Hybrid nonfullerene acceptor merged from IT-4F and Y6 for efficient organic solar cells

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2025-07-24 DOI:10.1016/j.dyepig.2025.113065

Fangbo Zhao , Ming Sun , Zhihua Zhou , Lifei Yi , Jiamin Cao , Wenhong Peng , Qiang Tao , Wanqiang Liu , Xiaoyan Du , Donghong Yu

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Abstract

Over the last decade, power conversion efficiencies (PCEs) of organic solar cells (OSCs) have grown double to ∼20 %, which primarily originates from the development of non-fullerene acceptors (NFAs). Up to now, ITIC- and Y-series NFAs remain the most successful acceptor materials, with IT-4F and Y6 molecules being their representative compounds, respectively. Herein, a hybrid NFA TITT-2F, integrating structural features of both IT-4F and Y6, was developed, which is based on thieno[2′,3':4,5]thieno[3,2-b]indole-thieno[3,2-b]thiophene core incorporating a spiro group. As a result, TITT-2F exhibits medium crystallinity and absorption spectrum with a low optical bandgap of ∼1.44 eV, a planar molecular geometry, and suitably-aligned energy levels. An OSC based on PM6:TITT-2F afforded a respectable PCE of 12.16 %. Furthermore, a ternary PM6:5 %TITT-2F:95 %Y6 cell exhibited a promising PCE of 16.37 % with a V_OC of 0.86 V, a J_SC of 26.74 mA/cm², and a fill factor (FF) of 71.56 %. These enhancements are attributed to balanced charge carrier mobilities, efficient exciton dissociation, and face-on orientation in blend films. These findings demonstrate that hybrid NFAs hold a great potential for well-performed OSC applications.

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由IT-4F和Y6合成的杂化非富勒烯受体用于高效有机太阳能电池

在过去的十年中，有机太阳能电池（OSCs）的功率转换效率（pce）增长了一倍，达到20%，这主要源于非富勒烯受体（nfa）的发展。到目前为止，ITIC-和y -系列nfa仍然是最成功的受体材料，IT-4F和Y6分子分别是它们的代表化合物。本文以含一个螺旋基团的噻吩[2′，3′：4,5]噻吩[3,2-b]吲哚-噻吩[3,2-b]为核心，结合了IT-4F和Y6的结构特征，开发了一种杂化NFA TITT-2F。因此，TITT-2F具有中等结晶度和低光学带隙（约1.44 eV）的吸收光谱，具有平面分子几何结构和合适的排列能级。基于PM6:TITT-2F的OSC提供了12.16%的可观PCE。此外，三元pm6: 5% TITT-2F: 95% Y6电池的PCE为16.37%，VOC为0.86 V， JSC为26.74 mA/cm2，填充因子（FF）为71.56%。这些增强归因于平衡的载流子迁移率，有效的激子解离和混合膜的正面取向。这些发现表明，混合NFAs对于性能良好的OSC应用程序具有巨大的潜力。

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.