Haque F, Rahman MM, Al Mahmud MA, Reza MS, Akter M, Karim AZ. Chemically Converted Graphene as a Hole Transport Layer (HTL) Inorganic Photovoltaics (OPVS). Eng. int. (Dhaka). 2018;6(1):7-20. doi:10.18034/ei.v6i1.170