Functional properties of donor- and acceptor-co-doped high dielectric constant zinc oxide ceramics

Página do item simplificado
dc.creatorSilva, Raphael Lucas de Sousa e
dc.creatorBanerjee, Prasun
dc.creatorFranco Júnior, Adolfo
dc.date.accessioned2023-11-06T12:10:19Z
dc.date.available2023-11-06T12:10:19Z
dc.date.issued2019
dc.description.abstractIn this work we investigated the functional properties of a set of acceptor (Cu1+) and donor (Gd3+) codoped wurtzite ZnO ceramics Zn(1−x)(CuzGdy)xO for x = 0.01 synthesized by the pressure-less solid state sintering method. XRD and optical measurements established the substitution of dopant ions into zinc lattice sites directly. The co-doping process influenced the creation of oxygen vacancies which modified their electronic properties and decreased the band gap energy. The existence of such defects leads to non-radiative decay, which caused different electronic recombination in the luminescence emission. The samples exhibited a high dielectric constant (>= ∼103) with an acceptable low dielectric loss (tan δ ∼ 10−1) in the frequency range 10–103 Hz. The dielectric results were discussed in terms of different polarization effects that may be present in the lattice such as polaron-like electron transport/hopping, defect dipoles, and barrier layer capacitance effects. The presence of both donor (Gd3+) and acceptor (Cu1+) ions in ZnO decreased the dielectric loss in the materials and the most favorable balance between high dielectric constant and low dielectric loss properties was found. Impedance analysis ruled out any contribution from electrode–grain interfaces to the high-K (high dielectric constant) properties in pure and doped zinc oxide ceramics. The correlation between the physical properties studies are a guideline in the classificatory understanding of semiconductor materials.
dc.identifier.citationSILVA, Raphael Lucas de Sousa e; BANERJEE, Prasun; FRANCO JÚNIOR, Adolfo. Functional properties of donor- and acceptor-co-doped high dielectric constant zinc oxide ceramics. Physical Chemistry Chemical Physics, Cambridge, v. 21, p. 9456-9464, 2019. DOI: 10.1039/C9CP01140D. Disponível em: https://pubs.rsc.org/en/content/articlelanding/2019/CP/C9CP01140D. Acesso em: 4 set. 2023.
dc.identifier.doi10.1039/C9CP01140D
dc.identifier.issn1463-9076
dc.identifier.issne- 1463-9084
dc.identifier.urihttps://pubs.rsc.org/en/content/articlelanding/2019/CP/C9CP01140D
dc.language.isoeng
dc.publisher.countryGra-bretanha
dc.publisher.departmentInstituto de Física - IF (RMG)
dc.rightsAcesso Restrito
dc.titleFunctional properties of donor- and acceptor-co-doped high dielectric constant zinc oxide ceramics
dc.typeArtigo

Arquivos

Licença do Pacote
Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:
Baixar

Coleções

IF - Artigos publicados em periódicos