双兼容的极性切换小分子使有机太阳能电池中的辅助电荷生成和运输通路成为可能
Jiawei Deng1,2, Guangkuo Dai2, Lixuan Kan3
1Hangzhou International Innovation Institute, Beihang University, Hangzhou, 311115, P.R. China.
Angewandte Chemie (International ed. in English)
|October 11, 2025
概括
新的小分子L8-CT和L8-2CT通过增强捐赠者-接受者接口来提高有机太阳能电池 (OSC) 的性能. 这导致三元有机太阳能电池 (OSC) 的效率和稳定性更高.
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:
- 有机太阳能电池 (OSC) 的商业化面临着诸如电压损失,效率低下的界面电荷生成和形态稳定性差等挑战.
- 当前的界面调节方法往往受到能量水平不匹配和分子兼容性差的困扰.
- 为三元OSC设计有效的第三组件需要克服这些局限性.
研究的目的:
- 为三元有机太阳能电池 (OSC) 设计和合成新的小分子 (L8-CT,L8-2CT).
- 研究这些分子对界面特性,电荷生成和形态稳定性的影响.
- 为了提高OSC设备的功率转换效率和光稳定性.
主要方法:
- 通过L8-BO的末端组置换合成了两个小分子,L8-CT和L8-2CT.
- 与PM6 (捐赠者) 和L8-BO (接受者) 结合的L8-2CT作为三元混合物的第三个成分.
- 评估了设备的性能,界面特性,分子包装,激子扩散和形态稳定性.
主要成果:
- L8-2CT显示出与捐赠体 (PM6) 和接受体 (L8-BO) 两者的良好混合性.
- 与L8-2CT的三级混合物显示,刺激子扩散时间减少,并增强了界面分子透.
- PM6:L8-BO:L8-2CT三元装置实现了20.33%的功率转换效率,并改善了光稳定性.
结论:
- 设计的L8-2CT分子有效地解决了三元OSC中的界面限制.
- 这种方法挑战了有机太阳能电池中第三组件的传统设计策略.
- 该研究强调了开发高性能和稳定的三元OSC的有希望的途径.
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