具有高晶度和光发光量产的非富勒伦受体使有机太阳能电池的效率>20%成为可能
Chao Li1,2, Jiali Song3,4, Hanjian Lai5
1School of Chemistry, Beihang University, Beijing, China.
Nature materials
|January 29, 2025
概括
设计具有高晶度和光发光量产 (PLQY) 的非富勒受体 (NFAs) 是高效的有机太阳能电池 (OSC) 的关键. 在L8-BO-C4中的不对称基链分支同时增强了这两种特性,从而产生了高性能的OSC.
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:
- 高效的有机太阳能电池 (OSC) 需要具有优化的晶度和光发光量产 (PLQY) 的非富勒受体 (NFAs).
- 一个常见的挑战是NFA结晶度和PLQY之间的反向关系,导致设备中显著的非辐射能量损失.
研究的目的:
- 为了研究不对称的基链分支位置对L8-BO受体的烯单元的影响.
- 同时提高NFAs的晶度和PLQY,以提高OSC性能.
主要方法:
- 合成和表征L8-BO受体衍生物,具有多种不对称的基链分支.
- 评估了合成的NFAs的结晶性和PLQY.
- 使用优化的NFA制造和测试的单节OSC.
主要成果:
- L8-BO-C4,具有不对称的2 - - 丁酸和4 - - 丁酸链,实现了同时增加晶度和PLQY.
- 使用L8-BO-C4制造的单节OSC显示了20.42%的高功率转换效率 (认证为20.1%).
- 实现了0.894V的高开放电路电压和81.6%的填充系数.
结论:
- 链分支位置的不对称适应是微调NFA属性的关键策略.
- 这种方法有效地克服了结晶性和PLQY之间的权衡,使高性能NFAs成为可能.
- 开发的L8-BO-C4受体对提高高效的有机太阳能电池的发展有很大的前景.
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