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测量了不同富勒烯C60 掺杂浓度的聚对亚苯基亚乙烯衍生物 (MEH PPV)混合薄膜的紫外 可见吸收光谱、稳态荧光和时间分辨荧光光谱。观察到MEH PPV吸收峰受到明显的抑制以及荧光峰的猝灭。证明混合薄膜内 ,由于π π共轭体系的强相互作用在基态发生MEH PPV向C60 的电子转移 ,形成电荷转移络合物。在光激发下会发生MEH PPV向C60 的激发传递进一步抑制了发光跃迁过程 ,导致了MEH PPV荧光的强猝灭效应
The UV-vis absorption spectra, steady-state fluorescence and time-resolved fluorescence spectra of polyphenylenevinylene derivatives (MEH PPV) mixed films with different C60 doping levels were measured. It was observed that the MEH PPV absorption peak was significantly inhibited and the fluorescence peak quenched. It is shown that the charge transfer complex is formed in the mixed film by the electron transfer of MEH PPV to C60 due to the strong interaction of π π conjugated system in the ground state. The excitation transfer of MEH PPV to C60 under photoexcitation further inhibits the luminescence transition process, leading to a strong quenching effect of MEH PPV fluorescence