2, Arizona State University, Tempe, Arizona, United States
3, African University of Science and Technology (AUST), Abuja, , Nigeria
4, African University of Science and Technology (AUST), Abuja, , Nigeria
This paper presents a new hole transportation layer (HTL) combined with PEDOT:PSS and Copper doped Nickel Oxide (Cu:NiOx) in Perovskite-based solar cells (SCs). Thin films of Cu:NiOx are prepared on Fluorine doped Tin Oxide (FTO) glass substrates using a solution containing Nickel acetate tetrahydrate, 2-Methoxyethanol and Monoethanolamine (MEA) and Copper acetate monohydrate. After that PEDOTPSS are prepared on Cu:NiOx forming the composite hole transportation layer. The organic-inorganic CH3NH3PbI3 active layer derived from Pb-acetate based solution, [6,6]-phenyl C61-butyric acid methyl ester, and Al electrode are subsequently deposited, forming the inverted planar SC. Results indicate that PCE values higher than 10% can be realized using this low-temperature anneal process. Effects of anneal temperature and solution concentration on the properties of the SC are elucidated. The stability of the SC based on PEDOT/NiOx composite HTL are explored and compared to the stability of SC using single PEDOT HTL.