Preparation and properties of ZnO-based ultraviolet photodetectors

Hao Liu; Junhong Yang

doi:10.1117/12.2658687

18 October 2022 Preparation and properties of ZnO-based ultraviolet photodetectors

Hao Liu, Junhong Yang

Proceedings Volume 12349, International Conference on Agri-Photonics and Smart Agricultural Sensing Technologies (ICASAST 2022); 123490L (2022) https://doi.org/10.1117/12.2658687
Event: International Conference on Agri-Photonics and Smart Agricultural Sensing Technologies (ICASAST 2022), 2022, Zhengzhou, China

Abstract

Semiconductor UV photodetectors are widely used in civil, military and commercial applications. It has attracted great research interest in recent years. Due to its excellent optical and electrical properties, ZnO has broad application prospects in the field of ultraviolet photodetectors. The optoelectronic properties of single materials are often limited, and composite structures can improve the shortcomings of single materials. In this paper, ZnS materials were composited on ZnO by vacuum vulcanization. The photoelectric properties of PECC UV photodetectors with ZnS/ZnO composite structure as photoanode were also analyzed. The results show that the open-circuit voltage VOC of the UV photodetector with this structure is 0.6 V, the short-circuit current ISC is 5.63 μA, the sensitivity is 401, which is much higher than that of the pure ZnO nanorod array of 119.7, and the responsivity is also increased from 2.81 A/ W increased to 9.38 A/W. The increase in the photoresponse current is attributed to the type II heterostructure formed by the composite, while the slower photoresponse is because the electronic effective mass of the composite structure is larger than that of ZnO with oxygen vacancy defects.

Citation Download Citation

Hao Liu and Junhong Yang "Preparation and properties of ZnO-based ultraviolet photodetectors", Proc. SPIE 12349, International Conference on Agri-Photonics and Smart Agricultural Sensing Technologies (ICASAST 2022), 123490L (18 October 2022); https://doi.org/10.1117/12.2658687

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KEYWORDS

Zinc oxide

Ultraviolet radiation

Photodetectors

Composites

Glasses

Transparent conductors

Luminescence

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