【摘要】 借助荧光猝灭可以观测和研究导电高聚物与富勒烯之间的电子转移效率及机理.但对链长较短的低聚噻吩(2T~7T)来说,由于不能避开富勒烯的吸收范围而仅对低聚噻吩进行选择性激发,从而导致获取的猝灭率失实.给出了富勒烯吸收作用对荧光猝灭效率影响的校正方法、物理模型和数学推导过程.校正后,在低聚噻吩/富勒烯混合液中荧光光谱波形轮廓与低聚噻吩溶液中荧光光谱波形轮廓的一致性,证实了该校正方法的可行性.更多还原

【Abstract】 The efficiency and mechanism of electron transfer in conjugated polymers/fullerenes mixtures can be investigated by means of photoluminescence (PL) quenching. But due to the overlapping between the absorption spectra of oligothiophenes and fullerenes, the oligothiophenes in oligothiophenes/fullerenes mixtures in solution can not be selectively excited. As a consequence of such overlapping, the measured results leads to an artifact of a strong PL quenching efficiency. Therefore, a physical model to correct the PL quenching efficiency was developed, which was affected by the fullerene absorption. The feasibility of the approach has been proved by the agreement between the PL spectral profiles of oligothiophenes/fullerenes mixtures and those of oligothiophenes in solution after correction.更多还原