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694 results on '"Falcony, C."'

108. Ultrasonic spray pyrolyzed copper oxide and copper-aluminum oxide thin films: optical, structural and electronic properties

Author

Paredes-Sánchez, C, primary, Sánchez-Alarcón, R I, additional, Hernández-Silva, O, additional, Lartundo-Rojas, L, additional, Alarcón-Flores, G, additional, Pérez-Cappe, E, additional, Mosqueda-Laffita, Y, additional, Mesa-Pérez, G, additional, Falcony, C, additional, Garduño-Wilches, I A, additional, Carmona-Téllez, S, additional, and Aguilar-Frutis, M, additional

Published
2018
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119. Tl-based films grown on silver tape substrates

Author

Falcony, C., Jergel, M., Morales, A., Garcia, M., Hernandez, R.T., De Ita, A., Cabanas-Moreno, J.G., Palacios G., J., and Martinez, R.

Subjects
High temperature superconductivity -- Research, High temperature superconductors -- Research, Thin films -- Research, Business, Electronics, Electronics and electrical industries
Abstract

A two-step procedure for producing Tl-based films on silver tape substrates has been developed. The Ba-Ca-Cu precursors were first deposited on a silver tape from an aerosol and then thallinated in a closed crucible with a source of Tl-oxide pellet. Scanning electron microscopy results indicate the formation of plate-like grains and strong c-axis orientation. The best films had a Tc values higher than 100 K. Pole figure measurements show good (001) bi-axial texturing.

Published
1999

127. Electrical, optical, and structural characteristics of Al2O3 thin films prepared by pulsed ultrasonic sprayed pyrolysis.

Author

Carmona-Tellez, S., Guzman-Mendoza, J., Aguilar-Frutis, M., Alarcon-Flores, G., Garcia-Hipolito, M., Canseco, M. A., and Falcony, C.

Subjects
ALUMINUM oxide, THIN films, PYROLYSIS, SURFACE roughness, INFRARED spectroscopy
Abstract

The optical, structural, and electrical characteristics of aluminum oxide thin films deposited by pulsed ultrasonic sprayed pyrolysis are reported. The films are deposited on crystalline silicon at temperatures from 400 to 550°C using a chemical solution of aluminum acetylacetonate, as source of aluminum, and N, N-dimethylformamide, as solvent. A H2O–NH4OH mist is supplied simultaneously during deposition to improve the films’ properties. The results showed that the properties of the as deposited films depended strongly on the number of pulses used and on the substrate temperature. The thickness of the films is under 300 Å and the best films’ properties showed an index of refraction close to 1.6 and a root mean square surface roughness of about 7.5 Å in average. Infrared spectroscopy shows that SiO2 is observed at the interface with silicon of the Al2O3 films and seemed to play, as expected, a dramatic role in the electrical characteristics of the interface. Films with a dielectric constant higher than 8 and an interface trap density at midgap in the 1010 eV-1 cm-2 range are obtained. Films deposited with three pulses and at 550 °C are able to stand an electric field up to 4 MV/cm. [ABSTRACT FROM AUTHOR]

Published
2008
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133. Luminescent properties of ZnS:Mn films deposited by spray pyrolysis

Author

Falcony, C., Garcia, M., Ortiz, A., and Alonso, J.C.

Subjects
Luminescence -- Research, Pyrolysis -- Research, Thin films -- Research, Physics
Abstract

The luminescent characteristics of ZnS:Mn films deposited by spray pyrolysis were investigated. The results showed that the films were polycrystalline and exhibited a hexagonal structure. A peak associated with the self-activated emission was observed along with chlorine impurities connected to these emissions.

Published
1992

134. Electrical, optical, and structural characteristics of [Al.sub.2][O.sub.3] thin films prepared by pulsed ultrasonic sprayed pyrolysis

Author

Carmona-Tellez, S., Guzman-Mendoza, Aguilar-Frutis, M., Alarcon-Flores, G., Garcia-Hipolito, M., Canseco, M.A., and Falcony, C.

Subjects
Aluminum oxide -- Structure, Aluminum oxide -- Electric properties, Aluminum oxide -- Optical properties, Dielectric heating -- Analysis, Pyrolysis -- Analysis, Physics
Abstract

The optical, structural, and electrical characteristics of aluminum oxide thin films deposited by pulsed ultrasonic sprayed pyrolysis are described. The results have shown that these films possessed high dielectric constant and very good optical and structural properties.

Published
2008

135. Structural and optical studies of Er 3+ -doped alkali/alkaline oxide containing zinc boro-aluminosilicate glasses for 1.5 μm optical amplifier applications

Author

Kaky, Kawa M., primary, Lakshminarayana, G., additional, Baki, S.O., additional, Lira, A., additional, Caldiño, U., additional, Meza-Rocha, A.N., additional, Falcony, C., additional, Kityk, I.V., additional, Taufiq-Yap, Y.H., additional, Halimah, M.K., additional, and Mahdi, M.A., additional

Published
2017
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138. Luminescent polystyrene films, a novel way to reduce styrofoam residues

Author

S. Carmona-Téllez, Alarcón-Flores, G., Zaleta-Alejandre, E., Rivera-Alvarez, Z., Meza-Rocha, A. N., Martínez-Martínez, R., Murrieta, H. S., Aguilar-Frutis, M., and Falcony, C.

Subjects
white light emission, Física, Astronomía y Matemáticas, polymeric films, Spray pyrolysis, polystyrene
Abstract

"Polystyrene (PS) films doped with blue, yellow and red organic pigments have been deposited on glass and on commercial LED chips by spray pyrolysis using recycled PS as precursor, at deposition rates between 100 and 200 A° /s. Doped films have roughness between 100 and 2500 °A depending on the kind of pigment used; the surface morphology shows that the organic pigments incorporate into the polystyrene host forming globular particles of about 2 ¹m in diameter. The organic pigments used have luminescent emissions peaked at 440, 509 and 590 nm. The introduction of the proper combination of pigments on the PS film deposited on the LED chips renders a white light emission with (0.29, 0.37) and (0.30, 0.33) CIE (Commission international de l’ ´eclairage) color coordinates. It was determined that the exposure to violet light degrades the luminescent characteristics, however, blue light is not energetic enough to cause a degradation of the luminescent layer over similar period of time."

Published
2015

139. Electrical and stoichiometric characteristics of CdTe films deposited by the hot-wall flash-evaporation technique.

Author

Félix-Valdéz, J., Falcony, C., Tufiño, M., Menezes, C., Dominguez, J. M., and Garcia, A.

Subjects
*CADMIUM compounds, *TELLURIDES, *POLYCRYSTALS, *PHOTOVOLTAIC cells
Abstract

Presents information on a study which examined the electrical and stoichiometric characteristics of polycrystalline cadmium telluride films deposited by the hot-wall flash-evaporation technique for photovoltaic cells. Methodology of the study; Results and discussion; Conclusions.

Published
1987

140. Degradation of the electrical characteristics of the Si–SiO2 interface induced by electron injection.

Author

Falcony, C. and Salas, F. H.

Subjects
*SEMICONDUCTORS, *SILICON oxide, *SILICON
Abstract

Examines the effects of electron injection on the electrical characteristics of the silicon-silicon oxide interface on metal-oxide-semiconductor type structures incorporating very thin oxide films. Method used in monitoring the changes induced by charge injection in the structures; Role of the silicon-rich-silicon oxide layer; Factor attributed to the shift in voltage of the anomalous peak.

Published
1986
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141. Photoluminescence characteristics of undoped and terbium chloride doped zinc oxide films deposited by spray pyrolysis.

Author

Falcony, C., Ortiz, A., García, M., and Helman, J. S.

Subjects
*PHOTOLUMINESCENCE, *ZINC oxide, *PYROLYSIS
Abstract

Presents a study which examined the photoluminescence characteristics of undoped and terbium chloride-doped zinc oxide films deposited by the spray pyrolysis technique. Information on the light emission of the doped films; Methodology; Decay of luminescence with time.

Published
1988
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148. Ultrasonic spray-pyrolyzed CuCrO2thin films

Author

Sánchez-Alarcón, R I, primary, Oropeza-Rosario, G, additional, Gutierrez-Villalobos, A, additional, Muro-López, M A, additional, Martínez-Martínez, R, additional, Zaleta-Alejandre, E, additional, Falcony, C, additional, Alarcón-Flores, G, additional, Fragoso, R, additional, Hernández-Silva, O, additional, Perez-Cappe, E, additional, Laffita, Yodalgis Mosqueda, additional, and Aguilar-Frutis, M, additional

Published
2016
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