Ladder-Type Nonacyclic Arene Bis(thieno[3,2-b]thieno)cyclopentafluorene as a Promising Building Block for Non-Fullerene Acceptors

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

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Author(s)

  • Xiaobing Fan
  • Jianhong Gao
  • Wei Wang
  • Shengqiang Xiao
  • Chun Zhan
  • Xinhui Lu

Detail(s)

Original languageEnglish
Pages (from-to)1814-1822
Journal / PublicationChemistry - An Asian Journal
Volume14
Issue number10
Online published10 Dec 2018
Publication statusPublished - 15 May 2019
Externally publishedYes

Abstract

The ladder-type nonacyclic arene (bis(thieno[3,2-b]thieno)cyclopentafluorene (BTTF)) has been designed and synthesized through fusing thienothiophenes with the fluorene core from the synthon of dimethyl 9,9-dioctyl-2,7-bis(thieno[3,2-b]thiophen-2-yl)fluorene-3,6-dicarboxylate. With BTTF as the central donor unit, a novel acceptor–donor–acceptor (A-D-A) type non-fullerene small-molecule acceptor (BTTFIC) was prepared with 1,1-dicyanomethylene-3-indanones (IC) as the peripheral acceptor units. The energy level of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) of BTTFIC locate at −5.56 and −3.95 eV, respectively, presenting a low optical band gap of 1.58 eV. Encouragingly, polymer solar cells based on the blends of BTTFIC with both the representative wide- and low-bandgap polymer donors (PBDB-T, 1.82 eV. PTB7-Th, 1.58 eV) offer power conversion efficiencies over 8 % (8.78±0.18 % for PBDB-T:BTTFIC and 8.18±0.29 % for PTB7-Th:BTTFIC). These results highlight the advantage of ladder-type BTTF on the preparation of nonfullerene acceptors with extended conjugated backbones.

Research Area(s)

  • bulk heterojunctions, ladder-type arenes, non-fullerene acceptors, polycyclic aromatics, polymer solar cells

Citation Format(s)

Ladder-Type Nonacyclic Arene Bis(thieno[3,2-b]thieno)cyclopentafluorene as a Promising Building Block for Non-Fullerene Acceptors. / Fan, Xiaobing; Gao, Jianhong; Wang, Wei; Xiao, Shengqiang; Zhan, Chun; Lu, Xinhui; Zhang, Qichun.

In: Chemistry - An Asian Journal, Vol. 14, No. 10, 15.05.2019, p. 1814-1822.

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