分子相互作用诱导有机太阳能电池向有机太阳能电池的双纤维,其认证效率超过20%
Chen Chen1, Liang Wang1, Weiyi Xia1
1School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China.
Nature communications
|August 10, 2024
概括
研究人员开发了一种新的非富勒受体L8-ThCl,以提高有机太阳能电池的性能. 这种添加剂诱导纤维状形态,提高功率转换效率超过20%的增强有机太阳能电池.
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:
- 具有远程结构秩序的纳米级纤维状形态对于有机太阳能电池中高效的激子解离和电荷传输至关重要.
- 在有机太阳能电池中实现高性能需要优化形态,以获得更好的充电动力学.
研究的目的:
- 合成一种新型的烯终结非烯受体 (L8-ThCl),以诱导聚合物捐赠者和宿主受体中的纤维状形态.
- 提高有机太阳能电池的结构秩序和功率转换效率 (PCE).
主要方法:
- 合成L8-ThCl,一个非富勒烯受体.
- 将L8-ThCl纳入聚合物供体 (PM6或D18) 和宿主受体 (L8-BO) 混合物.
- 使用层次沉积方法来保持增强的结构秩序.
主要成果:
- 在聚合物供体 (PM6,D18) 中添加L8-ThCl精炼和放大纳米纤维,并在宿主受体 (L8-BO) 中诱导有序纳米纤维.
- 使用PM6:L8-ThCl/L8-BO:L8-ThCl的有机太阳能电池实现了19.4%的PCE.
- 使用D18:L8-ThCl/L8-BO:L8-ThCl的有机太阳能电池实现了20.1%的PCE,经过认证的20.0%的效率,创造了单环有机太阳能电池的新纪录.
结论:
- 合成的L8-ThCl有效地促进了可取的纳米级纤维状形态,从而显著改善了有机太阳能电池的性能.
- 层层沉积方法有效地保持了增强的结构秩序,这对于在单环有机太阳能电池中实现创纪录的功率转换效率至关重要.
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