聚合诱导排放分子设计,以减轻有机太阳能电池中的非辐射能量损失
Yingze Zhang1,2, Rongkun Zhou3, Mingjie Rong2
1Department of Chemistry, Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials, Energy Institute and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction, Hong Kong University of Science and Technology, Hong Kong, China.
Advanced materials (Deerfield Beach, Fla.)
|January 21, 2026
概括
有机太阳能电池 (OSCs) 的效率通过使用聚合诱导排放 (AIE) 分子来减少能量损失而得到提高. 这种分子设计策略显著提高了开放电路电压 (VOC) 和设备性能.
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:
- 非辐射能量损失限制了开放电路电压 (VOC) 和有机太阳能电池 (OSC) 的效率.
- 聚合引起的火 (ACQ) 是固态OSC设备中能量损失的主要原因.
- 开发提高固态光发光量子产率 (PLQY) 的策略对于提高OSC性能至关重要.
研究的目的:
- 引入使用聚合诱导排放 (AIE) 的分子设计策略,以抑制ACQ并增强OSC中的PLQY.
- 为了减轻非辐射重组损失,并改善有机太阳能电池的VOC.
- 建立AIE分子设计作为下一代OSC的有效方法.
主要方法:
- 将一个原型的AIE动图,四乙烯 (TPE) 纳入Y系列非富勒受体的终端组,以创建dTPE.
- 研究了dTPE的光发光特性,包括固态PLQY和电光发光外部量子效率.
- 使用D18:dTPE和D18:L8BO-C4混合物制造和表征有机太阳能电池设备,以评估VOC和非辐射电压损失.
主要成果:
- 与L8BO-C4相比,新型dTPE接受器表现出明显的AIE特征,并且在固态PLQY中增强了三倍.
- 对dTPE的电发光外部量子效率比D18:L8BO-C4.4高出一个数量级.
- D18:dTPE装置实现了0.130 eV的非辐射重组损失,0.190 eV的非辐射电压损失,以及0.93 V的前所未有的VOC,从而达到20.5%的效率.
结论:
- 利用AIE的分子设计是一种有效的策略,可以克服OSC中Y系列接受器的内在限制.
- 这种方法显著减轻非辐射能量损失,导致高效的OSC记录VOC.
- 这些发现为设计下一代OSC提供了指导原则,以提高性能和减少能源损失.
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