Banca de QUALIFICAÇÃO: FERNANDO VELCIC MAZIVIERO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : FERNANDO VELCIC MAZIVIERO
DATE: 26/02/2026
TIME: 10:00
LOCAL: Auditório do LABTAM
TITLE:

Electronic Structure and Composition-Property Relationships in Materials with Perovskite Structure: Implications for Photovoltaic Applications.

KEY WORDS:

Halide perovskites; Solar cells; Synthesis and structural modification; Optoelectronic properties

PAGES: 93
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Inorgânica
SPECIALTY: Físico Química Inorgânica
SUMMARY:

The growth in global energy demand and environmental concerns associated with greenhouse gas emissions have intensified the search for renewable and sustainable energy sources. In this context, solar energy stands out as a strategic alternative, although photovoltaic technology based on crystalline silicon still presents limitations related to the high energy cost of processing and the complexity of manufacturing. Among the various options, halogenated perovskites with ABX3 structure have stood out as promising for next-generation solar cells, due to their high power conversion efficiency, strong optical absorption, good charge transport, and wide compositional versatility. This thesis investigates structural and electronic modification strategies in halogenated perovskites with potential in photovoltaic applications, including both lead-based systems and Pb-free alternatives. Initially, the impact of partial ion substitution in CsPbI3 and CsPbBr3 was evaluated through computational modeling based on Density Functional Theory, combined with experimental validation. Next, manganese-based perovskites were explored as more environmentally sustainable alternatives, correlating chemical composition, crystalline structure, and optoelectronic properties. The results obtained contribute to a better understanding of the relationships between composition and property and their implications for the development of perovskite materials for solar energy conversion.

COMMITTEE MEMBERS:
Presidente - 349770 - DULCE MARIA DE ARAUJO MELO
Interna - 1979301 - RENATA MARTINS BRAGA
Externa à Instituição - ARUZZA MABEL DE MORAIS ARAUJO - UFRN