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Synthesis of KBiFe2O5 phase (KBFO) with perovskite type structure with potential for application in solar cells

Grant number: 18/06232-4
Support type:Scholarships in Brazil - Master
Effective date (Start): September 01, 2018
Effective date (End): February 29, 2020
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal researcher:Márcio Raymundo Morelli
Grantee:Jhonata Rafael Verza
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil

Abstract

The search for renewable energy sources is something widespread in society, because the non-renewable sources have the same scarce and yet they disfavor the environment, as well as, have a great interest in solar energy, because the sun is a clean source and in practically inexhaustible. As solar cells are triggered by a solar power converter in electric power, this way, the search acquires active energy from solar cells of materials with low-energy band (Eg) gaps, where the optimal value is approximately 1.4 eV. The Perovskites are materials that present a great potential of application and can present an emission of calories of solar energy in greater than 20%. The iron-ceramic oxides present band gap between 2.7-4 eV, high values for the application of solar cells, thus the discovery of complex perovskitas, particularly the KBiFe2O5 (KBFO), with low for example, has been motivated the Development of this phase for solar cells. The journeys that can be obtained with high homogeneity, with the size of small and medium and low variables are essential for obtaining solar cells. This form of dissertation is done in a single-phase system, with nanometrics and with small Gap Band, for this, the following version of mixture of oxides is used, by reaction of combustion and hydrothermal. X-ray difference (XRD), thermogravimetric Analysis (TG) and differential exploratory calorimetry (DSC), specific surface area (ASE), electronic scanning (VEM) microscopy and transmission (TEM), and absorption spectroscopy in the region of Ultraviolet-Visible (UV-Vis), among others. It is noteworthy that a literature is scarce in KBFO studies, especially with a single account of the use of the hydrothermal method of post synthesis for the development of that phase. (AU)

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