High performance Cu2O film/ZnO nanowires self-powered photodetector by electrochemical deposition

doi:10.1088/1674-1056/aba610

Abstract Self-powered photodetectors based on nanomaterials have attracted lots of attention for several years due to their various advantages. In this paper, we report a high performance Cu₂O/ZnO self-powered photodetector fabricated by using electrochemical deposition. ZnO nanowires arrays grown on indium-tin-oxide glass are immersed in Cu₂O film to construct type-Ⅱ band structure. The Cu₂O/ZnO photodetector exhibits a responsivity of 0.288 mA/W at 596 nm without bias. Compared with Cu₂O photoconductive detector, the responsivity of the Cu₂O/ZnO self-powered photodetector is enhanced by about two times at 2 V bias. It is attributed to the high power conversion efficiency and the efficient separation of the photogenerated electron-hole pairs, which are provided by the heterojunction. The outstanding comprehensive performances make the Cu₂O film/ZnO nanowires self-powered photodetector have great potential applications.

Keywords: electrochemical deposition Cu₂O/ZnO self-powered photodetector responsivity

Received: 09 June 2020
Revised: 02 July 2020
Accepted manuscript online: 15 July 2020

PACS:	85.60.Dw	(Photodiodes; phototransistors; photoresistors)
	73.40.Lq	(Other semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61704011, 61674021, 11674038, 61574022, and 61904017) and the Innovation Foundation of Changchun University of Science and Technology (Grant No. XQNJJ-2018-18).

Corresponding Authors: Dengkui Wang, Dan Fang
E-mail: wccwss@foxmail.com;fangdan19822011@163.com

Cite this article:

Deshuang Guo(郭德双), Wei Li(李微), Dengkui Wang(王登魁), Bingheng Meng(孟兵恒), Dan Fang(房丹), Zhipeng Wei(魏志鹏) High performance Cu₂O film/ZnO nanowires self-powered photodetector by electrochemical deposition 2020 Chin. Phys. B 29 098504

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High performance Cu2O film/ZnO nanowires self-powered photodetector by electrochemical deposition

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High performance Cu₂O film/ZnO nanowires self-powered photodetector by electrochemical deposition