“…For the past few years hydrogenated amorphous silicon (a-Si:H) thin films have been the subject of extensive studies due to their efficient optical and electrical properties, which allow them to be used in a variety of fields, such as photovoltaic solar cells [1][2][3][4], large area arrays of electronic devices [5], photosensors for the detection of bio-molecules [6,7], micro-electro-mechanical systems (MEMSs) [8,9], gas sensors [10,11], pixel detectors for high energy particles [12,13], optical imaging [14], photodetectors [15] and so on. Hydrogenated amorphous silicon thin films and its alloys are promising candidates for the realization of advanced opto-electronic devices.…”