J-aggregated merocyanine non-fullerene acceptors for organic solar cells

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2025-07-02 DOI:10.1016/j.dyepig.2025.113008

Yibin Li , Xin Liu , Xianglang Sun , Yaxin He , Jiangsheng Yu , Zhong'an Li

引用次数: 0

Abstract

Two dimerized merocyanine-based non-fullerene acceptors (Z3 and Z4) with different molecular shapes are synthesized by tuning the central bridge unit. The fluorene-bridged Z3 cannot form a well-defined molecular shape due to small energy differences between different molecular conformations, whereas the indeno[1,2-b]fluorene-bridged Z4 adopts a single, well-defined S-shaped conformation. Both acceptors exhibit J-aggregation behavior in the film state, but only Z4 forms more ordered J-aggregates upon thermal annealing in the blend film, which not only improves molecular packing and charge transport, but also results in a new red-shifted absorption peak at 670 nm. This therefore significantly increases the photocurrent and overall device performance of the resulting organic solar cells.

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有机太阳能电池用j聚集merocyanine非富勒烯受体

通过调节中心桥单元，合成了两种不同分子形状的二聚体merocyanine- non-fullerene受体Z3和Z4。由于不同分子构象之间的能量差很小，芴桥接的Z3不能形成一个明确的分子形状，而茚二酮[1,2-b]芴桥接的Z4则是一个单一的、明确的s形构象。两种受体在膜态下均表现出j聚集行为，但只有Z4在共混膜中经过热处理形成了更有序的j聚集，这不仅改善了分子的堆积和电荷的输运，而且在670 nm处形成了新的红移吸收峰。因此，这显着增加了光电流和所得有机太阳能电池的整体器件性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.