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Author Sutherland, D. G. ♦ Carlisle, J. A. ♦ Elliker, P. ♦ Fox, G. ♦ Hagler, T. W. ♦ Jimenez, I. ♦ Lee, H. W. ♦ Pakbaz, K. ♦ Terminello, L. J. ♦ Williams, S. C. ♦ Himpsel, F. J. ♦ Shuh, D. K. ♦ Tong, W. M. ♦ Jia, J. J. ♦ Callcott, T. A. ♦ Ederer, D. L.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ PHYSICS ♦ POLYMERS ♦ ELECTROLUMINESCENCE ♦ OXIDATION ♦ ABSORPTION SPECTROSCOPY ♦ PHYSICAL RADIATION EFFECTS ♦ DEGRADATION
Abstract The C1{ital s} and O1{ital s} core-level photoabsorption spectra of poly[2-methoxy,5-(2{prime}-ethyl- hexoxy)-1,4-phenylene vinylene] (MEH-PPV) before and after exposure O{sub 2} and broadband visible light were recorded to determine the degradation pathway for this polymer. The change in the O1{ital s} spectra as a function of exposure demonstrates that the O adds to the polymer chain to form a carbonyl group. Exposure to {ital only} O{sub 2} or {ital only} light causes no change in the C1{ital s} or O1{ital s} spectra. In the C1{ital s} spectra, the change in the dependence on the photon angle of incidence after exposure demonstrates that O attacks the polymer at the double bond in the vinyl group thereby altering the extended conjugation of the polymer. {copyright} {ital 1996 American Institute of Physics.}
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-04-01
Publisher Department Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publisher Place United States
Journal Applied Physics Letters
Volume Number 68
Issue Number 15
Organization Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)


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