Liu Xiu, Wang Wen-jun, Cai Zhi-gang, Jiang Yong-qiang, Wang Gong-ming
State Key Joint Lab. for Materials Modification by Laser, Ion, and Electron Beams, Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2002 Aug;22(4):535-7.
In this paper, we studied the optical properties of the charge transfer system in poly2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene, which was doped by C60 with different consistence, by means of ultraviolet-visible absorption spectrum, steady-state photoluminescence (PL) and time-resolved photoluminescence (TRPL). We observed the restraining effect of absorption peak and PL quenching of fluorescence, which is regarded as the formation of complex compound in the mixed conjugated polymer. The formation is the result of the strong interaction of pi-pi conjugated system in the base state in the films, which associated with the direct MEH-PPV to C60 charge transfer. In the excited state, the excited charge transfer advanced the restraint of luminant transition process, which strengthen the PL quenching of MEH-PPV.
在本文中，我们通过紫外可见吸收光谱、稳态光致发光（PL）和时间分辨光致发光（TRPL）研究了不同浓度C60掺杂的聚[2-甲氧基-5-（2'-乙基己氧基）-1,4-亚苯基亚乙烯基]（MEH-PPV）中电荷转移体系的光学性质。我们观察到吸收峰的抑制作用和荧光的PL猝灭，这被认为是混合共轭聚合物中形成了复合化合物。这种形成是薄膜基态中π-π共轭体系强烈相互作用的结果，它与从MEH-PPV到C60的直接电荷转移有关。在激发态下，激发的电荷转移促进了发光跃迁过程的抑制，从而增强了MEH-PPV的PL猝灭。
