Excited state dynamics of organic semi-conducting materials

被引：6
|
作者：
Ghiggino, Kenneth P. [1 ]
Tilley, Andrew J. [1 ,2 ]
Robotham, Benjamin [1 ]
White, Jonathan M. [1 ,2 ]
机构：
[1] Univ Melbourne, Sch Chem, Melbourne, Vic, Australia
[2] Univ Melbourne, Mol Sci & Biotechnol Inst Bio21, Parkville, Vic 3010, Australia
来源：
FARADAY DISCUSSIONS | 2015年 / 177卷
基金：
澳大利亚研究理事会;
关键词：
LIGHT-EMITTING-DIODES; RESONANCE ENERGY-TRANSFER; MEH-PPV CHAINS; CONJUGATED POLYMERS; SOLAR-CELLS; ROOM-TEMPERATURE; FLUORESCENCE; PERFORMANCE; OLIGOMERS; DERIVATIVES;
D O I：
10.1039/c4fd00171k
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Time-resolved absorption and emission spectroscopy has been applied to investigate the dynamics of excited state processes in oligomer models for semi-conducting organic materials. Following the photo-excitation of a pentamer oligomer that is a model for the conjugated polymer MEH-PPV, an ultrafast component of a few picoseconds is observed for the decay of the initially formed transient species. Variable temperature absorption and emission spectra combined with X-ray crystallography and calculations support the assignment of this rapid relaxation process to an excited state conformational rearrangement from non-planar to more planar molecular configurations. The implications of the results for the overall photophysics of conjugated polymers are considered.
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页码：111 / 119
页数：9
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