Vinylene-Inserted Asymmetric Polymer Acceptor with Absorption Approaching 1000 nm for Versatile Applications in All-Polymer Solar Cells and Photomultiplication-Type Polymeric Photodetectors

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

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Author(s)

  • Qunping Fan
  • Huiting Fu
  • Ming Liu
  • Jiyeon Oh
  • Xiaoling Ma
  • Francis R. Lin
  • Changduk Yang
  • Fujun Zhang

Detail(s)

Original languageEnglish
Pages (from-to)26970-26977
Journal / PublicationACS Applied Materials & Interfaces
Volume14
Issue number23
Online published3 Jun 2022
Publication statusPublished - 15 Jun 2022

Abstract

The emerging polymerized small-molecule acceptors (PSMAs) with near-infrared (NIR) absorption have not only significantly boosted the power conversion efficiencies (PCEs) of all-polymer solar cells (all-PSCs) but have also exhibited great potential for sensitive NIR polymeric photodetectors (PPDs). However, there is no report regarding PSMAs with photo-response that can approach 1000 nm, which is an important criterion for applications in NIR-responsive all-PSCs and PPDs. Herein, by unidirectionally inserting vinylene segments into a selenophene-rich polymer backbone to improve the electron-donating strength and quinoidal character, an asymmetric PSMA, namely, PY3Se-1V, was developed, which showed an extensively red-shifted absorption approaching 1000 nm. The PBDB-T:PY3Se-1V-based binary all-PSCs achieve a decent PCE of 13.2% and a record-high photocurrent density of 25.9 mA cm-2 due to the significantly broadened photo-response and efficient photon-to-electron conversion. More encouragingly, narrowband photomultiplication (PM)-type PPDs based on poly(3-hexylthiophene-2,5-diyl) (P3HT):PY3Se-1V were developed, delivering an exceptionally high external quantum efficiency of 3680% and a responsivity of 28 A W-1 at an NIR peak of 960 nm under -50 V bias, which is reported for the first time in PM-type PPDs with a response approaching 1000 nm.

Research Area(s)

  • all-polymer solar cells, asymmetric polymer acceptors, near-infrared absorption, photomultiplication-type polymeric photodetectors, vinylene, 17-PERCENT EFFICIENCY

Citation Format(s)

Vinylene-Inserted Asymmetric Polymer Acceptor with Absorption Approaching 1000 nm for Versatile Applications in All-Polymer Solar Cells and Photomultiplication-Type Polymeric Photodetectors. / Fan, Qunping; Fu, Huiting; Liu, Ming; Oh, Jiyeon; Ma, Xiaoling; Lin, Francis R.; Yang, Changduk; Zhang, Fujun; Jen, Alex K-Y.

In: ACS Applied Materials & Interfaces, Vol. 14, No. 23, 15.06.2022, p. 26970-26977.

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