Importance of structural hinderance in performance–stability equilibrium of organic photovoltaics

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

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Author(s)

  • Baobing Fan
  • Wei Gao
  • Xuanhao Wu
  • Xinxin Xia
  • Yue Wu
  • Francis R. Lin
  • Qunping Fan
  • Xinhui Lu
  • Wei Ma

Detail(s)

Original languageEnglish
Article number5946
Journal / PublicationNature Communications
Volume13
Online published8 Oct 2022
Publication statusPublished - 2022

Link(s)

Abstract

Power conversion efficiency and long-term stability are two critical metrics for evaluating the commercial potential of organic photovoltaics. Although the field has witnessed a rapid progress of efficiency towards 19%, the intrinsic trade-off between efficiency and stability is still a challenging issue for bulk-heterojunction cells due to the very delicate crystallization dynamics of organic species. Herein, we developed a class of non-fullerene acceptors with varied side groups as an alternative to aliphatic chains. Among them, the acceptors with conjugated side groups show larger side-group torsion and more twisted backbone, however, they can deliver an efficiency as high as 18.3% in xylene-processed cells, which is among the highest values reported for non-halogenated solvent processed cells. Meanwhile, decent thermal/photo stability is realized for these acceptors containing conjugated side groups. Through the investigation of the geometry-performance-stability relationship, we highlight the importance of side-group steric hinderance of acceptors in achieving combined high-performance, stable, and eco-friendly organic photovoltaics. © The Author(s) 2022.

Research Area(s)

Citation Format(s)

Importance of structural hinderance in performance–stability equilibrium of organic photovoltaics. / Fan, Baobing; Gao, Wei; Wu, Xuanhao et al.
In: Nature Communications, Vol. 13, 5946, 2022.

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

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