Ultrasensitive UV Photodetector Based on Interfacial Charge-Controlled Inorganic Perovskite-Polymer Hybrid Structure

Dali Shao; Weiguang Zhu; Xueqing Liu; Mingxin Li; Jie Chen; Yi-Yang Sun; Guoqing Xin; Jie Lian; Shayla Sawyer

doi:10.1021/acsami.0c09890

Ultrasensitive UV Photodetector Based on Interfacial Charge-Controlled Inorganic Perovskite-Polymer Hybrid Structure

ACS Appl Mater Interfaces. 2020 Sep 23;12(38):43106-43114. doi: 10.1021/acsami.0c09890. Epub 2020 Sep 9.

Authors

Dali Shao¹, Weiguang Zhu², Xueqing Liu¹, Mingxin Li², Jie Chen³, Yi-Yang Sun³, Guoqing Xin⁴, Jie Lian², Shayla Sawyer¹

Affiliations

¹ Department of Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States.
² Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States.
³ State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 208199, China.
⁴ Wuhan National High Magnetic Field Center and School of Materials Science & Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.

PMID: 32852191
DOI: 10.1021/acsami.0c09890

Abstract

In this work, we demonstrate an ultrasensitive, visible-blind ultraviolet (UV) photodetector based on perovskite-polymer hybrid structure. A novel wide-band-gap vacancy-ordered lead-free inorganic perovskite Cs₂SnCl₆ with Nd³⁺ doping is employed in the active layer of this hybrid photodetector. Remarkably, with interfacial charge-controlled hole-injection operating mechanism, our device achieves a maximum detectivity of 6.3 × 10¹⁵ Jones at 372 nm, fast photoresponse speed with rise time and fall time in the order of milliseconds, and a large linear dynamic range of 118 dB. The performance is significantly better than most of the existing organic and inorganic semiconductor UV photodetectors reported so far, and its detectivity is close to 1 order of magnitude higher than that of the photomultiplication tube (PMT) in the UV region. In addition, the photodetector demonstrated excellent environmental stability, which is critical for commercial deployment of perovskite-based optoelectronic devices. The results presented in this work open a new route toward development of high-performance optoelectronic devices using perovskite-based hybrid nanomaterial systems.

Keywords: detectivity; inorganic perovskite; interfacial charge injection; noise current; polymer; ultraviolet photodetector.