PDI Derivative through Fine-Tuning the Molecular Structure for Fullerene-Free Organic Solar Cells

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Hua Sun
  • Xin Song
  • Jian Xie
  • Po Sun
  • Peiyang Gu
  • Changmei Liu
  • Fei Chen
  • Zhi-Kuan Chen
  • Wei Huang

Detail(s)

Original languageEnglish
Pages (from-to)29924-29931
Journal / PublicationACS Applied Materials and Interfaces
Volume9
Issue number35
Online published10 Aug 2017
Publication statusPublished - 6 Sep 2017
Externally publishedYes

Abstract

A perylenediimide-based (PDI-based) small molecular (SM) acceptor with both an extended π-conjugation and a three-dimensional structure concurrently is critical for achieving high-performance PDI-based fullerene-free organic solar cells (OSCs). Herein, a novel PDI-based SM acceptor has been successfully synthesized through fusing PDI units with a spiro core 4,4′-spirobi[cyclopenta[2,1-b;3,4-b′]dithiophene (SCPDT) together via β-position coupling with thiophene bridges. An enhanced absorption from 350 to 520 nm has been observed. Moreover, compared with previously reported acceptor SCPDT-PDI4, in which the PDI units and SCPDT are not fused together, the LUMO energy level of FSP (the new SCPDT-based molecule) increases. OSCs containing PTB7-Th as a donor and FSP as an acceptor have been demonstrated to show an excellent performance with a power conversion efficiency as high as 8.89%. This result might be attributed to the efficient and complementary photoabsorption, balanced carrier mobilities, and favorable phase separation in the blend film. This research could offer an effective strategy to design novel high-performance PDI-based acceptors.

Research Area(s)

  • 3D structure, nonfullerene acceptor, organic solar cells, perylenediimide, power conversion efficiency, small molecules

Citation Format(s)

PDI Derivative through Fine-Tuning the Molecular Structure for Fullerene-Free Organic Solar Cells. / Sun, Hua; Song, Xin; Xie, Jian; Sun, Po; Gu, Peiyang; Liu, Changmei; Chen, Fei; Zhang, Qichun; Chen, Zhi-Kuan; Huang, Wei.

In: ACS Applied Materials and Interfaces, Vol. 9, No. 35, 06.09.2017, p. 29924-29931.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review