Boosting Efficiency and Stability of Perovskite Solar Cells with CdS Inserted at TiO2/Perovskite Interface
Organic-inorganic hybrid perovskite solar cells have undergone an unprecedented development as the next-generation photovoltaic devices in recent years.The power conversion efficiency and stability are the key factors attracting great attentions from both academic and industrial communities.Here we insert a nonoxide CdS layer between TiO2 and perovskite to passivate the TiO2 interface in planar-type perovskite solar cells.After introducing the CdS layer,we observe significantly enhanced air stability and suppressed recombination between the trapped electrons and perovskite related with inverse transport.At the optimum CdS thickness,a champion power conversion efficiency of 14.26%is achieved compared with 10.31%for the reference CdS-free devices.This impressive efficiency also surpasses that of previously reported perovskite solar cells based on CdS.The largely improved performance is ascribed to the increased Fermi level of electron transport layer,more efficient charge transport and lower recombination rates.
Perovskite Solar cell Electron transport layer Passivation Stability
Yulong Ma Liang Li
College of Physics,Optoelectronics and Energy,Jiangsu Key Laboratory of Thin Films,Center for Energy Conversion Materials & Physics(CECMP),Soochow University,Suzhou 215006,P.R.China
国内会议
上海
英文
1-23
2016-11-04（万方平台首次上网日期，不代表论文的发表时间）