Improved performance of polymer solar cells by using inorganic, organic, and doped cathode buffer layers

Wang Taohong¹, Chen Changbo¹, Guo Kunping², Chen Guo^{2, †,}, Xu Tao^{2, 3, ‡,}, Wei Bin²

Comparison of (a) the J–V characteristics under 100 mW/cm² illumination of AM1.5G solar spectrum, and (b) the EQE spectra of the P3HT:PCBM devices with various inorganic CBLs with that of the P3HT:PCBM device without a CBL.