Abstract
In this article, we report the enhanced UV photo-detection property of solution processed poly(vinyledene fluoride) (PVDF) membranes filled with zinc oxide (ZnO) nanoparticles at varying concentration. Microstructural analysis confirms β-crystalline phase formation. PVDF/ZnO membranes show increased photo-current compared to pristine PVDF, under UV (λ∼365 nm, 8.3 μW/cm2) irradiation, with PVDF/10% ZnO achieving 4.34 μA photo-current and 6 second response time at 10 V bias. Under mechanical stress in form of bending, UV photocurrent of the composite is enhanced significantly as a result of piezo-phototronic effect. Impedance spectra show significant variations under UV, revealing modifications in grain-boundary interfaces with ZnO and UV, and bending affecting electrical response, confirming the piezo-phototronic effect.
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