通过非富勒烯客体受体的异构工程来实现高性能三级有机太阳能电池
Zhenzhong Pan1, Renjie Xu2,3, Yuanyuan Jiang2,3
1Institute of Applied Chemistry, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|February 26, 2026
概括
设计异构非烯受体 (NFAs) 是有效的有机太阳能电池 (OSC) 的关键. 一种特定的同位素BTP-γ-Br增强了三元混合的结晶性和电荷传输,实现了高功率转换效率 (PCE) 19.2%.
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:
- 三级混合物对高性能有机太阳能电池 (OSC) 是有前途的.
- 为三元混合物选择客非富勒烯受体 (NFAs) 是具有挑战性和耗时的.
- 研究NFAs的异构效应对于优化OSC特性至关重要.
研究的目的:
- 系统地研究客NFA对三元OSCs物理化学和光伏性能的影响.
- 设计和合成两个同位素NFAs,BTP-γ-Br和BTP-δ-Br,具有不同的替代位点.
- 了解分子结构如何影响分子方向,聚合和分子间相互作用.
主要方法:
- 合成两个同位素NFAs:BTP-γ-Br和BTP-δ-Br. 这两种同位素的合成.
- 物理化学性质的表征,包括双极时刻,吸收,结晶性和分子方向.
- 二元和三元OSC设备的制造和测试.
- 分析设备性能指标,如开放电路电压 (VOC),非辐射能量损失和功率转换效率 (PCE).
主要成果:
- BTP-δ-Br表现出较大的二极子时刻,红移吸收,以及过度聚合的倾向.
- BTP-γ-Br表现出较弱的结晶性和面对分子方向,CN...H相互作用增强了分子间力量.
- 使用D18:BTP-γ-Br的二进制设备显示了减少的非辐射能量损失 (0.18 eV) 和高VOC (0.931 V).
- 三级D18:BTP-γ-Br:N3设备显示了更好的结晶性和电荷传输,导致PCE高达19.2% (认证为18.9%).
结论:
- 客户NFA的合理设计,考虑到异构效应,是开发高性能三元OSC的有效策略.
- 由BTP-γ-Br诱导的特定分子相互作用和形态显著提高了设备的性能.
- 了解和控制NFA异构对于推进有机太阳能电池技术至关重要.
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