Persistent and Photostimulated Red Emission in CaS: Eu2+,Dy3+ Nanophosphors

Diana C. Rodríguez Burbano, Suchinder K. Sharma, Pieter Dorenbos, Bruno Viana, John A. Capobianco

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

95 Citas (Scopus)

Resumen

The persistent and near-infrared photostimulated optical properties of CaS nanoparticles and CaS:Eu2+ and CaS:Eu2+,Dy3+ nanophosphors are presented. Proposed mechanisms are elucidated for both phenomena by carrying out wavelength-resolved, thermally stimulated luminescence (TSL) and photostimulated luminescence (PSL) measurements. After UV (254 nm) irradiation, blue persistent and near-infrared photostimulated luminescence is obtained due to the presence of intrinsic defects in CaS nanoparticles. By introducing Eu2+ as a dopant, the formation of shallow traps below the conduction band is observed and red persistent and near-infrared PSL is obtained. Dy3+ is added as a codopant to create shallow and near-infrared photostimulated deeper traps, lengthening the strong red persistent luminescence to 5 h and PSL time to 18 min.

Idioma originalInglés estadounidense
Páginas (desde-hasta)551-557
Número de páginas7
PublicaciónAdvanced Optical Materials
Volumen3
N.º4
DOI
EstadoPublicada - abr 1 2015
Publicado de forma externa

All Science Journal Classification (ASJC) codes

  • Materiales electrónicos, ópticos y magnéticos
  • Óptica y física atómica y molecular

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