Guan, Shuo; Ning, YunHao; Chen, Hongda; Huang, Beiju; Zhang, Bao; Cheng, Chuantong Source: Journal of Materials Chemistry C, 2024;

Abstract:

Crystal engineering based on the additive passivation of defects in perovskite crystals is vital for improving crystal quality and tuning the optoelectronic properties of perovskites. Doping metal-organic framework materials (MOFs) into halide perovskites is one of the emerging methods to improve the optoelectronic properties of perovskites. Herein, a simple and effective method to dope metal-organic framework nanoparticles into organic-inorganic halide perovskite MAPbI3 films is proposed. Zeolite imidazole framework-8 (ZIF-8) nanoparticles can be uniformly dispersed in MAPbI3 perovskite films. ZIF-8 nanoparticles can effectively passivate the defects in the MAPbI3 perovskite layer, and the crystalline quality of the perovskite films is improved after doping with ZIF-8. Meanwhile, planar conductive photodetectors and photodetector arrays were prepared with perovskite films. A two-fold increase was observed in the photocurrent and photoresponsivity of photodetectors doped with ZIF-8, and the detectivity reached 8.01 × 10 Jones. The photodetectors maintained long-term operation and environmental stability and could run at 1.2 V bias for 230 s without attenuation, retaining 90% of the initial photoresponsivity after being stored at 30-35 °C (R.H. 40%) for 14 days. In addition, we prepared perovskite photodetector arrays. The prepared 10 × 10 photodetector array realizes the detection and signal transmission of image information.

© 2024 The Royal Society of Chemistry. (50 refs.)