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Autor Hidalgo Alcalde, Pedro |
Documentos disponibles escritos por este autor (67)
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This paper presents cathodoluminescence, electrical and structural characteristics of (11-20)-oriented 4H-SiC substrates, aiming at determining properties of some extended defects. As-grown basal plane dislocations with the Burgers vector b = 1/[...]texto impreso
Hidalgo Alcalde, Pedro ; Ottaviani, L. ; Idrissi, H. ; Lancin, M. ; Martinuzzi, S. ; Pichaud, B. | E D P Sciences | 2004-07Silicon Carbide (SiC) is a wide band gap semiconductor, having opto-electronic properties that are suitable for many applications. Some structural defects due to crystal growth and/or doping technologies are commonly present in the substrates of[...]texto impreso
Rodríguez Fernández, José ; Carcelen, V. ; Hidalgo Alcalde, Pedro ; Vijayan, N. ; Piqueras de Noriega, Javier ; Sochinskii, N. V. ; Pérez, J. M. ; Dieguez, E. | Institute of Physics | 2004-01-21The cathodoluminescence (CL) technique is used to analyse the radiative recombination properties of four distinct silicon carbide (SiC) samples: a 6H-SiC n^+ -type Lely wafer, two off-axis 4H-SiC epitaxial layers of n type and p type, and a (11 [...]texto impreso
Hidalgo Alcalde, Pedro ; Méndez Martín, Bianchi ; Piqueras de Noriega, Javier ; Dutta, P: S. | Materials Research Society | 2000GaSb p-n junctions formed by Zn diffusion in Te-doped n-GaSb single crystalline wafers have been characterized by cathodoluminescence (CL) microscopy and by scanning tunneling spectroscopy. CL plane-view observations of the Zn diffused side enab[...]texto impreso
Plaza, J. L. ; Hidalgo Alcalde, Pedro ; Méndez Martín, Bianchi ; Piqueras de Noriega, Javier ; Dieguez, E. | Elsevier Science SA | 2002-04-30The defect structure of Te-doped GaSb samples co-doped with Er_2O_3 and grown by the vertical Bridgman technique has been analysed. This study was carried out for different Er and Te concentrations. The defect structure of the samples has been a[...]texto impreso
Maestre Varea, David ; Ramírez Castellanos, Julio ; Hidalgo Alcalde, Pedro ; Cremades Rodríguez, Ana Isabel ; Gónzalez Calbet, J.M. ; Piqueras de Noriega, Javier | Wiley-V C H Verlag Gmbh | 2007-04The defect structure of sintered SnO_2 was investigated by high-resolution transmission electron microscopy (HRTEM), cathodoluminescence (CL), and electrical measurements. HRTEM shows the presence of the SnO phase in the sintered samples as well[...]texto impreso
Crocco, J. ; Bensalah, H. ; Zheng, Q. ; Dierre, F. ; Hidalgo Alcalde, Pedro ; Carrascal, J. ; Vela, O. ; Piqueras de Noriega, Javier ; Dieguez, E. | IEEE-Inst Electrical Electronics Engineers Inc | 2011-08The Vertical Gradient Freeze (VGF) method has been used to grow high resistivity Cadmium Zinc Telluride (CZT) for high energy radiation applications. In this work, the effect of lapping and polishing the lateral edges of planar detectors is stud[...]texto impreso
Ramos, A. ; Urbieta Quiroga, Ana Irene ; Escalante, G. ; Hidalgo Alcalde, Pedro ; Espinós, J.P. ; Fernández Sánchez, Paloma | Elsevier | 2020-04-15The properties of ZnO based materials for ethanol detection have been studied. Cu doped samples obtained from different precursors have been investigated. ZnO and ZnS have been used as host and Cu and CuO as dopant sources. The sensing measureme[...]texto impreso
Hidalgo Alcalde, Pedro ; Méndez Martín, Bianchi ; Piqueras de Noriega, Javier ; Dutta, P: S. | Elsevier Science SA | 2001-03-22We report here the studies carried out in zinc diffused n-type GaSb by cathodoluminescence (CL) microscopy and by scanning tunneling spectroscopy. Samples with different diffusion profiles measured by secondary ion mass spectrometry (SIMS) were [...]texto impreso
The scope of this paper is to analyse the effect of Au and Cr impurities, diffused onto GaSb substrates on the formation of nanodots created by LEIS using Ar+ ions It is concluded that oblique incidence in rotating configuration delays the forma[...]texto impreso
Méndez Martín, Bianchi ; López, I. ; Alonso Orts, Manuel ; Sanz, A. ; Nogales Díaz, Emilio ; Hidalgo Alcalde, Pedro ; Piqueras de Noriega, Javier | Spie-Int Soc Optical Engineering | 2017-05-30The synthesis of complex nanostructures that combine materials and dimensionality, promises the ability to identify novel designs and architectures with enhanced properties that could be used in new devices. One of the building blocks in nanomat[...]texto impreso
López García, Iñaki ; Cebriano Ramírez, Teresa ; Hidalgo Alcalde, Pedro ; Nogales Díaz, Emilio ; Piqueras de Noriega, Javier ; Méndez Martín, Bianchi | American Institute of Materials Science (AIMS) | 2016A thermal evaporation method developed in the research group enables to grow and design several morphologies of semiconducting oxide nanostructures, such as Ga_2O_3, GeO_2 or Sb_2O_3, among others, and some ternary oxide compounds (ZnGa_2O_4, Zn[...]texto impreso
Herein, we report the influence of the surface conditions on the cathodoluminescence (CL) emissions from Zn_2GeO_4 nanowires and Zn_2GeO_4/SnO_2 heterostructures obtained by thermal evaporation technique. A Zn_2GeO_4 nanowire surrounded by a dis[...]texto impreso
Alemán, B. ; Hidalgo Alcalde, Pedro ; Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier | IOP publishing ltd | 2009-11-21Bi doped ZnO nanowires and rods have been grown by a catalyst free evaporation-deposition method with precursors containing either ZnO and Bi_2O_3 or ZnS and Bi_2O_3 powders. The use of ZnS as a precursor was found to lead to a higher density of[...]texto impreso
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Dolado Fernández, Jaime ; Martínez Casado, Ruth ; Hidalgo Alcalde, Pedro ; Gutiérrez, Rafael ; Dianat, Arezoo ; Cuniberti, Gianaurelio ; Domínguez-Adame Acosta, Francisco ; Díaz García, Elena ; Méndez Martín, Bianchi | Pergamon-Elsevier Science Ltd | 2020-09-01Achieving efficient and stable ultraviolet emission is a challenging goal in optoelectronic devices. Herein, we investigate the UV luminescence of zinc germanate Zn_2GeO_4 microwires by means of photoluminescence measurements as a function of te[...]texto impreso
Dolado Fernández, Jaime ; Renforth, Kate L. ; Nunn, James E ; Hindsmarsh, Steve A. ; Hidalgo Alcalde, Pedro ; Sánchez, Ana M. ; Méndez Martín, Bianchi | American Chemical Society | 2020-01Herein, we report the formation of a particular core-shell structure, with a zinc germanate (Zn_2GeO_4) nanowire core and a discontinuous shell of SnO_2 nanocrystals, obtained in a single-step process. We propose a growth model that combines the[...]