Highly Efficient and Reproducible Nonfullerene Solar Cells from Hydrocarbon Solvents

Andrew Wadsworth, Raja Ashraf, Maged Abdelsamie, Sebastian Pont, Mark S. Little, Maximilian Moser, Zeinab Hamid, Marios Neophytou, Weimin Zhang, Aram Amassian, James R. Durrant, Derya Baran, Iain McCulloch

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

With chlorinated solvents unlikely to be permitted for use in solution-processed organic solar cells in industry, there must be a focus on developing nonchlorinated solvent systems. Here we report high-efficiency devices utilizing a low-bandgap donor polymer (PffBT4T-2DT) and a nonfullerene acceptor (EH-IDTBR) from hydrocarbon solvents and without using additives. When mesitylene was used as the solvent, rather than chlorobenzene, an improved power conversion efficiency (11.1%) was achieved without the need for pre- or post-treatments. Despite altering the processing conditions to environmentally friendly solvents and room-temperature coating, grazing incident X-ray measurements confirmed that active layers processed from hydrocarbon solvents retained the robust nanomorphology obtained with hot-processed chlorinated solvents. The main advantages of hydrocarbon solvent-processed devices, besides the improved efficiencies, were the reproducibility and storage lifetime of devices. Mesitylene devices showed better reproducibility and shelf life up to 4000 h with PCE dropping by only 8% of its initial value.
Original languageEnglish (US)
Pages (from-to)1494-1500
Number of pages7
JournalACS Energy Letters
Volume2
Issue number7
DOIs
StatePublished - Jun 5 2017

Fingerprint Dive into the research topics of 'Highly Efficient and Reproducible Nonfullerene Solar Cells from Hydrocarbon Solvents'. Together they form a unique fingerprint.

Cite this