Improvement of interfacial contacts for new small-molecule bulk-heterojunction organic photovoltaics

Andres Garcia, Gregory C. Welch, Erin L. Ratcliff, David S. Ginley, Guillermo C. Bazan, Dana C. Olson

Research output: Contribution to journalArticlepeer-review

138 Scopus citations


The influence of protonation reactions between poly(3,4- ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and a thiadiazolo[3,4-c]pyridine small-molecule donor are reported; these result in poor solar-cell performance due to a barrier for charge extraction. The use of a NiOx contact eliminates such deleterious chemical interactions and results in substantial improvements in open-circuit voltage, fill factor, and an increased power conversion efficiency from 2.3% to 5.1%.

Original languageEnglish (US)
Pages (from-to)5368-5373
Number of pages6
JournalAdvanced Materials
Issue number39
StatePublished - Oct 9 2012


  • Bulk-Heterojunction Organic Photovoltaics
  • Hole transport layer
  • Interfacial Chemistry
  • Organic Solar Cells
  • Small Molecules

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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