Optical properties of Eu 3+ and Tb 3+ - doped tin dioxide nanoparticles prepared by coprecipitation method
Carregando...
Data
Data de publicação
2019
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
É parte de
SÃO PAULO SCHOOL OF ADVANCED SCIENCE ON MODERN TOPICS IN BIOPHOTONICS
Exportar
Resumo
Rare earth (RE) ion doped phosphors have attracted great interest during the past several decades due to their
unique physical and chemical properties. RE ions can display many meaningful properties in optics, electronics,
and magnetics, originating from f-f electronic transitions within the 4f shell. Doping of wide band gap of metaloxide
semiconductors with RE proved to be a successful tool for tailoring their electrical, optical and
microstructural properties. Tin dioxide combines high electrical conductivity with optical transparency. The
luminescence of pure SnO2, observed in the UV and/ or visible region (350-550 nm) is generally correlated with
the presence of crystalline defects, mainly oxygen vacancies, the most likely candidates for recombination centers
in emission processes for SnO2 samples. In this work, the incorporation of the Tb3+ and Eu3+ - doped SnO2
nanoparticles were prepared by coprecipitation method. In semicontuctor nanocrystals, lattice distortions near the
surface may produce distinct RE3+ environments, which may be enough to affect their band structure and to relax
the dipole-forbidden rule. SnO2:Eu3+ presents the appropriate energetic configuration, which takes effect the
luminescence in visible range. The ground state (7F0) and some of the metastable excited levels of Eu3+ ion
(5D0, 5D1) are situated in the band gap of SnO2. It allows to observe a typical orange/red emissiom from the
excited 5D0 to 7FJ (J=0-4) levels. SnO2: Tb3+ presents the transition 5D4→ 7F6 more intense than 5D4→7F5 and
exhibit bluish emission in chromaticity diagram. The CIE parameters and CCT values were also varied and the
emission color can be tuned from warm to cool light. In addition, this work opens the possibility to produce new
functionalized nanoparticles with control of luminescent properties for photonic and biomedical applications.
Como referenciar
SALVADOR, F.F.S.; FELINTO, M.C.F.C.; FRANCISCO, L.H.C.; BARBOSA, H.P.; BRITO, H.F. Optical properties of Eu 3+ and Tb 3+ - doped tin dioxide nanoparticles prepared by coprecipitation method. In: SÃO PAULO SCHOOL OF ADVANCED SCIENCE ON MODERN TOPICS IN BIOPHOTONICS, March 20-29, 2019, São Carlos, SP. Abstract... p. 45-45. Disponível em: http://repositorio.ipen.br/handle/123456789/30195. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.