Mapping Nonfullerene Acceptors with a Novel Wide Bandgap Polymer for High Performance Polymer Solar Cells

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

8 Scopus Citations
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Author(s)

  • Xunfan Liao
  • Zhaoyang Yao
  • Ke Gao
  • Xueliang Shi
  • Lijian Zuo
  • Lie Chen
  • Feng Liu
  • Yiwang Chen

Detail(s)

Original languageEnglish
Article number1801214
Journal / PublicationAdvanced Energy Materials
Volume8
Issue number24
Early online date25 Jun 2018
Publication statusPublished - 27 Aug 2018

Abstract

A new weak electron-deficient building block, bis(2-ethylhexyl) 2,5-bis(5-bromothiophen-2-yl) thieno[3,2-b]thiophene-3,6-dicarboxylate (TT-Th), is incorporated to construct a wide-bandgap (1.88 eV) polymer PBDT-TT for nonfullerene polymer solar cells (NF-PSCs). PBDT-TT possesses suitable energy levels and complementary absorption when blended with both ITIC analogues (ITIC and IT-M) and a near-infrared (NIR) acceptor (6TIC). Moreover, PBDT-TT exhibits good conjugated planarity and preferable face-on orientation in the blended thin film, which are beneficial for charge transfer and carrier transport. The PSCs based on PBDT-TT:IT-M and PBDT-TT:6TIC blend films yield high power conversion efficiencies of 11.38% and 11.03%, respectively. To the best of the authors' knowledge, the PCE of 11.03% for PBDT-TT:6TIC-based device is one of the highest values reported for NIR NF-PSCs. This work demonstrates that TT-Th is a useful new electron-accepting building block for making p-type wide bandgap polymers for efficient NIR NF-PSCs.

Research Area(s)

  • high performance, NIR nonfullerene acceptors, polymer solar cells, wide bandgap polymers

Citation Format(s)

Mapping Nonfullerene Acceptors with a Novel Wide Bandgap Polymer for High Performance Polymer Solar Cells. / Liao, Xunfan; Yao, Zhaoyang; Gao, Ke; Shi, Xueliang; Zuo, Lijian; Zhu, Zonglong; Chen, Lie; Liu, Feng; Chen, Yiwang; Jen, Alex K.-Y.

In: Advanced Energy Materials, Vol. 8, No. 24, 1801214, 27.08.2018.

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