Dimer Acceptor Adopting a Flexible Linker for Efficient and Durable Organic Solar Cells

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Yanxun Li
  • Rui Zhang
  • Francis R. Lin
  • Kaikai Liu
  • Qunping Fan

Detail(s)

Original languageEnglish
Article numbere202303066
Journal / PublicationAngewandte Chemie - International Edition
Volume62
Issue number21
Online published22 Mar 2023
Publication statusPublished - 15 May 2023

Link(s)

Abstract

Organic solar cells (OSCs) have advanced rapidly due to the development of new photovoltaic materials. However, the long-term stability of OSCs still poses a severe challenge for their commercial deployment. To address this issue, a dimer acceptor (dT9TBO) with flexible linker is developed for incorporation into small-molecule acceptors to form molecular alloy with enhanced intermolecular packing and suppressed molecular diffusion to stabilize active layer morphology. Consequently, the PM6 : Y6 : dT9TBO-based device displays an improved power conversion efficiency (PCE) of 18.41 % with excellent thermal stability and negligible decay after being aged at 65 °C for 1800 h. Moreover, the PM6 : Y6 : dT9TBO-based flexible OSC also exhibits excellent mechanical durability, maintaining 95 % of its initial PCE after being bended repetitively for 1500 cycles. This work provides a simple and effective way to fine-tune the molecular packing with stabilized morphology to overcome the trade-off between OSC efficiency and stability. © 2023 Wiley-VCH GmbH.

Research Area(s)

  • Dimer Acceptor, Flexible Linker, Mechanical Performance, Solar Cells, Stability

Citation Format(s)

Dimer Acceptor Adopting a Flexible Linker for Efficient and Durable Organic Solar Cells. / Qi, Feng; Li, Yanxun; Zhang, Rui et al.
In: Angewandte Chemie - International Edition, Vol. 62, No. 21, e202303066, 15.05.2023.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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