Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Oracio Barbosa-García"'
Autor:
Alejandra Castro-Carranza, James W. Ryan, Oracio Barbosa-García, J. C. Nolasco, Jürgen Gutowski, Mario Rodríguez, Gabriel Ramos-Ortiz, Juergen Parisi, Emilio Palomares, José-Luis Maldonado
We introduce the use of facilely synthesizable and low-bandgap boron chromophores as donors in planar heterojunction solar cells. We show that simple changes in the compositional properties of these molecules can improve the performance of the device
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fefb11672893afafd6c87ab47fcddb13
https://cronfa.swan.ac.uk/Record/cronfa53750
https://cronfa.swan.ac.uk/Record/cronfa53750
Autor:
J. Castañeda-Contreras, Marco-Antonio Meneses-Nava, M.V. Félix, R.A. Rodríguez, Oracio Barbosa-García, Roger Chiu-Zarate
Publikováno v:
Journal of Luminescence. 130:2356-2361
The intensity of erbium up-conversion luminescence could be limited by a saturation effect due to increased pump power. We studied the luminescence saturation of the 550 nm emission on erbium-doped, SiO2–TiO2 sol–gel powders under pulsed excitati
Autor:
Oracio Barbosa-García, Gabriel Ramos-Ortiz, Eduardo Arias, M. Olmos-López, Ivana Moggio, José-Luis Maldonado, Marco-Antonio Meneses-Nava
Publikováno v:
Optical Materials. 29:821-826
The influence of the buckminsterfullerene C60 on photocurrent generation and hole transport properties in polymer films of poly(styrene) (PS) doped with N,N′-bis-(3-tolyl)-N,N′-diphenyl-1,1′-biphenyl-4,4′-diamine (TPD), has been determined an
Autor:
M.V. Félix, Oracio Barbosa-García, R.A. Rodríguez-Rojas, J. Castañeda-Contreras, Marco-Antonio Meneses-Nava
Publikováno v:
Optical Materials. 29:38-42
Spectroscopic properties of erbium ions in SiO 2 -TiO 2 -Er 3+ powders are studied and the nature of the emissions discussed. A strong green luminescence and less intense red and blue emissions were observed in the samples when exciting at 490 nm, 53
Autor:
E De la Rosa-Cruz, S. Hinojosa, Oracio Barbosa-García, Gabriel Ramos-Ortiz, M. A. Meneses-Nava, José-Luis Maldonado
Publikováno v:
Optical Materials. 27:1839-1844
A poly-crystalline YAG matrix was obtained through the precipitation method; this matrix was single and co-doped with ytterbium and erbium ions, i.e., Yb:YAG, Er:YAG and Yb,Er:YAG. It is found that the measured luminescent properties are similar to t
Autor:
Marco-Antonio Meneses-Nava, J. F. Mosiño, J.L. Maldonado-Rivera, J. Castañeda-Contreras, Oracio Barbosa-García
Publikováno v:
Optical Materials. 27:301-305
The TiO2 content was changed from low to high concentration (5–70% molar) in binary erbium doped SiO2–TiO2 powder samples produced by the sol–gel method. Three pumping wavelengths 532, 979 and 1532 nm, were used to study the blue up-conversion
Autor:
J. F. Mosiño, S Hinojosa, Luis A. Diaz-Torres, Oracio Barbosa-García, M.A Santoyo, M. A. Meneses-Nava
Publikováno v:
Journal of Luminescence. :694-698
A comparison and discussion of the energy back transfer, migration of energy and direct energy transfer process, from Yb-to-Er and Er-to-Yb ions, in the luminescent system Yb, Er: YAG are presented. The sample crystal was excited with a tunable optic
Autor:
E De la Rosa-Cruz, J. F. Mosiño, Marco-Antonio Meneses-Nava, J. Castañeda, Oracio Barbosa-García
Publikováno v:
Journal of Luminescence. :504-509
The spectra of the two and three photon up-conversion process in SiO 2 -TiO 2 -doped erbium is studied and the nature of the red emission discussed. In both processes, the red emission ( 4 F 9/2, → 4 I 15/2 ) is measured, however, when pumped direc
Publikováno v:
Optical Materials. 18:321-329
Spectroscopic properties of Nd3+ in barium fluoroborophosphate glassy matrix have been analyzed by fitting the experimental data with the standard Judd–Ofelt theory. Various spectroscopic parameters, viz. radiative transition probabilities, radiati
Autor:
Oracio Barbosa-García, A.A Silva-Moreno, Luis A. Diaz-Torres, M. A. Meneses Nava, Georges Boulon, F. Carrillo Romo
Publikováno v:
Optical Materials. 16:221-226
Two sets of experimental data of the chromium emission, at short and long times, for the non-radiative energy transfer processes in Cr, Nd:GSGG (Gd 3 Sc 2 Ga 3 O 12 ) are analyzed. In contrast to previous analysis, our modeling allows calculating the