Donor polymer design enables efficient non-fullerene organic solar cells

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Zhengke Li
  • Guofang Yang
  • Joshua Yuk Lin Lai
  • Tingxuan Ma
  • Jingbo Zhao
  • Wei Ma
  • He Yan

Detail(s)

Original languageEnglish
Article number13094
Number of pages9
Journal / PublicationNature Communications
Volume7
Online published26 Oct 2016
Publication statusPublished - 2016
Externally publishedYes

Link(s)

Abstract

To achieve efficient organic solar cells, the design of suitable donor-acceptor couples is crucially important. State-of-the-art donor polymers used in fullerene cells may not perform well when they are combined with non-fullerene acceptors, thus new donor polymers need to be developed. Here we report non-fullerene organic solar cells with efficiencies up to 10.9%, enabled by a novel donor polymer that exhibits strong temperature-dependent aggregation but with intentionally reduced polymer crystallinity due to the introduction of a less symmetric monomer unit. Our comparative study shows that an analogue polymer with a C2 symmetric monomer unit yields highly crystalline polymer films but less efficient non-fullerene cells. Based on a monomer with a mirror symmetry, our best donor polymer exhibits reduced crystallinity, yet such a polymer matches better with small molecular acceptors. This study provides important insights to the design of donor polymers for non-fullerene organic solar cells.

Research Area(s)

  • POWER-CONVERSION EFFICIENCY, ELECTRON-ACCEPTORS, PHOTOVOLTAIC CELLS, MOLECULAR-ORIENTATION, PERFORMANCE, RECOMBINATION, VOLTAGE, CHAINS

Citation Format(s)

Donor polymer design enables efficient non-fullerene organic solar cells. / Li, Zhengke; Jiang, Kui; Yang, Guofang et al.
In: Nature Communications, Vol. 7, 13094, 2016.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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