Synthesis and physical characterization of KNbO3-based electro-ceramics

• Ano de defesa: 2021
• Autor(a) principal: Silva, Mykaelle Cristina Oliveira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Universidade Federal de Uberlândia; Brasil; Programa de Pós-graduação em Física
• Palavras-chave em Português: ceramics; KNbO3; vacancies; ferroelectrics; photovoltaic devices; CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::FISICA DA MATERIA CONDENSADA::MATERIAIS DIELETRICOS E PROPRIEDADES DIELETRICAS; Física; Sistema de energia fotovoltáica; Material cerâmico
• Link de acesso: https://repositorio.ufu.br/handle/123456789/33976; http://doi.org/10.14393/ufu.di.2021.690

KNbO3-based ferroelectric materials have been largely investigated as a result of many interesting physical properties that make them suitable for designing multifunctional elec- tronic components. In particular, ferroelectric (1 − x)KNbO3 − xBaNi1/2Nb1/2O3−δ (KBNN) solid solutions have received special attention for optical applications, including for high-performance photovoltaic devices. In this work, KBNN ceramics were produced via conventional sintering process (solid-state reaction), and the structural, microstruc- tural, electrical and optical properties were investigated. The results were analyzed and discussed in terms of the e ect from structural oxygen vacancy defects in such materials and from the grain size, in the speci c case of the observed electrical response. Overall, the results suggest these perovskite-structured semiconducting ferroelectric oxides as a good alternative for solar cell applications.