Conjugated polymers with thiazolothiazole as the acceptor unit for high performance organic solar cells

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED Dyes and Pigments Pub Date : 2024-05-25 DOI:10.1016/j.dyepig.2024.112247

Nan Wei , Lu Hao , Dawei Li , Ziqing Bian , Shuyue Song , Jiaxin He , Cuihong Li , Andong Zhang , Yahui Liu , Zhishan Bo

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Abstract

In this study, we used a simple, cost-effective, and high-yield synthetic route to successfully synthesize two thiazolothiazole-based wide-bandgap donor polymers, namely TTZ and ANTTZ. We systematically investigated how the solubility, absorption and photoelectric properties of the materials were influenced by the position of ester group at the thiophene unit as π-bridge. Theoretical calculations, UV–vis spectroscopy and GIWAXS results revealed that TTZ possesses planar molecular backbone and higher crystallinity. Ultimately, with BTP-ec9-4F as the acceptor, the TTZ based devices can achieve an impressive power conversion efficiency (PCE) of 13.96%; whereas the ANTTZ based devices can give a PCE of only 3.07%. This research underscores the effectiveness of a cost-efficient donor material synthesis route and highlights the crucial influence of the side chain position on crystallinity of the polymer, offering a new direction for designing low-cost, high-efficiency photovoltaic materials.

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以噻唑并噻唑为受体单元的共轭聚合物用于高性能有机太阳能电池

在本研究中，我们采用简单、经济、高产的合成路线，成功合成了两种噻唑噻唑基宽带隙供体聚合物，即和。我们系统地研究了作为π桥的噻吩单元上的酯基位置如何影响材料的溶解性、吸收性和光电特性。理论计算、紫外可见光谱和 GIWAXS 结果表明，BTP-ec9 具有平面分子骨架和较高的结晶度。最终，以 BTP-ec9-4F 为受体，基于 BTP-ec9-4F 的器件的功率转换效率（PCE）达到了惊人的 13.96%；而基于 BTP-ec9-4F 的器件的功率转换效率仅为 3.07%。这项研究强调了低成本高效率供体材料合成路线的有效性，并突出了侧链位置对聚合物结晶度的关键影响，为设计低成本高效率光伏材料提供了新的方向。

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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.