Eco-Friendly Push-Coated Polymer Solar Cells with No Active Material Wastes Yield Power Conversion Efficiencies over 5.5

ACS Applied Materials & Interfaces
Shusei InabaVarun Vohra

Abstract

Push-coating is a simple process that can be employed for extremely low-cost polymer electronic device production. Here, we demonstrate its application to the fabrication of poly(2,7-carbazole- alt-dithienylbenzothiadiazole) (PCDTBT):[6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) active layers processed in air, yielding similar photovoltaic performances as thermally annealed spin-coated thin films when used in inverted polymer solar cells (PSCs). During push-coating, the polydimethylsiloxane layer temporarily traps the deposition solvent, resulting in simultaneous film formation and solvent annealing effect. This removes the necessity for a postdeposition thermal annealing step which is required for spin-coated PSCs to produce high photovoltaic performances. Optimized PSC active layers are produced with a push-coating time of 5 min at room temperature with 20 times less hazardous solvent and 40 times less active material than spin-coating. Annealed spin-coated active layers and active layers push-coated for 5 min both produce average power conversion efficiencies (PCEs) of 5.77%, while those push-coated for a shorter time of 1 min yield a slightly lower value of 5.59%. We demonstrate that, despite differences in their dono...Continue Reading

References

Sep 22, 2011·Advanced Materials·Minh Trung DangGuillaume Wantz
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Aug 11, 2018·Science·Lingxian MengYongsheng Chen
Sep 27, 2018·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Varun Vohra

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Citations

Nov 18, 2020·Physical Chemistry Chemical Physics : PCCP·Lucia GanzerTersilla Virgili
Jul 22, 2020·ACS Applied Materials & Interfaces·Bairu LiShangfeng Yang

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