Study of the optical and photovoltaic properties in nanoparticles of BiFeO3
Por:
Ayala Z.B., Peñalva J., Hernández J.M., Loro H., Eyzaguirre C.
Publicada:
1 ene 2020
Categoría:
Physics and astronomy (miscellaneous)
Resumen:
Bismuth ferrite ceramic powders (BiFeO3) were synthesized by a combustion reaction in solution, using the mixture of urea and glycine as fuels, whose objectives were to improve their optical, electrical and photovoltaic response properties. X-ray diffraction analysis indicated the formation of the single phase BiFeO3. Transmission electron microscopy (TEM) shows images of uniform nanoparticles of 70 nm on average. Through diffuse reflectance we obtain a band gap with a direct electronic transition of 2.14 eV, this value presents an improvement compared to that reported by other authors in BiFeO3 ceramic powders. The value of the resistivity obtained by the 4-pointed method was ? = 0.486 × 106 O.cm, checking that our material is a semiconductor. Finally, by building a prototype of Ag/BiFeO3/Ag, with visible light (? = 405 nm), a photovoltaic response of 0.2 nA at room temperature was achieved. © Published under licence by IOP Publishing Ltd.
Filiaciones:
Universidad Nacional de Ingeniería, Departamento de Ciencias, Lima, 25, Peru
Univesidad Nacional Autónoma de México, Instituto de Física, Ciudad de México, Mexico
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