一个多晶聚合物捐赠剂作为预聚合物,用于有序分子聚合,以达到19.3%的效率 二元有机太阳能电池
Chuanhang Guo1, Yiwei Fu1, Donghui Li1
1School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China.
Advanced materials (Deerfield Beach, Fla.)
|July 19, 2023
概括
使用聚合物供体 (PM6) 多晶体的新策略增强了有机太阳能电池中的分子排序. 这提高了薄薄和厚厚的光活性层的功率转换效率.
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:
- 有机半导体在固体薄膜中表现出有限的结构秩序,阻碍了电荷传输,并增加了光伏设备中的重组.
- 在有机太阳能电池中实现高效率需要在活性层中优化分子包装和形态.
研究的目的:
- 开发一种"多晶体诱导聚合"策略,以改善PM6:L8-BO有机太阳能电池中的分子排序.
- 为了提高有机太阳能电池的功率转换效率 (PCE),具有不同的光活性层厚度.
主要方法:
- 通过蒸汽扩散化PM6多晶体.
- 通过在中重新溶解PM6多晶体来制备PM6预聚合物 (PM6-PA).
- 将PM6-PA纳入常规PM6:L8-BO混合溶液中,用于溶液造.
主要成果:
- 添加PM6-PA延长了分子组织,并增强了PM6和L8-BO组件的聚合.
- 有机太阳能电池具有100纳米厚的活性层,其PCE达到19.3% (从18.0%上升).
- 有机太阳能电池具有300纳米厚的活性层,其PCE达到17.2% (高于16.2%).
结论:
- "多晶体诱导聚合"策略有效地改善了有机半导体薄膜中的分子排序.
- 这种方法可以显著提高有机太阳能电池的性能,特别是对于较厚的活性层.
- 这种方法提供了一条可行的途径,实现更高效率的有机光伏设备.
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