UV and ozone influence on the conductivity of ZnO thin films.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorGonçalves, G.-
Autor(es): dc.creatorPimentel, A.-
Autor(es): dc.creatorFortunato, E.-
Autor(es): dc.creatorMartins, R.-
Autor(es): dc.creatorQueiroz, E. L.-
Autor(es): dc.creatorBianchi, Rodrigo Fernando-
Autor(es): dc.creatorFaria, Roberto Mendonça-
Data de aceite: dc.date.accessioned2019-11-06T13:32:19Z-
Data de disponibilização: dc.date.available2019-11-06T13:32:19Z-
Data de envio: dc.date.issued2015-03-25-
Data de envio: dc.date.issued2015-03-25-
Data de envio: dc.date.issued2006-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/4778-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/557551-
Descrição: dc.descriptionComplex impedance measurements were used to analyze the influence of ultraviolet and ozone gas on the electronic behaviour of ZnO films grown by rf magnetron sputtering. The data show that UV exposure strongly increases the ac conductivity of the film at very low frequencies, and that after ozone exposure it recovers the original value. At high frequencies, however, UV-light exposure it does not change the conductivity but the ozone acts in the sense to decrease it. Two distinct mechanisms, related to two relaxation time distributions are clearly observed: they are superimposed in the virgin sample, but they split forming two semicircles in the z00(f) z0 (f) diagrams when the samples are treated with UV and/or ozone gas. A combination of the bruggeman effective medium approximation (BEMA) with the random free energy barrier model is used to fit the data and to explain the ac conductivity variation phenomena observed.-
Idioma: dc.languageen-
Direitos: dc.rightsO Periódico Journal of Non-Crystalline Solids concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3565381158241.-
Palavras-chave: dc.subjectSolar cells-
Palavras-chave: dc.subjectSemiconductors-
Palavras-chave: dc.subjectSensors-
Palavras-chave: dc.subjectConductivity-
Título: dc.titleUV and ozone influence on the conductivity of ZnO thin films.-
Aparece nas coleções:Repositório Institucional - UFOP

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