4.8 Article

Nonfullerene Polymer Solar Cells with 8.5% Efficiency Enabled by a New Highly Twisted Electron Acceptor Dimer

Journal

ADVANCED MATERIALS
Volume 28, Issue 1, Pages 124-+

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201503801

Keywords

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Funding

  1. NSF [CBET-1435912, DMR-1409687]
  2. Office of Naval Research (ONR) [N00014-11-1-0317]
  3. Directorate For Engineering
  4. Div Of Chem, Bioeng, Env, & Transp Sys [1435912] Funding Source: National Science Foundation
  5. Division Of Materials Research
  6. Direct For Mathematical & Physical Scien [1409687] Funding Source: National Science Foundation

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Fullerene-free and processing additive-free 8.5% efficient polymer solar cells are achieved by using a new 3,4-ethylene-dioxythiophene- linked arylene diimide dimer with a 76 degrees twist angle. The devices combine high (78-83%) external quantum efficiency with high (0.91-0.95 V) photovoltages and thus have relatively low optical bandgap energy loss.

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