Direct evidence for singlet-triplet exciton annihilation in pi-conjugated polymers

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dc.contributorVirginia Techen
dc.contributor.authorList, E. J. W.en
dc.contributor.authorScherf, U.en
dc.contributor.authorMullen, K.en
dc.contributor.authorGraupner, W.en
dc.contributor.authorKim, C. H.en
dc.contributor.authorShinar, J.en
dc.contributor.departmentPhysicsen
dc.date.accessed2013-12-18en
dc.date.accessioned2014-02-11T13:45:54Zen
dc.date.available2014-02-11T13:45:54Zen
dc.date.issued2002-12-06en
dc.description.abstractA blend of two conjugated polymers with different optical band gaps and different triplet exciton (TE) magnetic resonance features was studied by means of photoinduced absorption (PA) and photoluminescence detected magnetic resonance. From the latter we find that a reduction of TE's on either of the two polymers enhances the radiative singlet exciton (SE) decay on both polymers nearly identically. The PA results rule out other possible mechanisms to yield this signal, except one: a long-range SE-TE annihilation due to a dipole-dipole transfer mechanism. Based on this finding, we calculate the transfer radius and quantify the annihilation process for this system and for other conjugated polymers.en
dc.identifier.citationList, EJW ; Scherf, U ; Mullen, K ; et al., Dec 15, 2002. "Direct evidence for singlet-triplet exciton annihilation in pi-conjugated polymers," PHYSICAL REVIEW B 66(23): 235203. DOI: 10.1103/PhysRevB.66.235203en
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.66.235203en
dc.identifier.issn1098-0121en
dc.identifier.urihttp://hdl.handle.net/10919/25364en
dc.identifier.urlhttp://link.aps.org/doi/10.1103/PhysRevB.66.235203en
dc.language.isoen_USen
dc.publisherAmerican Physical Societyen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectlight-emitting-diodesen
dc.subjectpoly(para-phenylene)-type ladder polymersen
dc.subjectdetected magnetic-resonanceen
dc.subjectenergy-transferen
dc.subjectspectroscopyen
dc.subjectpolaronsen
dc.subjectgapen
dc.subjectelectroluminescenceen
dc.subjectphotoluminescenceen
dc.subjectphosphorescenceen
dc.subjectPhysicsen
dc.titleDirect evidence for singlet-triplet exciton annihilation in pi-conjugated polymersen
dc.title.serialPhysical Review Ben
dc.typeArticle - Refereeden

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