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A molecular nematic liquid crystalline material for high-performance organic photovoltaics
Open accessAbstract
Solution-processed organic photovoltaic cells (OPVs) hold great promise to enable roll-to-roll printing of environmentally friendly, mechanically flexible and cost-effective photovoltaic devices. Nevertheless, many high-performing systems show best power conversion efficiencies (PCEs) with a thin active layer (thickness is ~100 nm) that is difficult to translate to roll-to-roll processing with high reproducibility. Here we report a new molecular donor, benzodithiophene terthiophene rhodanine (BTR), which exhibits good processability, nematic liquid crystalline behaviour and excellent optoelectronic properties. A maximum PCE of 9.3% is achieved under AM 1.5G solar irradiation, with fill factor reaching 77%, rarely achieved in solution-processed OPVs. Particularly promising is the fact that BTR-based devices with active layer thicknesses up to 400 nm can still afford high fill factor of ~70% and high PCE of ~8%. Together, the results suggest, with better device architectures for longer device lifetime, BTR is an ideal candidate for mass production of OPVs.
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Metadata
- Authors
- Sun, K., Xiao, Z., Lu, S., Zajaczkowski, W., Pisula, W., Hanssen, E., White, J. M., Williamson, R. M., Subbiah, J., Ouyang, J., Holmes, A. B., Wong, W. W. H., & Jones, D. J.
- Venue
- Nature Communications
- Published
- 2015-01-14
- Volume
- 6
- Issue
- 1
- Pages
- 6013-6013
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W2085915663
- Cited by
- 630
- References
- 41
- FWCI
- 49.88
- Type
- journal article
- Language
- en
- Open access
- gold
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