Unraveling the impacts of intermolecular interaction on morphology evolution for highly efficient organic solar cells and modules

IF 10.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Science China Chemistry Pub Date : 2024-10-28 DOI:10.1007/s11426-024-2272-3

Xueqing Ma, Yingying Cheng, Yuqiang Liu, Xinming Zheng, Guangliu Ran, Hongxiang Li, Xinyue Cui, Andong Zhang, Wenkai Zhang, Pei Cheng, Wenchao Huang, Zhishan Bo

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引用次数: 0

Abstract

Understanding the effect of intermolecular interaction on the growth dynamic of active layers is critical for advancing organic solar cells (OSCs). However, the diverse structure of donors and acceptors makes the research challenging. Additives with customizable structures and properties could simplify this complexity. Herein, we meticulously tailor two additives of 3,4-ethylenedioxythiophene (EDOT) and 2,5-dibromo-3,4-ethylenedioxythiophene (DBEDOT), possessing distinct intermolecular interaction features to elaborate the inherent relationship. It is found that varied interaction strengths can alter film formation processes. The enhanced intermolecular interaction between the DBEDOT and non-fullerene acceptor BTP-eC9-4F results in pre-aggregation and longer crystallization duration of BTP-eC9-4F, facilitating the formation of films with compact molecular packing and decent phase separation. Thus, exciton dissociation and charge transport become more efficient. Finally, devices processed with DBEDOT exhibit a remarkable power conversion efficiency of 19.35% in small-area OSCs and 14.11% in blade-coated 5 cm × 5 cm organic solar mini-modules. Especially, OSCs can maintain 80% of their initial efficiency after continuous annealing at 85 °C for over 2,100 h.

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来源期刊

Science China Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

14.40

自引率

7.30%

发文量

3787

审稿时长

2.2 months

期刊介绍： Science China Chemistry, co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China and published by Science China Press, publishes high-quality original research in both basic and applied chemistry. Indexed by Science Citation Index, it is a premier academic journal in the field. Categories of articles include: Highlights. Brief summaries and scholarly comments on recent research achievements in any field of chemistry. Perspectives. Concise reports on thelatest chemistry trends of interest to scientists worldwide, including discussions of research breakthroughs and interpretations of important science and funding policies. Reviews. In-depth summaries of representative results and achievements of the past 5–10 years in selected topics based on or closely related to the research expertise of the authors, providing a thorough assessment of the significance, current status, and future research directions of the field.