The impact of reabsorption effect on composition analysis of organic semiconductors

IF 6.8 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science China Materials Pub Date : 2024-07-31 DOI:10.1007/s40843-024-3015-2

Bei Yang (, ), Xiaoke Liu (, ), Li Wan (, ), Weixin Ni (, ), Ni Yang (, ), Jianhui Hou (, ), Feng Gao (, )

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引用次数: 0

Abstract

Reabsorption is one of the most fundamental optical phenomena, but it has rarely been considered in spectroscopy-based composition analysis for organic semiconductors. Here, we take four state-of-the-art organic solar cell (OSC) materials as examples, and systematically investigate the influence of reabsorption on photoluminescence emission and excitation spectra by both experimental studies and optical simulations. We find that the overlap between absorption and emission spectra of these OSC materials is strong enough for them to be affected by the reabsorption effect, and the effect becomes more obvious between different species in the multi-components systems. Moreover, three features of the reabsorption effect and the reabsorption strength are identified, with which we have successfully analyzed the composition in a range of OSC materials in both solution and solid-state films. Our work not only provides an important understanding of the largely overlooked feature of reabsorption in the widely used spectroscopic techniques but also offers an effective toolbox for the composition analysis of organic semiconductors.

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重吸收效应对有机半导体成分分析的影响

重吸收是最基本的光学现象之一，但在基于光谱的有机半导体成分分析中却很少被考虑。在此，我们以四种最先进的有机太阳能电池（OSC）材料为例，通过实验研究和光学模拟，系统地研究了重吸收对光致发光发射光谱和激发光谱的影响。我们发现，这些 OSC 材料的吸收光谱和发射光谱之间的重叠足以使它们受到重吸收效应的影响，而且在多组分体系中，不同物种之间的重吸收效应更加明显。此外，我们还发现了重吸收效应和重吸收强度的三个特征，并以此成功分析了一系列 OSC 材料在溶液和固态薄膜中的组成。我们的工作不仅让人们对广泛使用的光谱技术中被忽视的重吸收特征有了重要的认识，而且为有机半导体的成分分析提供了一个有效的工具箱。

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来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.