“…Indium (III) sulfide (In 2 S 3 ), an indium chalcogenide, is a III-VI semiconductor compound important for optoelectronic (Cansizoglu et al, 2010;Mughal et al, 2015), photoelectric (Ho, 2011), and photovoltaic (PV) applications Haleem et al, 2012 due to its stable chemical composition (Newell et al, 2011;Strausser et al, 1995), photoconductivity (Gilles et al, 1962), and luminescent characteristics (Springford, 1963) at ambient conditions. It functions as an n-type semiconductor with an optical bandgap of 2.1-2.3 eV Dutta et al, 2007); however, there is still controversy about whether it is has a direct or indirect bandgap.…”