Flexible Self-Powered ZnO Film UV Sensor with a High Response

Qi Xu; Li Cheng; Leixin Meng; Zhe Wang; Suo Bai; Xiaoqiang Tian; Xiaofeng Jia; Yong Qin

doi:10.1021/acsami.9b09264

Flexible Self-Powered ZnO Film UV Sensor with a High Response

ACS Appl Mater Interfaces. 2019 Jul 24;11(29):26127-26133. doi: 10.1021/acsami.9b09264. Epub 2019 Jul 8.

Authors

Qi Xu^{1

2}, Li Cheng³, Leixin Meng¹, Zhe Wang⁴, Suo Bai¹, Xiaoqiang Tian¹, Xiaofeng Jia¹, Yong Qin¹

Affiliations

¹ Institute of Nanoscience and Nanotechnology, School of Physical Science and Technology , Lanzhou University , Lanzhou 730000 , China.
² School of Advanced Materials and Nanotechnology , Xidian University , Xi'an 710071 , China.
³ Zhongyuan University of Technology , Zhengzhou , Henan 450007 , China.
⁴ School of Electrical and Electronic Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 , Singapore.

PMID: 31241297
DOI: 10.1021/acsami.9b09264

Abstract

Response (on/off ratio) is one of the key parameters of ultraviolet (UV) sensors. In this paper, a kind of highly sensitive ZnO UV sensor with highly increased on/off current ratio was designed and developed. Under a weak UV intensity of 0.1 mW/cm², this ultrathin ZnO film-based UV sensor has an on/off current ratio of 1.3 × 10⁶ which is 3 times higher than the record value for ZnO-based UV sensors. In addition, it shows good flexibility and stable UV detection property during the bending process. When bending the sensor to a radius of curvature of about 18.5 mm, the sensor also shows high UV detection performance.

Keywords: UV sensor; ZnO film; flexible nanodevice; high response; self-powered nanodevice.