A molecular nematic liquid crystalline material for high-performance organic photovoltaics
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Open Access
- 14 January 2015
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nature Communications
- Vol. 6 (1), 6013
- https://doi.org/10.1038/ncomms7013
Abstract
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.This publication has 47 references indexed in Scilit:
- Interface engineering of highly efficient perovskite solar cellsScience, 2014
- Highly Efficient 2D-Conjugated Benzodithiophene-Based Photovoltaic Polymer with Linear Alkylthio Side ChainChemistry of Materials, 2014
- Solution-processed small-molecule solar cells: breaking the 10% power conversion efficiencyScientific Reports, 2013
- Efficient planar heterojunction perovskite solar cells by vapour depositionNature, 2013
- Fullerene Derivative‐Doped Zinc Oxide Nanofilm as the Cathode of Inverted Polymer Solar Cells with Low‐Bandgap Polymer (PTB7‐Th) for High PerformanceAdvanced Materials, 2013
- Sequential deposition as a route to high-performance perovskite-sensitized solar cellsNature, 2013
- Enhanced power-conversion efficiency in polymer solar cells using an inverted device structureNature Photonics, 2012
- High-efficiency inverted dithienogermole–thienopyrrolodione-based polymer solar cellsNature Photonics, 2011
- Polymer solar cells with enhanced open-circuit voltage and efficiencyNature Photonics, 2009
- Polymer Photovoltaic Cells: Enhanced Efficiencies via a Network of Internal Donor-Acceptor HeterojunctionsScience, 1995