Multi-Selenophene-Containing Narrow Bandgap Polymer Acceptors for All-Polymer Solar Cells with over 15% Efficiency and High Reproducibility

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

7 Scopus Citations
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Author(s)

  • Qunping Fan
  • Huiting Fu
  • Qiang Wu
  • Ziang Wu
  • Francis Lin
  • Jie Min
  • Han Young Woo

Detail(s)

Original languageEnglish
Pages (from-to)15935-15943
Journal / PublicationAngewandte Chemie - International Edition
Volume60
Issue number29
Online published3 May 2021
Publication statusPublished - 12 Jul 2021

Abstract

All-polymer solar cells (all-PSCs) progressed tremendously due to recent advances in polymerized small molecule acceptors (PSMAs), and their power conversion efficiencies (PCEs) have exceeded 15%. However, the practical applications of all-PSCs are still restricted by a lack of PSMAs with a broad absorption, high electron mobility, low energy loss, and good batch-to-batch reproducibility. A multi-selenophene-containing PSMA, PFY-3Se, was developed based on a selenophene-fused SMA framework and a selenophene π-spacer. Compared to its thiophene analogue PFY-0Se, PFY-3Se shows a ≈30 nm red-shifted absorption, increased electron mobility, and improved intermolecular interaction. In all-PSCs, PFY-3Se achieved an impressive PCE of 15.1% with both high short-circuit current density of 23.6 mA cm−2 and high fill factor of 0.737, and a low energy loss, which are among the best values in all-PSCs reported to date and much better than PFY-0Se (PCE=13.0%). Notably, PFY-3Se maintains similarly good batch-to-batch properties for realizing reproducible device performance, which is the first reported and also very rare for the PSMAs. Moreover, the PFY-3Se-based all-PSCs show low dependence of PCE on device area (0.045–1.0 cm2) and active layer thickness (110–250 nm), indicating the great potential toward practical applications.

Research Area(s)

  • all-polymer solar cells, batch-to-batch insensitivity, narrow band gap polymer acceptors, power conversion efficiencies, selenophene

Citation Format(s)

Multi-Selenophene-Containing Narrow Bandgap Polymer Acceptors for All-Polymer Solar Cells with over 15% Efficiency and High Reproducibility. / Fan, Qunping; Fu, Huiting; Wu, Qiang; Wu, Ziang; Lin, Francis; Zhu, Zonglong; Min, Jie; Woo, Han Young; Jen, Alex K.-Y.

In: Angewandte Chemie - International Edition, Vol. 60, No. 29, 12.07.2021, p. 15935-15943.

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