层次的固体添加剂策略,以实现层层的有机太阳能电池,效率超过19%
Qiaoling Chen1, Ziqing Bian1, Yujie Yang1
1Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, 100875, China.
Angewandte Chemie (International ed. in English)
|June 13, 2024
概括
这项研究引入了一种新的层次沉积策略,用于有机太阳能电池 (OSC) 使用不同的固体添加剂. 这种方法通过优化电荷流动性和减少重组来提高功率转换效率 (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:
- 在有机太阳能电池 (OSC) 中层次沉积 (LbL) 提供了对活性层特性的精确控制.
- 在每个层中使用多种不同的固体添加剂实现高性能LbL OSC存在重大挑战.
研究的目的:
- 研究一种用于将不同的固体添加剂纳入LbL有机太阳能电池特定层的新策略.
- 通过提高电荷载体的移动性和通过有针对性的添加剂放置抑制重组,提高OSC的性能.
主要方法:
- 将FeCl3作为p型剂添加到供体 (D18) 层中,以提高孔中的度和移动性.
- 在接受器 (L8-BO) 层中添加聚,9,9-di-n-octylfluorenyl-2,7-diyl) (PFO),以增强形态和刺激子寿命.
主要成果:
- 一个D18+FeCl3/L8-BO装置实现了18.12%的功率转换效率 (PCE),一个D18/L8-BO+PFO装置达到18.79%.
- 在D18+FeCl3/L8-BO+PFO装置中的综合策略导致了显著的PCE19.17%,超过了控制装置的17.59%.
- 层叠增材方法改善了电子和孔的移动性,抑制了电荷重组,并没有对开放电路电压产生负面影响.
结论:
- 战略性地将不同的固体添加剂纳入特定层的LbL OSC是提高性能的一种有效方法.
- 这种分层固体添加剂策略为开发高效有机太阳能电池提供了一个有希望的途径.
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