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化是否必然导致非富勒基有机太阳能电池的效率提高? 一个理论探索

Qi Wu¹, Jing Gao², Lan Zhang³

¹State Key Laboratory of Integrated Optoelectronics, Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, School of Physics, Northeast Normal University, 5268 Renmin Street, Changchun 130024, Jilin, China.

The journal of physical chemistry letters

|August 25, 2025

概括

有机太阳能电池材料的战略化通过改善分子相互作用和能量水平来提高功率转换效率 (PCE). 促进单元能量转移,同时抑制三元能量转移是优化PCE的关键.

科学领域:

材料科学
有机电子
太阳能发电

背景情况:

化是一种已知的提高有机太阳能电池功率转换效率的策略.
然而,化对活性层形态和能量传递过程的具体影响需要进一步研究.
了解这些影响对于设计高性能有机光伏 (OPV) 材料至关重要.

研究的目的:

研究战略化对有机太阳能电池形态和性能的影响.
阐明化,分子间相互作用,能量水平对齐和能量转移动态之间的关系.
基于能量转移和再组合来预测PCE的新描述符.

主要方法:

化 (PM6/Y6) 和非化 (PBDB/Y5) 有机太阳能电池系统的比较研究.
在回火后对活性层集群结构的分析.
评估分子间相互作用,能量水平对齐和静电潜力.
研究单体和三体能量传递过程.
开发一个PCE预测描述器.

主要成果:

在PM6/Y6中化和PBDB/Y5中缺乏化导致稳定的活性层集群结构.
这些结构增强了分子间相互作用,改善了捐赠者-接受者的能量水平对齐,并实现了近乎中性的静电潜力.
促进单体能量转移与PCE正相关,同时抑制三体能量转移也有益.
一个结合单点能量传递速率和电子孔重组距离的描述器被提出.

结论:

战略性化对于优化有机光伏材料至关重要,而不是随意替代.
这项研究强调了控制高PCE的能量传输途径 (单元与三元) 的重要性.
拟议的描述符为预测和优化OPV性能提供了一种新方法.

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