Self‐Powered UV Photodetector Array Based on P3HT/ZnO Nanowire Array Heterojunction

Abstract

AbstractSelf‐powered photodetector array based on organic–inorganic heterojunction is extremely suitable for light imaging applications, owing to their unique flexibility and stability. Here, a self‐powered ultraviolet (UV) photodetector based on p‐P3HT/n‐ZnO nanowire array heterojunction is demonstrated, which exhibits photoconductive gain of 4.2 × 10−4, responsivity of 125 µA W−1, specific detectivity of 3.7 × 107 Jones, and response/recovery speed of less than 100 ms at a low light intensity of 0.84 mW cm−2 for λ = 365 nm. The responsivity of this photodetector can be further enhanced by ≈21.9% under a temperature difference of −15.4 °C, owing to the thermo‐phototronic effect. Moreover, a photodetector array with 16 pixels is successfully demonstrated for light imaging of complex patterns, such as number‐shape and cross‐shape. This study provides a practical solution to achieve large‐scale UV imaging by integrating inorganic–organic hybrid photodetector into self‐powered array configuration.