5 research outputs found

    Efecto de la adici贸n de flu贸r en las propiedades superconductoras de la fase TlBa2Ca2Cu3Ox depositada sobre substratos policristalinos de plata

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    Se presentan resultados sobre la incorporaci贸n del flu贸r en la fase superconductora TlBa2Ca2Cu3Ox, obtenida como pel铆cula crecida sobre substratos de plata. La incorporaci贸n del flu贸r se realiz贸 por dos procesos: utilizando la difusi贸n simult谩nea del talio y flu贸r en el horno de dos zonas y otro incorporando el flu贸r desde el dep贸sito de la pel铆cula precursora. Con el primer proceso las cantidades incorporadas de flu贸r inhibieron la formaci贸n de la fase. En el segundo caso, despu茅s de la difusi贸n del talio se obtuvieron trazas de la fase objetivo

    Study of the effect of DMSO concentration on the thickness of the PSS insulating barrier in PEDOT:PSS thin films

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    One of the most used secondary dopants in thin film processing of PEDOT:PSS is dimethyl sulfoxide (DMSO). In this work, we present results that explain, from the point of view of impedance spectroscopy, the mechanism of the increase in the conductivity observed on films based on PEDOT:PSS. The results obtained with this technique, combined with others such as AFM, and Raman and UV鈥搗is鈥揘IR spectroscopies, clearly show that there is a thinning of the insulating barrier of PSS surrounding conductive grains of PEDOT. It is shown that the thickness of the insulating barrier is related strongly and inversely with the onset frequency of AC conductivity. However, this is not the only existing effect, because for values beyond the optimal concentration of DMSO, we observe a decrease in the conductivity related with an increase of the separation of the PEDOT grains. The AC measurements and the AFM images also show the clear interplay between the increase of the PEDOT average grain size and the separation between them

    Propiedades el茅ctricas, 贸pticas y estructurales de pel铆culas delgadas de SnO2 nanoestructuradas, depositadas a partir de acetilacetonatos

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    Pel铆culas delgadas de 贸xido de estano fueron depositadas mediante la t茅cnica de roc铆o pirol铆tico ultras贸nico. Las pel铆culas se depositaron sobre sustratos de vidrio empleando dicloruro de acetilacetonato de esta帽o [(C5H8O2)2SnCl2], como material fuente y N,N-DMF como solvente a temperaturas de 400掳C a 500 掳C. Se presentan propiedades 贸pticas y estructurales de las pel铆culas obtenidas utilizando un precursor organomet谩lico
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