Local Structure-Induced Selective Interactions Enables High-Performance and Burn-in-Free Organic Photovoltaics

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

2 Scopus Citations
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Author(s)

  • Baobing Fan
  • Huanhuan Gao
  • Liyang Yu
  • Ruipeng Li
  • Lei Wang
  • Wenkai Zhong
  • Wenlin Jiang
  • Huiting Fu
  • Tianqi Chen
  • Bin Kan

Detail(s)

Original languageEnglish
Article numbere202418439
Journal / PublicationAngewandte Chemie - International Edition
Volume64
Issue number6
Online published30 Oct 2024
Publication statusPublished - 3 Feb 2025

Abstract

Oligomeric acceptors (OAs) have attracted considerable attention in the organic photovoltaics (OPV) field owing to their capacity in balancing the merits from both monomeric and polymeric acceptors. A delicate control over the distortion between blocks of OAs usually determines the performance and stability of relevant OPV devices. However, it imposes great complexity to realize a controllable degree of distortion by tuning the skeleton of blocks and the position of linker between blocks. Herein, we developed a facile strategy to rationally control the geometry distortion of OAs via a straightforward substitution of alkoxy side-chains on their blocks. This helps elucidate the integrated influences of molecular distortion and non-bonded contacts on the selective interactions between OA molecules and between OA and host acceptor in ternary blend. We demonstrate the alkoxy-OA molecules having stronger self-interactions would mitigate their interactions with host acceptor, therefore alleviating the kinetic diffusion and excessive aggregation of total acceptors. Combining with a composite-interlayer strategy by introducing a phenyl-substituted self-assembled monolayer to enhance the doping with polyoxometalate, an impressive efficiency of 20.1 % is achieved accompanied by a negligible burn-in loss against physical aging. This study demonstrates the validation of tuning of selective interactions towards high-performance and burn-in-free OPV. © 2024 Wiley-VCH GmbH.

Research Area(s)

  • dimeric acceptor, geometry distortion, non-bonded contact, organic photovoltaic, selective interaction

Citation Format(s)

Local Structure-Induced Selective Interactions Enables High-Performance and Burn-in-Free Organic Photovoltaics. / Fan, Baobing; Gao, Huanhuan; Yu, Liyang et al.
In: Angewandte Chemie - International Edition, Vol. 64, No. 6, e202418439, 03.02.2025.

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