Journal article
Morphology of a thermally stable small molecule OPV blend comprising a liquid crystalline donor and fullerene acceptor
AJ Bourque, S Engmann, A Fuster, CR Snyder, LJ Richter, PB Geraghty, DJ Jones
Journal of Materials Chemistry A | ROYAL SOC CHEMISTRY | Published : 2019
DOI: 10.1039/c9ta01989h
Abstract
Recently organic photovoltaic (OPV) devices comprising the small-molecule liquid-crystalline donor, benzodithiophene-quaterthiophene-rhodanine (BQR), and fullerene acceptor, [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM), were demonstrated to achieve high performance when thermally processed, avoiding the need for slow-drying solvent additives or complex solvent-vapor annealing post-processing. In this investigation we explore the impact of thermal processing on thin film blends of BQR and PC71BM using differential scanning calorimetry (DSC), in situ grazing incidence X-ray scattering (GISAXS, GIWAXS), and photoluminescence spectroscopy (PL) to correlate thermal behavior with morphologi..
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Awarded by National Science Foundation
Funding Acknowledgements
A. Bourque acknowledges support from the National Institute of Standards and Technology (NIST)/National Research Council (NRC) fellowship program. S. Engmann acknowledges support from the U.S. Department of Commerce, NIST under the financial assistance award 70NANB17H305. A. Fuster acknowledges support from the Montgomery College/NIST Internship program. D. Jones and P. Geraghty are funded by the Australian Centre for Advanced Photovoltaics through grants from the Australian Renewable Energy Agency. The authors would like to thank M. Heiber and A. Burns for helpful discussions in preparation of the manuscript. This work is based upon research conducted at the Cornell High Energy Synchrotron Source (CHESS) which is supported by the National Science Foundation under award DMR-1332208. Scattering data from CHESS was taken with the help of D. Smilgies.