In-Situ Piezoelectric Effect for Augmenting Performance of Self-Powered ZnO-Based Photodetector

In this study, an in-situ piezoelectric effect is integrated into a photoactive region to develop self-powered ultraviolet photodetector based on p-n junction of ZnO@Polyvinylidene fluoride (PVDF) and poly [9,9-dioctylfluorene-co-N-[4-(3-methylpropyl)]-diphenylamine] (TFB). A ZnO@β-PVDF nanocomposite fabricated using PVDF with the β-phase as polymer matrix ZnO nanoparticles fillers. The strong piezoelectricity β-PVDF can facilitate separation transport photogenerated electrons in depletion area considerably reduce dark current when device polarized external bias, resulting improvement on/off ratio detectivity. Under 365-nm UV illumination, as-fabricated exhibits high detectivity 4.99 × 1011 Jones, excellent (up 2.75 104), fast response speed 46/53 ms (rise/fall times). functions stably over approximately 1000 continuous cycles extremely long-lasting photostability exposed light. findings demonstrate promising strategy for enhancing performance photodetectors industrial applications.