Spraying Perovskite Intermediate Enabling Inch-Scale Microwire Film Fabrication for Integration Compatible Efficient-Photodetectors Array

摘要

Metal halide perovskite microwires (MWs) have emerged as promisingphotoactive materials for highly efficient photodetectors (PDs). However,large-scale MWs film fabrication is still a formidable challenge for achievingintegration compatible perovskite PDs arrays, owing to precipitation andstructure crushing of MWs during deposition and annealing. Herein, astrategy of fabrication of inch-scale perovskite MWs films is presented bydepositing perovskite intermediate suspension through spray-coating, whichaddresses the trade-off present between the high flatness of MWs film andits large-scale fabrication. The single crystalline perovskite MWs weave a filmwith high enough flatness rendering narrow performance distribution of highefficiency on the 7 × 7 PDs arrays. The formamidinium lead iodide (FAPbI_3)PDs arrays show average responsivity and detectivity of (1.60 ± 0.46) A W~(?1)and (1.49 ± 0.50) × 10~(12) Jones. The methanaminium lead iodide (MAPbI_3) PDsarrays show average responsivity and detectivity of (0.065 ± 0.046) A W~(?1) and(2.54 ± 0.77) × 10~(11) Jones. The champion PDs based on FAPbI_3 MWs film andMAPbI_3 MWs film show detectivity of 1.26 × 10~(13) and 9.67 × 10~(11) Jones, whichare much higher than that of corresponding polycrystalline films and locatedon the top ranking of similar devices.