Improved performance of polymer solar cells by using inorganic, organic, and doped cathode buffer layers
Wang Taohong1, Chen Changbo1, Guo Kunping2, Chen Guo2, †, 
, Xu Tao2, 3, ‡, , Wei Bin2
, Xu Tao2, 3, ‡, , Wei Bin2 Atomic force microscopy topographic and 3D images of P3HT:PCBM blend films on ITO/PEDOT:PSS substrate (a) without CBL, (b) with Cs2CO3 CBL, (c) with Bphen CBL, and (d) with Bphen:Cs2CO3 CBL. The scan size is 4 μm×4 μm.
