Efficient fully blade-coated perovskite solar cells in air with nanometer-thick bathocuproine buffer layer

• 作者: Sergio Castro-Hermosa Luana Wouk Izabela Silva Bicalho Luiza de Queiroz Corrêa Bas de Jong Lucio Cinà Thomas M.Brown Diego Bagnis
• 来源期刊: 纳米研究（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: Research Articles
• 页码范围: 1034-1042
• 页数: 9页
• 语种: 英文

摘要

Fully printed perovskite solar cells (PSCs) were fabricated in air with all constituent layers,except for electrodes,deposited by the blade coating technique.The PSCs incorporated,for the first time,a nanometer-thick printed bathocuproine (BCP) hole blocking buffer using blade coating and deposited at relative humidity up to 50％.The PSCs with a p-i-n structure (glass/indium tin oxide(ITO)/poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS)/CH3NH3PbI3/6,6]-phenyl-C61-butyric acid methyl ester(PCBM)/BCP/Ag) delivered a maximum power conversion efficiency (PCE) of 14.9％ on an active area of 0.5 cm2 when measured under standard test conditions.The PSCs with a blade coated BCP delivered performance of 10％ and 63％ higher (in relative terms) than those incorporating a spin coated BCP or without any BCP film,respectively.The atomic force microscopy (AFM) showed that blade coated films were more homogeneous and acted also as a surface planarizer leading to a reduction of roughness which improved BCP/Ag interface Iowering charge recombination.The demonstration of 15％ efficient devices with all constituent layers,including nenometer-thick BCP (～ 10 nm),deposited by blade coating in air,demonstrates a route for industrialization of this technology.