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dc.contributor.authorSantos, L. F.-
dc.contributor.authorFaria, R. M.-
dc.contributor.authorDel Cano, T.-
dc.contributor.authorde Saja, J. A.-
dc.contributor.authorConstantino, C. J. L.-
dc.contributor.authorAmorim, C. A.-
dc.contributor.authorMergulhao, S.-
dc.identifier.citationJournal of Physics D-applied Physics. Bristol: Iop Publishing Ltd, v. 41, n. 12, p. 7, 2008.-
dc.description.abstractPersistent photoconductivity (PPC) in vanadyl phthalocyanine (VOPc) organic light-emitting diodes was investigated using photoconductive time response, photocurrent-voltage characteristics and charge extraction in linearly increasing voltage (CELIV) measurements. The experiments were performed in phase 1 (amorphous) and in phase 2 (crystalline) samples obtained by the physical vapour deposition (PVD) technique over ITO/glass electrodes with an Al covering electrode. The results indicated a photoconductivity with a long decay time in phase 1 VOPc described by a stretched exponential relaxation. The device showed a rectifying behaviour and the mobility of holes was measured by CELIV, following a dispersive model. In crystalline samples the PPC effect was not observed and the dominant mechanism of transport of holes was hopping in a Gaussian density of states.en
dc.publisherIop Publishing Ltd-
dc.sourceWeb of Science-
dc.titleObservation of persistent photoconductivity in vanadyl phthalocyanineen
dc.contributor.institutionUniversidade de São Paulo (USP)-
dc.contributor.institutionUniv Valladolid-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)-
dc.description.affiliationUniv São Paulo, Inst Fis São Carlos, BR-13566590 São Carlos, SP, Brazil-
dc.description.affiliationUniv Valladolid, Valladolid 47011, Spain-
dc.description.affiliationUniv Estadual Paulista, Fac Ciencias & Tecnol, BR-19060900 Presidente Prudente, SP, Brazil-
dc.description.affiliationUniversidade Federal de São Carlos (UFSCar), Dept Fis, BR-13565905 São Carlos, SP, Brazil-
dc.description.affiliationUnespUniv Estadual Paulista, Fac Ciencias & Tecnol, BR-19060900 Presidente Prudente, SP, Brazil-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal of Physics D: Applied Physics-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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