基半导体聚合物的结构行为中的摩尔质量值
Matteo Sanviti1, Jeromy Rech2, Xiaowei Zhong2
1Universidade da Coruña Campus Industrial de Ferrol, CITENI, Campus de Esteiro S/N, Ferrol 15471, Spain.
优化供体聚合物质量是高效有机太阳能电池 (OSC) 的关键. 70kg/mol的值增强了微观结构,导致了优越的设备性能和受控的结晶性演变.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 有机电子 有机电子
背景情况:
- 有机太阳能电池 (OSC) 的性能取决于活性层组件的固态微观结构,特别是供体半导体聚合物.
- 基于二烯 (BDT) 的聚合物对于在OSC中实现高功率转换效率至关重要.
研究的目的:
- 研究摩尔质量对BDT基聚合物的结构性行为 (D18Cl和PBnDT-FTAZ) 的影响.
- 为了将聚合物微结构与有机太阳能电池设备性能相关联.
主要方法:
- 原子力显微镜 (AFM) 的使用
- 放牧发生率广角X射线散射 (GWAXS)
- 紫外线对紫外线的光谱学.
- 快速扫描热量计 (FSC) 是一种快速扫描热量计.
主要成果:
- 对于最佳的固态微观结构,确定了70kg/mol的值数平均摩尔质量 (Mn).
- ~70公斤/的聚合物显示域大小减少,高晶度 (DoC),强大的面向方向,蓝移吸收,以及更高的中相融温度.
- 最高性能的OSC设备使用了70kg/mol的聚合物,这表明质量,微观结构和功能之间存在直接联系.
结论:
- 调Mn对于优化基于BDT的聚合物的固态微观结构至关重要.
- 超冷液相中的细分动力学控制了热化过程中DoC的演变.
- 这些发现为通过控制聚合物分子质量来设计高效的OSC提供了框架.
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