@article{LangeKniepertPingeletal.2013,
  author    = {Ilja Lange and Juliane Kniepert and Patrick Pingel and Ines Dumsch and Sybille Allard and Silvia Janietz and Ullrich Scherf and Dieter Neher},
  title     = {Correlation between the open circuit voltage and the energetics of organic bulk heterojunction solar cells},
  journal   = {The journal of physical chemistry letters},
  volume    = {4},
  number    = {22},
  pages     = {3865 -- 3871},
  doi       = {10.1021/jz401971e},
  year      = {2013},
}