The Effect of Ionization Potential and Film Morphology on Exciplex Formation and Charge Generation in Blends of Polyfluorene Polymers and Silole Derivatives
The Effect of Ionization Potential and Film Morphology on Exciplex Formation and Charge Generation in Blends of Polyfluorene Polymers and Silole Derivatives
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DOI：
10.1021/jp9020307
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发表时间：
2009-07
影响因子：
3.7
通讯作者：
C. Dyer‐Smith;Jessica J. Benson-Smith;D. Bradley;H. Murata;W. Mitchell;S. Shaheen;S. Haque;J. Nelson
中科院分区：
文献类型：
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作者：
C. Dyer‐Smith;Jessica J. Benson-Smith;D. Bradley;H. Murata;W. Mitchell;S. Shaheen;S. Haque;J. Nelson
在聚芴-三芳基胺共聚物与噻咯衍生物的一系列共混膜中观察到激基复合物态的长寿命发射。发现激基复合物发射的能量与供体和受体的前线轨道之间的能量偏移相关，而激基复合物的产率更强烈地受共混物膜形态的影响。电荷分离发生在这些薄膜中，光伏器件的外量子效率被发现取决于能量和共混物膜的形态。
Long-lived emission from an exciplex state is observed in a series of blend films of polyfluorene−triarylamine copolymers with silole derivatives. The energy of the exciplex emission is found to correlate with the energy offset between the frontier orbitals of donor and acceptor, whereas the yield of the exciplex is more strongly influenced by blend film morphology. Charge separation occurs in these films, and the external quantum efficiency of photovoltaic devices is found to depend upon both the energetics and the morphology of the blend film.