VUV excited luminescence and thermoluminescence investigation on Er3+- or Pr3+-doped BaY2F8 single crystals
Carregando...
Data
2019
Data de publicação:
Autores IPEN
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Optical Materials
Resumo
Photoluminescence (PL), thermoluminescence (TL) emission spectra and TL glow curves of barium yttrium
fluoride (BaY2F8 – BaYF), undoped and doped with erbium (Er3+) or praseodymium (Pr3+) were measured to
investigate the fundamental absorption (band gap – Eg), the nature of the trapping centers, as well as the
electronic transitions of Ln3+ in BaYF host. The band gap energy Eg of BaY2F8 was determined by vacuum
ultraviolet (VUV) excitation measurements to be around 11.2 eV. Additionally, the electronic transition from
excited states of Ln3+ ions and the exciton state were also identified. TL emission spectra showed that the TL
emission of doped samples is related to the Ln3+ ion, indicating that the related host trapping centers are not
affected by the new trapping centers originated due the dopant ions. Trap depths were calculated by fitting the
glow curves using a first order kinetics model. Host-related trapping centers were attributed to intrinsic defects
such as Vk and F centers and the new TL peaks observed for Ere and Pr-doped samples was associated to the
electrons trapping centers. These results lead us to propose a simple model to explain the origin of the TL
emission in BaYF.
Como referenciar
ANDRADE, ADRIANO B.; BISPO, GIORDANO F. da C.; MACEDO, ZELIA S.; BALDOCHI, SONIA L.; YUKIHARA, EDUARDO G.; VALERIO, MARIO E.G. VUV excited luminescence and thermoluminescence investigation on Er3+- or Pr3+-doped BaY2F8 single crystals. Optical Materials, v. 90, p. 238-243, 2019. DOI: 10.1016/j.optmat.2019.02.044. Disponível em: http://repositorio.ipen.br/handle/123456789/30054. Acesso em: 28 Mar 2024.
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.