摘要
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
In this paper, we studied the optical properties of the charge transfer system in poly[2 methoxy 5 (2′ ethyl hexyloxy) 1,4 phenylene vinylene](MEH PPV), which was doped by C 60 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 π π conjugated system in the base state in the films, which associated with the direct MEH PPV to C 60 charge transfer. In the excited state, the excited charge transfer advanced the restraint of luminant transiton process, which strengthen the PL quenching of MEH PPV.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2002年第4期535-537,共3页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金 (No 696870 04
No .1983 4 0 3 0 )资助项目
