Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 96, Issue 1, Pages 112-116Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2011.09.027
Keywords
Organic solar cells; Low band gap; Absorbance spectra; Crystallization; External quantum efficiency
Funding
- UK Engineering and Physical Sciences Research Council [F061757]
- EPSRC-NPL [EP/G062056/1]
- EPSRC [EP/F061757/1, EP/G062056/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F061757/1, EP/G062056/1] Funding Source: researchfish
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We report a series of fused pyrrolo[3,2-d:4,5-d']bisthiazole (PBTz)-containing polymers as OPV donor materials, which exhibit a combination of small optical band gap, good solubility and relatively high molecular weight. The performance of the organic photovoltaic cells (OPV) made using the PBTz-containing polymers is studied. The highest performance was obtained with the polymer exhibiting the strongest crystallinity in the blend film, a PBTz-fused bithiophene polymer. Blend devices made from this polymer with PC70BM delivered a short-circuit current density of up to 9.4 mA cm(-2), an open-circuit voltage of 0.61 V. a fill factor of 53% and a power conversion efficiency of 3%. (C) 2011 Elsevier B.V. All rights reserved.
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