標題: Electroabsorption and Electrophotoluminescence of Poly(2,3-diphenyl-5-hexyl-p-phenylene vinylene)
作者: Mehata, Mohan Singh
Hsu, Chain-Shu
Lee, Yuan-Pern
Ohta, Nobuhiro
應用化學系
應用化學系分子科學碩博班
Department of Applied Chemistry
Institute of Molecular science
公開日期: 19-七月-2012
摘要: Electric-field-induced changes of the absorption, photoluminescence, and photoluminescence excitation spectra and the photoluminescence decay profile have been measured for poly(2,3-diphenyl-5-hexyl-p-phenylene vinylene). The magnitudes of the change of electric dipole moment and molecular polarizability of this compound have been determined for excitation into the first excited state having a strong absorption, and a large charge-separated character, which is relevant for photovoltaic devices, is confirmed. The photoluminescence of this compound is quenched by application of an electric field, and the quenching efficiency increases with decreasing excitation wavelength. Field-assisted dissociation is considered to occur from the photoexcited Franck-Condon state, resulting in the field-induced decrease in the population of the emitting state, which induce the quenching of photoluminescence.
URI: http://dx.doi.org/10.1021/jp302666f
http://hdl.handle.net/11536/150462
ISSN: 1932-7447
DOI: 10.1021/jp302666f
期刊: JOURNAL OF PHYSICAL CHEMISTRY C
Volume: 116
起始頁: 14789
結束頁: 14795
顯示於類別:期刊論文