高效后富勒伦太阳能电池的光伏混合微结构. 倾斜还是不倾斜?
Gang Wang, Steven M Swick, Micaela Matta
1Material Science and Engineering Division , National Institute of Standards and Technology , Gaithersburg , Maryland 20899 , United States.
Journal of the American Chemical Society
|August 6, 2019
概括
优化聚合物太阳能电池 (PSC) 的效率需要调整供体-受体形态. 捐赠聚合物的小替代剂改善了混合物形态和电荷传输,从而提高了功率转换效率 (PCE).
科学领域:
- 材料科学
- 有机电子
- 太阳能发电
背景情况:
- 有效的聚合物太阳能电池 (PSC) 取决于最佳的供体-受体异质连接形态.
- 控制混合物形态对于增强电荷生成和收集至关重要.
研究的目的:
- 研究基替代剂尺寸对聚合物形态,电荷传输和PSC性能的影响.
- 使用实验和理论方法将聚合物结构与混合物形态和设备效率相关联.
主要方法:
- 用ITIC-Th混合的二二醇供体聚合物的实验性表征.
- 分子动力学 (MD) 模拟分析聚合物构造和膜形态.
- 分析电荷传输,载体动力学和功率转换效率 (PCE).
主要成果:
- 基替代物尺寸显著影响了混合物形态,域纯度和尺寸.
- 具有最小替代物的聚合物获得了最高的PCE (11%),与小的纯域相关.
- MD模拟显示了受替剂驱动的聚合物构造,影响聚合和膜形态.
结论:
- 替代物尺寸是控制聚合物形态和PSC性能的关键.
- 一个简单的能量参数可以预测形态趋势并指导材料设计.
- 替代品选择策略可以优化PSC材料以提高效率.
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