超过19%的效率有机太阳能电池通过通过侧链化功能来操纵分子间相互作用来实现
Huawei Hu1,2, Shuai Liu1, Jiaoyu Xu1
1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China.
Angewandte Chemie (International ed. in English)
|February 8, 2024
概括
非富勒受体 (NFAs) 的侧链功能化通过优化分子包装和形态来改善有机太阳能电池 (OSC) 的性能. 这一策略提高了设备中的功率转换效率 (PCE).
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:
- 非富勒受体 (NFAs) 对于有机太阳能电池 (OSC) 的性能至关重要.
- 侧链功能化是一种已知的增强OSC的策略,但结构-属性关系需要进一步研究.
研究的目的:
- 调查功能化对Y系列NFA侧链的影响.
- 为了在有机太阳能电池中建立结构修改和设备性能之间的明确关系.
主要方法:
- 合成了两个NFAs,BTP-F0和BTP-F5,其侧链中的含量各不相同.
- 采用理论和实验方法来分析静电电位,分子包装和散装异质连接形态.
- 使用合成的NFAs制造和特征有机太阳能电池设备.
主要成果:
- 侧链化增加了平均静电潜力和电荷平衡,增强了分子间相互作用.
- 化NFAs (BTP-F5) 导致OSCs的结晶性,域纯度和垂直相分布得到改善.
- 基于BTP-F5的OSC实现了17.3% (二进制) 和19.2% (三进制) 的功率转换效率 (PCE),超过了基于BTP-F0的设备 (16.1% PCE).
结论:
- Y系列NFA侧链的功能化是调整分子包装和形态学的有效策略.
- 优化的形态结构促进了刺激子扩散,减少了电荷重组,并改善了OSC中的电荷提取.
- 这项研究提供了通过侧链工程设计高效有机太阳能电池的结构性能关系.
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