Sub-picosecond time-resolved photoluminescence in substituted thiophenes

被引：0
|
作者：
Wong, K.S. [1 ]
Lanzani, G. [2 ]
Barbarella, G. [3 ]
机构：
[1] Department of Physics, Hong Kong University of Science and Technology, Kowloon, Hong Kong
[2] Inst. of Math. and Phys., University of Sassari, Sassari, Italy
[3] ICOCEA-CNR, Bologna, Italy
来源：
Synthetic Metals | 1999年 / 101卷 / 01期
关键词：
Absorption spectroscopy - Aging of materials - Electron energy levels - Light emission - Photoluminescence;
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学科分类号：
摘要：
The emission properties of tetra and hexa methyl sulphanyl (SMe) substituted sexithiophenes have been studied in solution form using time-resolved up-conversion photoluminescence technique. The SMe substituents have an electron donating effect which compensates for the loss of φ-electron conjugation caused by the twisted conformation of the molecular geometry. Enhanced conjugation however does not lead to long recombination time due to the heavy atom effect, which increases the nonradiative decay rate.
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