Fused selenophene-thieno[3,2-b]thiophene-selenophene (ST)-based narrow-bandgap electron acceptor for efficient organic solar cells with small voltage loss

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

3 Scopus Citations
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Author(s)

  • Xunfan Liao
  • Xueliang Shi
  • Ming Zhang
  • Ke Gao
  • Lijian Zuo
  • Feng Liu
  • Yiwang Chen

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)8258-8261
Journal / PublicationChemical Communications
Volume55
Issue number57
Online published12 Jun 2019
Publication statusPublished - 21 Jul 2019

Abstract

A novel near-infrared-light-absorbing fused-ring electron acceptor, STIC, was developed for organic solar cells. STIC exhibited a narrow bandgap with an absorption edge reaching 940 nm, which was ascribed to the strong electron-rich selenophene-thieno[3,2-b]thiophene-selenophene (ST) unit and strong intramolecular charge transfer of STIC. Also, STIC-based devices showed low open-circuit voltage (Voc) loss values, attributed to the rigid ST core providing low reorganization energy. The device based on the PBDB-T:STIC blend exhibited a power conversion efficiency (PCE) of 9.68% with a high short-circuit current density (Jsc) of 19.96 mA cm-2 and a low Voc loss of 0.55 eV.

Citation Format(s)

Fused selenophene-thieno[3,2-b]thiophene-selenophene (ST)-based narrow-bandgap electron acceptor for efficient organic solar cells with small voltage loss. / Liao, Xunfan; Shi, Xueliang; Zhang, Ming; Gao, Ke; Zuo, Lijian; Liu, Feng; Chen, Yiwang; Jen, Alex K.-Y.

In: Chemical Communications, Vol. 55, No. 57, 21.07.2019, p. 8258-8261.

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