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It shows the strong dependence of the size, shape and thickness of the MoSe<jats:sub>2<\/jats:sub> layers on the processing parameters. The morphology of the samples was investigated by field emission scanning electron microscopy (FESEM) and the thickness of the deposited layers was determined by atomic force microscopy (AFM). Raman and photoluminescence (PL) spectroscopies were used to confirm the high quality of the MoSe<jats:sub>2<\/jats:sub> layers. Surface composition was examined by photoelectron spectroscopy (XPS). Moreover, the MoSe<jats:sub>2<\/jats:sub>\/SiO<jats:sub>x<\/jats:sub>\/Si heterojunctions exhibit diode behaviour, with a rectification ratio of 10, measured at \u00b12.0\u2009V, which is due to the p-i-n heterojunctions formed at the p-Si\/SiO<jats:sub>x<\/jats:sub>\/MoSe<jats:sub>2<\/jats:sub> interface. A photovoltaic effect was observed with a short circuit current density (<jats:italic>J<\/jats:italic><jats:sub><jats:italic>sc<\/jats:italic><\/jats:sub>), open circuit voltage (<jats:italic>V<\/jats:italic><jats:sub><jats:italic>OC<\/jats:italic><\/jats:sub>) and efficiency of \u22120.80\u2009mA\/cm<jats:sup>2<\/jats:sup>, 1.55\u2009V and 0.5%, respectively. These results provide a guide for the preparation of p-i-n heterojunctions based on few-layer MoSe<jats:sub>2<\/jats:sub> with improved photovoltaic response.<\/jats:p>","DOI":"10.1038\/s41598-020-58164-7","type":"journal-article","created":{"date-parts":[[2020,1,27]],"date-time":"2020-01-27T11:02:44Z","timestamp":1580122964000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Morphological, optical and photovoltaic characteristics of MoSe2\/SiOx\/Si heterojunctions"],"prefix":"10.1038","volume":"10","author":[{"given":"J. P. 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