@article{PhuongHosseiniSandbergetal.2020,
  author    = {Le Quang Phuong and Seyed Mehrdad Hosseini and Oskar J. Sandberg and Yingping Zou and Han Young Woo and Dieter Neher and Safa Shoaee},
  title     = {Quantifying quasi-fermi level splitting and open-circuit voltage losses in highly efficient nonfullerene organic solar cells},
  journal   = {Solar RRL},
  volume    = {5},
  number    = {1},
  doi       = {10.1002/solr.202000649},
  year      = {2020},
}