对于高效的有机光伏电池而言,完全不融合的受体的分子设计
Ni Yang1,2, Yong Cui1, Tao Zhang1,2
1Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Journal of the American Chemical Society
|March 25, 2024
概括
研究人员使用硫--硫受体开发了新的低成本有机光伏 (OPV) 材料. 一个新的TBT-13接受器实现了创纪录的16.1%的效率,为高性能OPV提供了实用的设计策略.
科学领域:
- 材料科学
- 有机电子
- 太阳能发电
背景情况:
- 非化硫--硫 (TBT) 单元为低成本有机光伏 (OPV) 材料提供了途径.
- 目前基于TBT的接受器在能量转换效率方面面临限制.
研究的目的:
- 设计和合成基于TBT的新型接受器,以提高性能.
- 研究侧链替代对TBT接受器特性和OPV装置效率的影响.
主要方法:
- 三个基于TBT的受体与不同位置分支的侧链的合成.
- 在混合膜中对分子构成, π-π 堆积和聚合的描述.
- 使用与PBQx-TF供体混合的合成受体进行OPV设备的制造和性能测试.
主要成果:
- 与TBT-10和TBT-11相比,TBT-13具有具有显著的硬体障碍的α位置分支侧链,表现出更平坦和更稳定的形状.
- TBT-13/PBQx-TF混合膜显示出有利的π-π叠加和聚合,导致增强的电荷传递.
- 基于TBT-13的OPV电池实现了创纪录的16.1%的功率转换效率,并显著改善了短路电流密度和填充系数.
结论:
- 位置分支侧链工程,特别是以α位置替代,是提高非接的TBT基础OPV接受器性能的一种可行的策略.
- 开发的TBT-13接受器代表了高性能,低成本OPV材料的重大进步.
- 这项研究为未来的OPV材料开发提供了实用的分子设计方法.
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