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Photoinduced change of dielectric permittivity in molecular doped polymer layer

Title
Photoinduced change of dielectric permittivity in molecular doped polymer layer
Authors
Sakai H.Murata H.Murakami M.Ohkubo K.Fukuzumi S.
Ewha Authors
Shunichi Fukuzumi
SCOPUS Author ID
Shunichi Fukuzumiscopus
Issue Date
2009
Journal Title
Applied Physics Letters
ISSN
0003-6951JCR Link
Citation
vol. 95, no. 25
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We demonstrate a large photoinduced change of dielectric permittivity due to the charge separated (CS) state of an electron donor-acceptor linked molecule, 6- [4′ -(N,N -diphenylamino)phenyl]-3-ethoxycarbonylcoumarin (DPA-CM), doped in a polymethylmethacryrate (PMMA) matrix. Dielectric permittivity of DPA-CM in PMMA film increases from 4.1 to 7.5 under photoirradiation. Electron spin resonance spectra of the films measured under photoirradiation clearly show the formation of the CS state of DPA-CM in PMMA matrix. The origin of the photoinduced change of the dielectric permittivity is ascribed to the realignment of dipole of the CS state of DPA-CM. © 2009 American Institute of Physics.
DOI
10.1063/1.3275800
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자연과학대학 > 화학·나노과학전공 > Journal papers
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