However, when it comes to the unsubstituted PCDTBT:[6,6]-Phenyl-C71- Butyric Acid Methyl Ester (PC71BM), similar to P3HT:PC61BM active layers, Auger electron spectrwohsicloepaynnmeaelainsugrienmaeirnrtessruelvtseianl athPaCt BEMA--ddeepplleetteeddlalayyererast cthaen ibnetefrofaucned...