Localized triplet excitations and the effect of photo-oxidation in ladder-type poly(p-phenylene) and oligo(p-phenylene)

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dc.contributorVirginia Techen
dc.contributor.authorList, E. J. W.en
dc.contributor.authorPartee, J.en
dc.contributor.authorShinar, J.en
dc.contributor.authorScherf, U.en
dc.contributor.authorMullen, K.en
dc.contributor.authorZojer, E.en
dc.contributor.authorPetritsch, K.en
dc.contributor.authorLeising, G.en
dc.contributor.authorGraupner, W.en
dc.contributor.departmentPhysicsen
dc.date.accessed2013-12-18en
dc.date.accessioned2014-02-11T13:45:59Zen
dc.date.available2014-02-11T13:45:59Zen
dc.date.issued2000-04-15en
dc.description.abstractThe photophysics of methyl-bridged poly(para-phenylene)-type ladder polymer (m-LPPP) and oligomer films and solutions is described and discussed. The spin sensitive properties, such as the formation and properties of polaron pairs and triplet excitons (TE's) were studied using X-band photoluminescence (PL) detected magnetic resonance (PLDMR). The PLDMR results and quantum chemical calculations show unambiguously that the TE wave-function extent is much smaller than that of the singlet exciton (SE). The weaker vibronic structure of the triplet photoinduced absorption (PA) band of m-LPPP relative to the singlet absorption is assigned to the small energy difference between the geometry of the lowest lying and excited triplet states. This is an additional indication of the strong localization of the triplet wave-function as compared to that of the SE. Finally, the influence of photo-oxidation on the PLDMR and PA is analyzed and discussed in relation to the photoconductivity of the materials.en
dc.identifier.citationList, EJW ; Partee, J ; Shinar, J ; et al., Apr 15, 2000. "Localized triplet excitations and the effect of photo-oxidation in ladder-type poly(p-phenylene) and oligo(p-phenylene)," PHYSICAL REVIEW B 61(16): 10807-10814. DOI: 10.1103/PhysRevB.61.10807en
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.61.10807en
dc.identifier.issn1098-0121en
dc.identifier.urihttp://hdl.handle.net/10919/25388en
dc.identifier.urlhttp://link.aps.org/doi/10.1103/PhysRevB.61.10807en
dc.language.isoen_USen
dc.publisherAmerican Physical Societyen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectdetected magnetic-resonanceen
dc.subjectlight-emitting-diodesen
dc.subjectconjugated polymeren
dc.subjectlowest singleten
dc.subjectstimulated-emissionen
dc.subjectcharged excitationsen
dc.subjectexcited-statesen
dc.subjectchain-lengthen
dc.subjectfilmsen
dc.subjectpoly(para-phenylene)en
dc.subjectPhysicsen
dc.titleLocalized triplet excitations and the effect of photo-oxidation in ladder-type poly(p-phenylene) and oligo(p-phenylene)en
dc.title.serialPhysical Review Ben
dc.typeArticle - Refereeden

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