通过非对称核心异构化在替代受体中优化晶体框架,用于高效的二元有机太阳能电池.
Can Yang1, Qiaoshi An1, Mengyun Jiang1
1Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, China.
Angewandte Chemie (International ed. in English)
|October 12, 2023
概括
研究人员为有机太阳能电池 (OSC) 设计了新型含的小分子受体 (SMA). 优化的A-OSeF分子在二元OSC设备中实现了创纪录的18.5%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:
- 小分子受体 (SMA) 对有机太阳能电池 (OSC) 的效率至关重要.
- 在SMA中,结构性异构化和替代都会影响设备性能.
- 这些修改的协同效应尚未完全理解.
研究的目的:
- 调查SMA中区域性异构化和替代的联合效应.
- 为高效的OSCs开发具有增强性能的新型SMA.
- 为含有的SMA建立结构-属性关系.
主要方法:
- 三种异构体SMAs (S-CSeF,A-ISeF,A-OSeF) 的合成,其位置和异构芳香环的不同.
- 对A-OSeF进行晶体分析,以了解分子包装.
- 使用开发的SMA,制造和表征OSC设备.
- 分析薄膜形态,带隙,结晶性和电荷移动性的分析.
主要成果:
- A-OSeF展示了更紧密的π-π堆叠和更有序的3D网络包装.
- 替代的向外转移导致了更宽的带间隙,更高的晶度和更好的电子流动性.
- PM1:A-OSeF混合物显示出有利的纤维形态,有序的包装和高效的电荷运输.
- 基于A-OSeF的设备在二进制OSC中实现了创纪录的18.5%的功率转换效率.
结论:
- 对位置和异芳环的精确分子工程提供了一种协同方法.
- 优化分子包装和电荷运输是高性能OSC的关键.
- 这项工作为OSC应用开发排名第一的含SMA提供了有前途的战略.
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