Observation of persistent photoconductivity in vanadyl phthalocyanine

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorSantos, L. F.
dc.creatorFaria, R. M.
dc.creatorDel Cano, T.
dc.creatorde Saja, J. A.
dc.creatorConstantino, C. J. L.
dc.creatorAmorim, C. A.
dc.creatorMergulhao, S.
dc.date2014-05-20T13:23:07Z
dc.date2016-10-25T16:44:12Z
dc.date2014-05-20T13:23:07Z
dc.date2016-10-25T16:44:12Z
dc.date2008-06-21
dc.date.accessioned2017-04-05T19:56:38Z
dc.date.available2017-04-05T19:56:38Z
dc.identifierJournal of Physics D-applied Physics. Bristol: Iop Publishing Ltd, v. 41, n. 12, p. 7, 2008.
dc.identifier0022-3727
dc.identifierhttp://hdl.handle.net/11449/6925
dc.identifierhttp://acervodigital.unesp.br/handle/11449/6925
dc.identifier10.1088/0022-3727/41/12/125107
dc.identifierWOS:000256568000018
dc.identifierhttp://dx.doi.org/10.1088/0022-3727/41/12/125107
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/855734
dc.descriptionPersistent 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.
dc.languageeng
dc.publisherIop Publishing Ltd
dc.relationJournal of Physics D: Applied Physics
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.titleObservation of persistent photoconductivity in vanadyl phthalocyanine
dc.typeOtro


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