通过降低有效的聚合物区域规律性来提高聚烯:富勒烯太阳能电池的热稳定性
Kevin Sivula1, Christine K Luscombe, Barry C Thompson
1Departments of Chemistry and Chemical Engineering, University of California-Berkeley, 718 Latimer Hall, Berkeley, CA 94720-1460, USA.
Journal of the American Chemical Society
|October 26, 2006
概括
将一个共纳体引入到多3-基thiophene (P3HT) 中,可以调整其区域规律性. 较低的区域规律性P3HT (>91%) 产生更热稳定的聚合物太阳能电池与PCBM,保持电子性能.
科学领域:
- 有机电子学有机电子学
- 聚合物化学 聚合物化学
- 材料科学是一种材料科学.
背景情况:
- 聚3-甲 (P3HT) 的区域规律性显著影响其在有机电子中的电子特性和性能.
- 高区域规律性P3HT (>96%) 通常是大量异质连接 (BHJ) 太阳能电池中最佳电荷传输的理想条件.
- BHJ形态的热稳定性对于设备的寿命至关重要.
研究的目的:
- 开发一种简单的方法来调整P3HT的有效区域规律性.
- 调查修改的P3HT区域规律性对BHJ形态和光伏性能的影响.
- 为了比较BHJ的热稳定性,它与不同的P3HT区域规律性混合.
主要方法:
- 通过将3,4-dihexylthiophene作为共称物来合成具有不同区域规律性的P3HT.
- 使用P3HT和烯衍生物PCBM制造大量的异质连接太阳能电池.
- 使用对纳米结构和相分离敏感的技术分析BHJ形态.
- 通过设备测试和回火研究来评估光伏性能和热稳定性.
主要成果:
- 通过引入3,4-dihexylthiophene,建立了一种方法来有效调整P3HT的区域规律性.
- 具有91%区域规律性的P3HT表现出与具有>96%区域规律性的P3HT相似的电子特性.
- 含有91%区域规律性P3HT的BHJ混合物在回火时证明了PCBM与互穿网络的增强热稳定性.
- 尽管区域规律性有所减少,但光伏的性能仍保持不变.
结论:
- 通过共纳体的结合来调整P3HT区域规律性是一种可行的策略,可以提高BHJ形态稳定性.
- 较低的区域规律性P3HT (约91%) 可以导致更强大的有机太阳能电池设备,而不会牺牲电子性能.
- 这种方法为改善聚合物光伏的长期运行稳定提供了一条途径.
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