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Synthesis and photovoltaic characterization of thin films based on ferroelectric and multiferroic perovskite for solar cells application

Grant number: 19/03110-8
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): July 01, 2019
Effective date (End): June 30, 2021
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal Investigator:José Antonio Eiras
Grantee:Mahmoud Saleh Mohammed Alkathy
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Associated research grant:17/13769-1 - Multiferroic and ferroelectric materials for energy converters: synthesis, properties, phenomenology and applications, AP.TEM

Abstract

The worldwide energy crisis has motivated the search for new sources of clean and renewable energy, among which the use of the photovoltaic effect for the capture of solar energy has been highlighted. Among various types of materials that can be used for solar cell applications ferroelectric and multiferroic perovskite structures have received great attention in recent years. In this project, thin films of ferroelectric and multiferroic perovskite will be deposited by "RF Sputtering" aiming the optimization of their photovoltaic properties. Among the systems we propose to investigate in this project are complex perovskites of Pb (Fe, B) O3 (B = Nb, W, Ta, Ti) and solid solutions of Pb (Fe, B) O3 - Pb (Zr, Ti) O3, in addition to lead-free perovskites based on K (Na, Nb) O3. The various parameters that influence the photovoltaic effect in these systems, such as band gap, spontaneous/remnant polarization, electrical conductivity, electrode/interface properties, among others, will be investigated by optical, electrical, dielectric and ferroelectric techniques, in macroscopic and nanoscopic scale , aiming at understanding and optimizing the photovoltaic response. In the compositions, in which the absorption band lies the central region of the solar spectrum, the photovoltaic efficiency will be determined in prototypes of solar cells. (AU)