Ultraviolet irradiation dosimeter based on persistent photoconductivity effect of ZnO

doi:10.1088/1674-1056/ab8891

中国物理B ›› 2020, Vol. 29 ›› Issue (5): 58504-058504.doi: 10.1088/1674-1056/ab8891

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Ultraviolet irradiation dosimeter based on persistent photoconductivity effect of ZnO

Chao-Jun Wang(王朝骏), Xun Yang(杨珣), Jin-Hao Zang(臧金浩), Yan-Cheng Chen(陈彦成), Chao-Nan Lin(林超男), Zhong-Xia Liu(刘忠侠), Chong-Xin Shan(单崇新)

1 Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Materials Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China;
2 Key Laboratory of Materials Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China

收稿日期:2020-02-20 修回日期:2020-03-29 出版日期:2020-05-05 发布日期:2020-05-05
通讯作者: Xun Yang, Chong-Xin Shan E-mail:yangxun9013@163.com;cxshan@zzu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61804136, U1604263, and U1804155) and China Postdoctoral Science Foundation (Grant Nos. 2018M630829 and 2019T120630).

Ultraviolet irradiation dosimeter based on persistent photoconductivity effect of ZnO

Chao-Jun Wang(王朝骏)^1,2, Xun Yang(杨珣)^1,2, Jin-Hao Zang(臧金浩)^1,2, Yan-Cheng Chen(陈彦成)^1,2, Chao-Nan Lin(林超男)^1,2, Zhong-Xia Liu(刘忠侠)², Chong-Xin Shan(单崇新)^1,2

1 Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Materials Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China;
2 Key Laboratory of Materials Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China

Received:2020-02-20 Revised:2020-03-29 Online:2020-05-05 Published:2020-05-05
Contact: Xun Yang, Chong-Xin Shan E-mail:yangxun9013@163.com;cxshan@zzu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61804136, U1604263, and U1804155) and China Postdoctoral Science Foundation (Grant Nos. 2018M630829 and 2019T120630).

摘要/Abstract

摘要： It is essential to determine the accumulative ultraviolet (UV) irradiation over a period of time in some cases, such as monitoring UV irradiation to the skin, solar disinfection of water, photoresist exposure, etc. UV colorimetric dosimeters, which use dyes' color change to monitor the amount of UV exposure, have been widely studied. However, the exposure data of these UV colorimetric dosimeters can hardly be converted to digital signals, limiting their applications. In this paper, a UV dosimeter has been proposed and demonstrated based on the persistent photoconductivity (PPC) in zinc oxide microwires (ZnO MWs). The PPC effect usually results in high photoconductivity gain but low response speed, which has been regarded as a disadvantage for photodetectors. However, in this work, the unique characteristics of the PPC effect have been utilized to monitoring the accumulative exposure. We demonstrate that the photocurrent in the ZnO MWs depends on the accumulative UV exposure due to the PPC effect, thus the photocurrent can be utilized to determine the UV accumulation. The dosimeter is immune to visible light and exhibits a photoconductive gain of 2654, and the relative error of the dosimeter is about 10%. This UV dosimeter with electrical output is reusable and convenient to integrate with other electronic devices and may also open a new application area for the PPC effect.

关键词: dosimetry, persistent photoconductivity, photodetectors, ultraviolet

Abstract: It is essential to determine the accumulative ultraviolet (UV) irradiation over a period of time in some cases, such as monitoring UV irradiation to the skin, solar disinfection of water, photoresist exposure, etc. UV colorimetric dosimeters, which use dyes' color change to monitor the amount of UV exposure, have been widely studied. However, the exposure data of these UV colorimetric dosimeters can hardly be converted to digital signals, limiting their applications. In this paper, a UV dosimeter has been proposed and demonstrated based on the persistent photoconductivity (PPC) in zinc oxide microwires (ZnO MWs). The PPC effect usually results in high photoconductivity gain but low response speed, which has been regarded as a disadvantage for photodetectors. However, in this work, the unique characteristics of the PPC effect have been utilized to monitoring the accumulative exposure. We demonstrate that the photocurrent in the ZnO MWs depends on the accumulative UV exposure due to the PPC effect, thus the photocurrent can be utilized to determine the UV accumulation. The dosimeter is immune to visible light and exhibits a photoconductive gain of 2654, and the relative error of the dosimeter is about 10%. This UV dosimeter with electrical output is reusable and convenient to integrate with other electronic devices and may also open a new application area for the PPC effect.

Key words: dosimetry, persistent photoconductivity, photodetectors, ultraviolet

中图分类号: (Photodetectors (including infrared and CCD detectors))

85.60.Gz

42.79.Pw (Imaging detectors and sensors) 61.72.uj (III-V and II-VI semiconductors)

王朝骏, 杨珣, 臧金浩, 陈彦成, 林超男, 刘忠侠, 单崇新. Ultraviolet irradiation dosimeter based on persistent photoconductivity effect of ZnO[J]. 中国物理B, 2020, 29(5): 58504-058504.

Chao-Jun Wang(王朝骏), Xun Yang(杨珣), Jin-Hao Zang(臧金浩), Yan-Cheng Chen(陈彦成), Chao-Nan Lin(林超男), Zhong-Xia Liu(刘忠侠), Chong-Xin Shan(单崇新). Ultraviolet irradiation dosimeter based on persistent photoconductivity effect of ZnO[J]. Chin. Phys. B, 2020, 29(5): 58504-058504.

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Ultraviolet irradiation dosimeter based on persistent photoconductivity effect of ZnO

Ultraviolet irradiation dosimeter based on persistent photoconductivity effect of ZnO

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