Highly Efficient and Reproducible Nonfullerene Solar Cells from Hydrocarbon Solvents
Highly efficient and reproducible non-fullerene solar cells from hydrocarbon solvents Manuscript Final Copy.pdf
Little, Mark S.
Durrant, James R.
KAUST DepartmentChemical Science Program
KAUST Solar Center (KSC)
Material Science and Engineering Program
Organic Electronics and Photovoltaics Group
Physical Science and Engineering (PSE) Division
Online Publication Date2017-06-05
Print Publication Date2017-07-14
Permanent link to this recordhttp://hdl.handle.net/10754/625072
MetadataShow full item record
AbstractWith 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.
CitationWadsworth A, Ashraf RS, Abdelsamie M, Pont S, Little M, et al. (2017) Highly Efficient and Reproducible Nonfullerene Solar Cells from Hydrocarbon Solvents. ACS Energy Letters: 1494–1500. Available: http://dx.doi.org/10.1021/acsenergylett.7b00390.
SponsorsThe authors thank KAUST for financial support, the Welsh Assembly Government Sêr Solar Project, and acknowledge EC FP7 Project SC2 (610115), EC H2020 (643791), and EPSRC Projects EP/G037515/1, EP/M005143/1, and EP/L016702/1.
PublisherAmerican Chemical Society (ACS)
JournalACS Energy Letters