电纺直写压电光电子型柔性光电探测器及其传感特性OA

Flexible photodetectors show considerable potential for wearable electronics,curved imaging,and intelligent sensing;however,their performance is frequently constrained by weak interfacial coupling between micro/nanoscale photoactive structures and flexible substrates,leading to high dark current and el-evated power consumption.Here,a performance-enhancement strategy exploiting the piezophototronic ef-fect is proposed.A dual-component self-assembled ZnO@(Cu(NH3))(CN)multilayer nanofiber architec-ture was fabricated via electrohydrodynamic direct writing,in which ZnO functions as the primary photoac-tive fiber and(Cu(NH3))(CN)serves as an auxiliary modulation layer.This stacked configuration mark-edly strengthens interfacial coupling stability and,through piezophototronic modulation at the stacking in-terfaces,introduces asymmetric barriers and built-in electric fields that effectively suppress thermally excit-ed carrier transport.As a result,the dark current is reduced to 1.12×10-7 A,substantially decreasing static power consumption.By adjusting the number of stacked layers(5-25),the threshold voltage can be tuned from 6 to 20 V,enabling programmable logic control.Under 254 nm ultraviolet illumination,a re-sponsivity of 13.3 A/W is achieved,with response and recovery times of 11 ms and 9 ms,respectively,demonstrating excellent photoelectric detection performance.These results indicate that the orthogonally stacked ZnO and(Cu(NH3))(CN)nanofiber architecture enables superior local electric-field regulation and enhanced photoelectric conversion efficiency,offering strong promise for low-power,high-response flexible photodetectors.