Piezo-phototronic effect promoted carrier separation in coaxial p-n junctions for self-powered photodetector

Abstract Sustainable and flexible photodetectors that simultaneously achieve sufficient responsivity and ultrafast speed is urgently needed to meet the booming of big data and portable electronics in our daily life. Herein, we demonstrate fiber-shaped photodetectors constructed by vertical organic-inorganic heterostructures, which achieves self-powered behavior and promoted photoresponse under series of coaxial p-n junctions and piezo-phototronic mechanism. Tunable photoresponse and ultrafast response and recovery (