Wu, M.-C.M.-C.WuChen, W.-C.W.-C.ChenChan, S.-H.S.-H.ChanSu, W.-F.W.-F.SuWEI-FANG SU2018-09-102018-09-102018http://www.scopus.com/inward/record.url?eid=2-s2.0-85028713599&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/402174Perovskite solar cell is a novel photovoltaic technology with the superior progress in efficiency and the simple solution processes. Develop lead-free or lead-reduced perovskite materials is a significant concern for high-performance perovskite solar cell. Among the alkaline earth metals, the Sr 2+ and Ba 2+ are suitable for Pb 2+ replacement in perovskite film due to fitting Goldschmidt's tolerance factor. In this study, we adopted Ba-doped and Sr-doped perovskite structured materials with different doping levels, including 1.0, 5.0, and 10.0 mol%, to prepare perovskite solar cells. Both Ba-doped and Sr-doped perovskite structured materials have a related tendency in absorption behavior and surface morphology. At 10.0 mol% doping level, the power conversion efficiency (PCE) of Sr-doped perovskite solar cells is only ∼0.5%, but the PCE of Ba-doped perovskite solar cells can be achieved to ∼9.7%. Ba-doped perovskite solar cells showed the acceptable photovoltaic characteristics than Sr-doped perovskite solar cells. Ba dopant can partially replace the amount of lead in the perovskite solar cells, and it could be a potential candidate in the field of lead-free or lead-reduced perovskite energy materials. © 2017 Elsevier B.V.Barium; Charge carrier dynamics; Perovskite solar cells; Power conversion efficiency; Strontium[SDGs]SDG7Barium; Conversion efficiency; Perovskite; Perovskite solar cells; Photovoltaic effects; Semiconductor doping; Solar power generation; Strontium; Absorption behaviors; Charge carrier dynamics; Energy materials; Photovoltaic applications; Photovoltaic characteristics; Photovoltaic technology; Power conversion efficiencies; Structured materials; Solar cellsjournal article10.1016/j.apsusc.2017.08.131