%0 Journal Article %T Perovskite Self-Passivation with PCBM for Small Open-Circuit Voltage Loss %A Xinglin Zhu %A Xinyu Zhao %A Lei Li %A Yi Peng %A Wenwang Wei %A Xuan Zhang %A Mengwei Su %A Yukun Wang %A Ziqian Chen %A Wenhong Sun %J Energy and Power Engineering %P 257-272 %@ 1947-3818 %D 2020 %I Scientific Research Publishing %R 10.4236/epe.2020.126016 %X It is well known that [6,6]-phenyl-C₆₁-butyric acid methyl ester (PCBM) is a common n-type passivation material in PSCs, usually used as an interface modification layer. However, PCBM is extremely expensive and is not suitable for future industrialization. Herein, the various concentrations of PCBM as an additive are adopted for PSCs. It not only avoids the routine process of spin coating the multi-layer films, but also reduces the PCBM material and cost. Meanwhile, PCBM can passivate the grain surface and modulate morphology of perovskite films. Furthermore, the most important optical parameters of solar cells, the current density (J_sc), fill factor (FF), open-circuit voltage (V_oc) and power conversion efficiencies (PCE) were improved. Especially, when the PCBM doping ratio in CH₃NH₃PbI₃ (MAPbI₃) precursor solution was 1 wt%, the device obtained the smallest V_oc decay (less than 1%) in the p-i-n type PSCs with poly (3,4-ethylenedioxythiophene):poly (styrene sulfonate) (PEDOT:PSS) %K Self-Passivation %K Small Open-Circuit Voltage Loss %K PCBM %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=100844