Nature Communications (Feb 2017)

Abnormal strong burn-in degradation of highly efficient polymer solar cells caused by spinodal donor-acceptor demixing

  • Ning Li,
  • José Darío Perea,
  • Thaer Kassar,
  • Moses Richter,
  • Thomas Heumueller,
  • Gebhard J. Matt,
  • Yi Hou,
  • Nusret S. Güldal,
  • Haiwei Chen,
  • Shi Chen,
  • Stefan Langner,
  • Marvin Berlinghof,
  • Tobias Unruh,
  • Christoph J. Brabec

DOI
https://doi.org/10.1038/ncomms14541
Journal volume & issue
Vol. 8, no. 1
pp. 1 – 9

Abstract

Read online

Liet al. study degradation in organic photovoltaics from a morphological perspective. They find that donor and acceptor phases undergo excessive demixing via spinodal decomposition resulting in a reduction of charge generation. Demixing is due to the inherently low miscibility of both materials.