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

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

doi:10.1002/adom.201400562

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

Título traducido de la contribución: Emisión roja persistente y fotoestimulada en CaS: Nanofosforos Eu2+,Dy3

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

Producción científica: Contribución a revista › Artículo de Investigación › revisión exhaustiva

169 Citas (Scopus)

Resumen

Se presentan las propiedades ópticas persistentes y fotoestimuladas en el infrarrojo cercano de las nanopartículas de CaS y de los nanofosforos CaS:Eu2+ y CaS:Eu2+,Dy3+. Se dilucidan los mecanismos propuestos para ambos fenómenos mediante la realización de medidas de luminiscencia térmicamente estimulada (TSL) y de luminiscencia fotoestimulada (PSL) resueltas en longitud de onda. Tras la irradiación UV (254 nm), se obtiene luminiscencia azul persistente y fotoestimulada en el infrarrojo cercano debido a la presencia de defectos intrínsecos en las nanopartículas de CaS. Al introducir Eu2+ como dopante, se observa la formación de trampas poco profundas por debajo de la banda de conducción y se obtiene PSL roja persistente y en el infrarrojo cercano. Se añade Dy3+ como codopante para crear trampas poco profundas y más profundas fotoestimuladas en el infrarrojo cercano, alargando la fuerte luminiscencia roja persistente a 5 h y el tiempo de PSL a 18 min.

Título traducido de la contribución	Emisión roja persistente y fotoestimulada en CaS: Nanofosforos Eu2+,Dy3
Idioma original	Inglés estadounidense
Páginas (desde-hasta)	551-557
Número de páginas	7
Publicación	Advanced Optical Materials
Volumen	3
N.º	4
DOI	https://doi.org/10.1002/adom.201400562
Estado	Publicada - abr 1 2015
Publicado de forma externa	Sí

ODS de las Naciones Unidas

Este resultado contribuye a los siguientes Objetivos de Desarrollo Sostenible

ODS 3: Salud y bienestar

Áreas temáticas de ASJC Scopus

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

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10.1002/adom.201400562

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

abstract = "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.",

author = "\{Rodr{\'i}guez Burbano\}, \{Diana C.\} and Sharma, \{Suchinder K.\} and Pieter Dorenbos and Bruno Viana and Capobianco, \{John A.\}",

note = "Publisher Copyright: {\textcopyright} 2015 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim.",

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doi = "10.1002/adom.201400562",

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T1 - Persistent and Photostimulated Red Emission in CaS

T2 - Eu2+,Dy3+ Nanophosphors

AU - Rodríguez Burbano, Diana C.

AU - Sharma, Suchinder K.

AU - Dorenbos, Pieter

AU - Viana, Bruno

AU - Capobianco, John A.

PY - 2015/4/1

Y1 - 2015/4/1

N2 - 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.

AB - 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.

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