具有大型二极管和特殊薄膜形成动力学的挥发性伊米德添加剂使高性能有机太阳能电池成为可能
Shuangshuang Xia1, Jie Xu1, Zongtao Wang2
1School of Chemistry and Chemical Engineering/Film Energy Chemistry for Jiangxi Provincial Key Laboratory (FEC), Nanchang University, Nanchang, 330031, China.
Angewandte Chemie (International ed. in English)
|February 25, 2025
概括
具有较大的二极极瞬间的新型挥发性伊米德添加剂提高有机太阳能电池 (OSC) 的性能和形态. 这些添加剂与传统添加剂不同,促进更好的薄膜形成,提高OSC的功率转换效率 (PCE).
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:
- 大双极时刻添加剂改善有机太阳能电池 (OSC) 形态和性能.
- 传统添加剂的强烈分子间相互作用阻碍了它们的去除,可能会影响设备的稳定性.
- 为OSCs开发具有高二极子时刻的挥发性添加剂仍然是一个重大挑战.
研究的目的:
- 报告新型挥发性伊米德添加剂通过形态修饰来提高OSC性能.
- 研究素原子的定位异构对分子配置和相互作用的影响.
- 探索这些添加剂诱导的独特的薄膜形成动力学.
主要方法:
- 选三种N-(烯) 甲胺 (ClPA) 添加剂 (oClPA,mClPA,pClPA) 具有不同的双极时刻.
- 分子配置和分子间相互作用的分析.
- 研究薄膜形成动力学,特别是核和晶体生长.
- 使用这些添加剂的有机太阳能电池的制造和性能测试.
主要成果:
- 与现有的固体添加剂相比,ClPAs表现出较大的二极极矩 (2.0664到4.7896德拜).
- ClPAs诱导一种独特的膜形成过程:接受子核形成,然后增长,从而改善结晶性.
- 在PM6:BTP-eC9系统中使用pClPA,OSC的功率转换效率 (PCE) 从16.13%提高到18.58%.
- 在使用pClPA.其他系统 (PM6:L8-BO,PM6:Y6,D18:L8-BO) 中,高达19.04%的PCE得到了实现.
结论:
- 基于伊米德的挥发性添加剂为改善OSC性能提供了一个简单而有效的策略.
- 素原子的定位异质化显著影响分子相互作用和光伏性能.
- 由ClPAs诱导的独特薄膜形成动力学对于实现高质量的形态和提高设备效率至关重要.
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