Flexible self-powered manganese doped zinc oxide nanorod and perovskite quasi-solid state UV-photodetector with excellent stability and high performance

Flexible, self-powered, and fast-responsive photoelectrochemical photodetector (PEC-PD) devices are needed in optoelectronic applications. Although the PD devices constructed from heterojunction of zinc oxide (ZnO) and inorganic halide perovskite (CsPbBr3)-type perovskite displayed astonishing performance in the field, the sensitivity of the perovskite layer to environmental conditions restricts the wide application. Herein, we present a study for the preparation of a wide light spectrum (367-499 nm) sensitive PEC-PD devices built from the heterostructure of Mn-doped ZnO nanorod (ZnONR) and CsPbBr3 on both rigid and flexible substrates using ionic conductive polymer electrolyte. The PEC-PD performance parameters of the self-powered PEC-PD device such as responsivity (R), Detectivity (D*), and sensitivity (S%) have been calculated as 95.12 mAW-1, 2.83x1012 Jones and 8.04x106%, respectively. In addition to these parameters, the fast light response for rise/decay time (tau rise/ tau decay) which is an important parameter for PD applications was (10.62 ms/42.9 ms) observed. The resulting PEC-PD device demonstrated durability over 2500 cycles under simulated sunlight and upon 500 bending cycles at different angles.