Citas bibligráficas
Ayala, Z., (2019). Caracterización óptica, eléctrica y fotovoltaica de nanopartículas de ferrita de bismuto (α-BiFeO3), producido por combustión en solución [Tesis, Universidad Nacional de Ingeniería]. http://hdl.handle.net/20.500.14076/20672
Ayala, Z., Caracterización óptica, eléctrica y fotovoltaica de nanopartículas de ferrita de bismuto (α-BiFeO3), producido por combustión en solución [Tesis]. PE: Universidad Nacional de Ingeniería; 2019. http://hdl.handle.net/20.500.14076/20672
@mastersthesis{renati/1749876,
title = "Caracterización óptica, eléctrica y fotovoltaica de nanopartículas de ferrita de bismuto (α-BiFeO3), producido por combustión en solución",
author = "Ayala Capra, Zait Becker",
publisher = "Universidad Nacional de Ingeniería",
year = "2019"
}
This research paper shows the optical, electrical and photovoltaic characterization of Bismuth Ferrite powders (BiFeO3), semiconductor with perovskite type structure and R3c space group, with the purpose of reproducing the photovoltaic effect in a multiferroic material. The synthesis was carried out by means of the combustion method using urea and glycine as solid fuels. The material was analyzed at different heat treatment temperatures, achieving a better crystallinity of BiFeO3 powders at 600 °C. Through characterization by X-ray diffraction (DRX), it was observed that the pure BiFeO3 phase was obtained; by X-ray spectroscopy by energy dispersion (EDS), the presence of all the elements that compose them Bi (19.58 ± 0.42%), Fe (21.70 ± 1.70%) and O (58.72 ± 1.28%) respectively were identified as better results; by scanning electron microscopy (SEM), the microscopic images of the material were obtained, which show an elliptical and hexagonal nanoparticle growth based on the increase in heat treatment and by transmission electron microscopy (TEM) the presence of nanoparticles is confirmed , with sizes approximately between 40 - 100 nm. with inter-planar distances between 1.71 – 2.64 Ȧ. In the optical characterization, by means of UV-Visible spectroscopy, the prohibited band (Band Gap) was found in the BiFeO3 powders in the range of 2.14 - 2.48 eV, which have a strong wavelength absorption between 400 - 525 nm. of visible light. In the electrical characterization for the current density and voltage (J - V) curve, it showed a linear graph where an open circuit voltage VOC = 3.4 V was found, the resistance and resistivity values obtained by the 4-point method are found in the range of semiconductors 108 and 10-3 Ω.cm., obtaining the best result ρ = 0.48 × 106 Ω.cm. The photovoltaic effect was measured by acquiring the current-intensity characteristics under a laser illumination with a wavelength of 405 nm. (hυ = 3.06 eV), generating a current of 0.2 nA.
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