A General Strategy for Ordered Carrier Transport of Quasi-2D and 3D Perovskite Films for Giant Self-Powered Photoresponse and Ultrahigh Stability

Fei Zhu; Gang Lian; Deliang Cui; Qilong Wang; Haohai Yu; Huaijin Zhang; Qingbo Meng; Ching-Ping Wong

doi:10.1007/s40820-023-01087-5

A General Strategy for Ordered Carrier Transport of Quasi-2D and 3D Perovskite Films for Giant Self-Powered Photoresponse and Ultrahigh Stability

Nanomicro Lett. 2023 Apr 30;15(1):115. doi: 10.1007/s40820-023-01087-5.

Authors

Fei Zhu¹, Gang Lian², Deliang Cui¹, Qilong Wang³, Haohai Yu⁴, Huaijin Zhang¹, Qingbo Meng^{5

6}, Ching-Ping Wong⁷

Affiliations

¹ State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, People's Republic of China.
² State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, People's Republic of China. liangang@sdu.edu.cn.
³ Key Laboratory for Special Functional Aggregated Materials of Education Ministry, School of Chemistry & Chemical Engineering, Shandong University, Jinan, 250100, People's Republic of China.
⁴ State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, People's Republic of China. haohaiyu@sdu.edu.cn.
⁵ Key Laboratory for Renewable Energy, Chinese Academy of Sciences (CAS), Beijing, People's Republic of China.
⁶ Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, CAS, Beijing, 100190, People's Republic of China.
⁷ School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA. cp.wong@mse.gatech.edu.

Abstract

Organic-inorganic hybrid perovskite materials have been focusing more attention in the field of self-powered photodetectors due to their superb photoelectric properties. However, a universal growth approach is required and challenging to realize vertically oriented growth and grain boundary fusion of 2D and 3D perovskite grains to promote ordered carrier transport, which determines superior photoresponse and high stability. Herein, a general thermal-pressed (TP) strategy is designed to solve the above issues, achieving uniaxial orientation and single-grain penetration along the film thickness direction. It constructs the efficient channel for ordered carrier transport between two electrodes. Combining of the improved crystal quality and lower trap-state density, the quasi-2D and 3D perovskite-based self-powered photodetector devices (with/without hole transport layer) all exhibit giant and stable photoresponse in a wide spectrum range and specific wavelength laser. For the MAPbI₃-based self-powered photodetectors, the largest R_λ value is as high as 0.57 A W^-1 at 760 nm, which is larger than most reported results. Meanwhile, under laser illumination (532 nm), the FPEA₂MA₄Pb₅I₁₆-based device exhibits a high responsivity (0.4 A W^-1) value, which is one of the best results in 2DRP self-powered photodetectors. In addition, fast response, ultralow detection limit, and markedly improved humidity, optical and heat stabilities are clearly demonstrated for these TP-based devices.

Keywords: Perovskites; Self-powered photodetectors; Stability; Thermal-pressed strategy; Uniaxial orientation.