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A minimal non- radiative recombination loss for efficient non- fullerene all- small- molecule organic solar cells with a low energy loss of 0.54 eV and high open- circuit voltage of 1.15 V+
Yamagata Univ, Japan; Yamagata Univ, Japan.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
Yamagata Univ, Japan; Yamagata Univ, Japan; Yamagata Univ, Japan.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-2582-1740
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2018 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 6, no 28, p. 13918-13924Article in journal (Refereed) Published
Abstract [en]

Organic solar cells (OSCs) are considered as a promising next-generation photovoltaic technology because of their light weight, flexibility, and the potential of roll-to-roll fabrication. However, the relatively large energy loss (E-loss) from the optical bandgap (E-g) of the absorber to the open-circuit voltage (V-oc) of the device hinders further improvement of the PCEs of OSCs. Here, we report efficient non-fullerene all-small-molecule organic solar cells (NF all-SMOSCs), using DR3TBDTT and O-IDTBR as the donor and acceptor, respectively. We obtain a high electroluminescence yield (EQE(EL)) value of up to approximate to 4 x 10(-4) corresponding to a 0.21 eV non-radiative recombination loss, which is the smallest value for bulk-heterojunction (BHJ) OSCs so far. As a result, a low E-loss of 0.54 eV and a considerably high V-oc of 1.15 V are obtained for BHJ NF all-SMOSCs.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY , 2018. Vol. 6, no 28, p. 13918-13924
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URN: urn:nbn:se:liu:diva-150253DOI: 10.1039/c8ta04665dISI: 000439283200044OAI: oai:DiVA.org:liu-150253DiVA, id: diva2:1239794
Note

Funding Agencies|Japan Science and Technology Agency (JST); Ministry of Education, Culture, Sports, Science and Technology (MEXT) through Center of Innovation (COI) Program; Swedish Energy Agency (Energimyndigheten) [2016-010174]

Available from: 2018-08-17 Created: 2018-08-17 Last updated: 2018-09-06

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Wang, YumingGao, Feng
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