Solution-processed flexible broadband ZnO photodetector modified by Ag nanoparticles

• Flexible broadband photodetector with ZnO film on polyimide (PI) substrate studied. Silver nanoparticles were applied to obtain photosensitive material ZnO_Ag/PI. High spectral responsivity of ZnO_Ag/PI in UV–Vis-NIR spectra obtained. External quantum efficiency is from 1?10 2 9?10 4 %. Specific detectivity up 8.6?10 13 Jones allows recognize a weak light signal. In this work, we present flexible photodetectors (PDs) fabricated by deposition nanostructured zinc oxide (ZnO) films substrates using cheap and scalable aqueous method Successive Ionic Layer Adsorption Reaction (SILAR). order increase the long-wavelength absorption layer, created its intrinsic defects, including oxygen vacancies post-treatment at 300 °C vacuum thus light-sensitive ZnO/PI was Then silver (Ag NPs) sol onto film, which visualized SEM form spheres 100 nm size that increased photocurrent figures merit obtained due localized surface plasmon resonance double Schottky barriers Ag-ZnO interface. To fabricate based photoconductive effect, these materials equipped ohmic aluminum contacts. The ( R ? 275 A/W UV light) solution-processed different wavelengths power densities better than photodetector, least an magnitude higher described recent articles. external EQE ) both PDs study very high range % or same as data modern high-sensitivity heterostructures containing ZnO. specific large for (from 3.5?10 10 12 Jones) especially 1.6?10 11 Jones), indicates ability