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

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

Research output: Contribution to journal › Article › peer-review

95 Scopus citations

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.

Original language	English (US)
Pages (from-to)	551-557
Number of pages	7
Journal	Advanced Optical Materials
Volume	3
Issue number	4
DOIs	https://doi.org/10.1002/adom.201400562
State	Published - Apr 1 2015
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics

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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.",

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doi = "10.1002/adom.201400562",

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

Abstract

All Science Journal Classification (ASJC) codes

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