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dc.contributor.authorMeng, HFen_US
dc.contributor.authorChang, VCHen_US
dc.date.accessioned2019-04-03T06:39:15Z-
dc.date.available2019-04-03T06:39:15Z-
dc.date.issued1999-11-15en_US
dc.identifier.issn1098-0121en_US
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevB.60.14242en_US
dc.identifier.urihttp://hdl.handle.net/11536/30964-
dc.description.abstractWe study the interaction of excitons and optical phonons in light-emitting conjugated polymers with the variational approach. The optical transition matrix elements for the phonon sidebands in the absorption and emission spectra an calculated. The electron-phonon coupling constant is determined by fitting the theoretical oscillator strengths of the emission sidebands with the experimental photoluminescence spectra for the various poly(p-phenylene vinylene) derivatives. Using this coupling constant, we predict that the absorption one-phonon sideband is as important as the zero-phonon sideband for the ideal systems. Taking the experimental data of the peak absorption coefficient as input, we obtain the optical gain coefficient for a wide range of exciton densities. The gain is found to be determined by the exciton density no by a general expression 1.98 x 10(-16)n(o) cm(2), which is in good agreement with experiments. [S0163-1829(99)06243-8].en_US
dc.language.isoen_USen_US
dc.titlePhonon sidebands and optical gain of light-emitting conjugated polymersen_US
dc.typeArticleen_US
dc.identifier.doi10.1103/PhysRevB.60.14242en_US
dc.identifier.journalPHYSICAL REVIEW Ben_US
dc.citation.volume60en_US
dc.citation.issue20en_US
dc.citation.spage14242en_US
dc.citation.epage14254en_US
dc.contributor.department物理研究所zh_TW
dc.contributor.departmentInstitute of Physicsen_US
dc.identifier.wosnumberWOS:000084015500047en_US
dc.citation.woscount5en_US
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