通过调节输送器-接收器穿透接口来抑制有机太阳能电池中的电子-声波合和能量损失
Yongmin Luo1, Yulong Hai1, Yao Li1
1Thrust of Advanced Materials, The Hong Kong University of Science and Technology (Guangzhou), Nansha, Guangzhou, China.
Nature communications
|January 25, 2026
概括
研究人员在有机太阳能电池 (OSC) 中确定了两个捐助者-受体界面相. 调节"透"阶段可以减少非辐射能量损失,增强开放电路电压 (VOC) 并提高OSC效率.
科学领域:
- 材料科学 材料科学 材料科学
- 物理化学 物理化学
- 有机电子 有机电子
背景情况:
- 有机太阳能电池 (OSC) 面临效率限制,原因是非辐射能量损失 (qΔVnr),主要与界面电荷转移 (CT) 状态有关.
- 电子音声合 (EPC) 对这种损失机制的确切影响尚未完全理解.
研究的目的:
- 调查接口阶段和EPC在OSCs非辐射能量损失中的作用.
- 确定降低qΔVnr和提高有机太阳能电池的开放电路电压 (VOC) 的策略.
主要方法:
- 对三种全聚合物OSC和四种基于小分子受体 (SMA) 的OSC进行比较分析.
- 鉴定和描述两个不同的捐赠体-接受体 (D-A) 接口混合相:纠 (E-) 和透 (P-) 接口.
- 评估不同界面相中的电子声波合 (EPC) 强度.
主要成果:
- 确定了两个D-A接口阶段,E-和P-接口,促进了对电荷产生至关重要的独特的CT状态.
- 与E接口相比,P接口表现出明显较弱的EPC (qΔVnr减少约60 meV),特别是在全聚合物OSC中.
- 将PA纳入SMA系统调节了P接口群体,减少了EPC并增强了VOC.
结论:
- 调节P接口群体以抑制EPC是一种有前途的策略,用于减少OSC中的非辐射电压损失.
- 这种方法为克服有机太阳能电池技术效率瓶提供了一条可行的途径.
- 了解界面相位动态是设计下一代高效有机太阳能电池的关键.
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