Charge Separation and Recombination at Conjugated-Polymer-Based Heterojunction Studied by Transient Absorption Spectroscopy

共轭聚合物/富勒烯异质结构是通过在具有热交联侧链的富勒烯衍生物的不溶性膜的顶部旋涂共轭聚合物来设计的。利用这种定义明确的D/A异质结构系统，可以从荧光猝灭数据估计共轭聚合物中的激子扩散长度。在D/A接口的电荷产生和复合动力学的直接观察也进行瞬态吸收光谱。

Conjugated polymer/fullerene heterostructures are designed by spin-coating a conjugated polymer on top of the insoluble film of the fullerene derivative with thermally cross-linkable side chains. With this well-defined D/A heterostructure system, an exciton diffusion length in the conjugated polymer can be estimated from the fluorescence quenching data. The direct observation of charge generation and recombination dynamics at the D/A interface is also performed by transient absorption spectroscopy.