通过用于有机光伏的A-DA'D-A型异基小分子受体实现近红外吸收
Hui Liu1, Yu Wu2, Dong-Nai Ye3
1School of Intelligent Manufacturing and Materials Engineering, Gannan University of Science and Technology, Ganzhou 341000, China.
Molecules (Basel, Switzerland)
|January 25, 2025
概括
基于isoindigo (IID) 的新型非融合环接受器 (URA) 被合成为有机太阳能电池. 链工程显著改善了光电特性,导致3.10%的功率转换效率.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 太阳能光伏发电是如何实现的
背景情况:
- 基于Isoindigo (IID) 的非富勒伦受体对有机光伏至关重要,因为它们具有广泛的吸收和高电荷流动性.
- 非化环接收器 (URA) 提供可调节的电子特性,以提高设备的性能.
研究的目的:
- 设计和合成新型A-DA'D-A类型的URA,使用IID和环二烯 (CPDT) 核心.
- 研究不同基链长度对分子平面性,吸收光谱和电荷转移特性的影响.
- 评估这些URA在有机太阳能电池 (OSC) 设备中的性能.
主要方法:
- 通过使用具有不同链的CPDT和IID单元,通过直接的CH-arylation (DACH) 合成两个URAs,IDC8CP-IC和IDC6CP-IC.
- 分子平面性的表征,吸收光谱,带间隙和分子吸收系数.
- 包括合成的URAs在内的OSC设备的制造和测试.
主要成果:
- 两种合成的URA都表现出有利的分子平面性,广泛的吸收,低频段间隙和高分子吸收系数.
- 与IDC8CP-IC相比,IDC6CP-IC显示了增强的分子间电荷转移和J聚合.
- 使用IDC6CP-IC的OSC设备实现了3.10%的功率转换效率 (PCE),其光响应范围从400nm到900nm.
结论:
- 链工程显著影响了基于IID的URA的合成,光电特性和设备性能.
- DACH是一种有效的方法,用于合成具有近红外 (NIR) 吸收能力的基于 IID 的 URA.
- 这些URA是大量异质连接 (BHJ) OSC应用的有希望的候选者.
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