Enhanced Photoresponsivity From Hybrid-ZnO Nanowires With White LED 400–700-nm Illumination

This paper highlights the photoresponsivity property of a hybrid-ZnO nanowire (ZnO NW) photodetector to a white LED source with a wavelength range of 400-700 nm. The use of methanol via the vapor phase transport method was utilized to achieve the incorporation of carbon and oxygen particles with Zn to form hybrid-ZnO NWs. Field emission scanning electron microscope, X-ray diffraction, and Raman scattering techniques were used in the identification of morphology, polycrystalline structure, and D-, G-, and 2-D bands, respectively. Positive photoresponsivity and negative photoresponsivity of the hybrid-ZnO NWs were studied with the LED distances 1-4 cm from the hybrid-ZnO NWs for varied bias voltage from 1 to 4 V. A reproducible photoresponsivity with response times ranging from 182 to 345 μs was measured using an oscilloscope. The proposed technique demonstrates the great potential possessed by hybrid-ZnO NWs in optoelectronic applications in the near future.