@article {6785,
	title = {Self-powered photodetector with improved and broadband multispectral photoresponsivity based on ZnO-ZnS composite},
	journal = {Journal of Alloys and Compounds },
	volume = {859},
	year = {2021},
	abstract = {
	Cost-effective multispectral\&nbsp;photodetectors\&nbsp;(PDs) exhibiting a high\&nbsp;UV-Visible-NIR\&nbsp;photoresponse offer an avenue for developing environmental monitoring devices, imaging sensors, object discrimination, and optical links. However,\&nbsp;PDs\&nbsp;based on a single semiconductor as light-sensitive layer are unable to provide broadband photodetection properties. In this work, a new\&nbsp;PD\&nbsp;device based on\&nbsp;ZnO-ZnS\&nbsp;Microstructured Composite (MC) which achieves a high\&nbsp;UV-Visible-NIR\&nbsp;photoresponse is demonstrated. The\&nbsp;ZnO-ZnS MC\&nbsp;is elaborated by combining vacuum thermal evaporation technique and a suitable annealing process. Scanning Electron Microscopy (SEM), energy-dispersive\&nbsp;X-ray spectroscopy (EDS),\&nbsp;X-ray diffraction (XRD), and\&nbsp;UV-Vis-NIR\&nbsp;spectroscopy were used to elucidate the morphological, structural and optical properties of the prepared sample. It was demonstrated that the\&nbsp;ZnO-ZnS MC\&nbsp;can be useful to enhance the visible absorbance efficiency by promoting efficient light-scattering effects. It is revealed that the prepared\&nbsp;UV-Vis-NIR PD\&nbsp;offers a low dark current of\&nbsp;5\&nbsp;nA, a high\&nbsp;ION/IOFF\&nbsp;ratio of\&nbsp;78\&nbsp;dB\&nbsp;and an enhanced responsivity in\&nbsp;UV, visible and\&nbsp;NIR\&nbsp;ranges. The proposed multispectral\&nbsp;PD\&nbsp;demonstrates a high\&nbsp;ION/IOFF\&nbsp;current ratio under self-powered working regime. Therefore, the proposed\&nbsp;ZnO-ZnS MC\&nbsp;is believed to provide new insights in developing efficient, self-powered and low-cost multispectral\&nbsp;PDs\&nbsp;for high-performance optoelectronic systems.




},
	url = {https://www.sciencedirect.com/science/article/abs/pii/S0925838820346053},
	author = {Benyahia, Kaddour and Fay{\c c}al Djeffal and Hichem Ferhati and Bendjerad, Adel and Benhaya Abdelhamid and A Saidi}
}
