Metastable polaron supporting phase in poly-p-phenylene films induced by UV illumination

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dc.creatorDrori, T.
dc.creatorGershman, E.
dc.creatorSheng, C. X.
dc.creatorEichen, Y.
dc.creatorVardeny, Z. V.
dc.creatorEhrenfreund, E.
dc.date2006-08-22
dc.date.accessioned2026-07-07T08:19:44Z
dc.date.available2026-07-07T08:19:44Z
dc.descriptionWe discovered a new metastable polaron-supporting phase in pristine films of a soluble derivative of poly-p-phenylene vinylene (MEH-PPV) that is induced by UV illumination. In the initial un-illuminated phase A, the films do not show long-lived photogenerated polarons. However, prolonged UV illumination for several hours induces a reversible, me-tastable phase B that shows abundant long-lived photogenerated polarons. Phase B films transform back to the original phase A within 1/2 hour in the dark at room temperature. We propose a reversible mechanism in which UV illumination creates metastable deep defects that substantially increase the photogenerated polaron lifetime.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0608471
dc.identifierhttp://arxiv.org/abs/cond-mat/0608471
dc.identifierPhys. Rev. B 76, 033203 (2007)
dc.identifierdoi:10.1103/PhysRevB.76.033203
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/134867
dc.subjectOther Condensed Matter
dc.subjectMaterials Science
dc.titleMetastable polaron supporting phase in poly-p-phenylene films induced by UV illumination
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