu, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
Weiqi Dang, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
Xiangdong Yang, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
Chen Dai, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
Xuwan Tang, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
Zhuojun Chen, Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China
Lili Miao, Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China
Xingqiang Liu, Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China
Bo Li, Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China
Yuan Liu, Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China
Xidong Duan, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China

Keywords

two-dimensional, asymmetric electrode, photodiode, vdW heterostructure, optoelectronics

Abstract

Two-dimensional (2D) van der Waals (vdWs) metal-semiconductor heterostructures with atomically sharp interface and matched work functions have recently attracted great attention due to their unique electronic and optoelectronic properties. Here we report the vapor phase epitaxial growth of large-scale vertical Sb/WSe2 metal-semiconductor vdWs heterostructures with uniform stacking orientation. Compared with the growth on SiO2/Si substrate, the thickness of Sb nanosheet on WSe2 can be reduced effectively to monolayer. We construct Sb-WSe2-Au asymmetric electrodes photodiode based on the Sb/WSe2 heterostructures. Electrical transport measurements indicate that the photodiode show obvious rectifying effect. Optoelectronic characterizations show prominent photoresponse with a high photoresposivity of 364 mA/W, a fast response time of less than 8 ms, a large open-circuit voltage of 0.27 V and a maximum electrical power output of 0.11 nW. The direct growth of high-quality metal-semiconductor vdWs heterostructures may open up new realms in 2D functional electronics and optoelectronics.

Graphical Abstract

Publisher

Tsinghua University Press

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