有机太阳能电池中的垂直组件分布由光交联和层次沉积控制
Ryo Suzuki1,2, Kyohei Nakano1, Makoto Miyasaka2
1RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.
Small (Weinheim an der Bergstrasse, Germany)
|May 3, 2025
概括
通过层次沉积来控制有机太阳能电池 (OSC) 中的聚合物光交联密度,可以创建独特的结构,通过增强捐赠者-接受者接口来优化较低密度的性能.
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:
- 大量异质连接 (BHJ) 有机太阳能电池 (OSC) 依赖于相互透的供体和受体网络以实现高效的电荷分离.
- 层层沉积 (LbL) 被探索为一种替代方法来控制OSCs的形态.
- 之前的假设表明,LbL自然会产生有益的成分梯度或p-i-n结构.
研究的目的:
- 调查光交联密度对BHJ OSC垂直组件分布的影响.
- 了解交叉连接器度如何影响LbL沉积期间的受体分子透.
- 为了将材料分布与OSC性能相关联.
主要方法:
- 通过将供体聚合物的光交联与接受分子的LbL沉积相结合.
- 使用不同度的四亚齐林光交联剂.
- 使用飞行时间二次离子质谱法 (TOF-SIMS),X射线光电子光谱法 (XPS) 和放牧事件广角X射线散射 (GIWAXS) 进行分析.
主要成果:
- 交叉连接器密度显著影响了供体和受体材料的垂直分布.
- 越来越多的交叉连接器密度导致不同的双层结构,具有不同的成分比率.
- 在较低的交叉连接密度 (12.6%的效率) 的均混合结构中,OSC的性能最高.
结论:
- 较高的交叉连接密度会造成不太理想的输送接收接口,从而降低功率转换效率 (降至4.48%).
- 这项研究挑战了LbL沉积中固有的梯度形成假设.
- 控制交叉连接提供了一种方法来设计BHJ形态,并优化OSC性能.
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