Luminescence investigations of Ce3+ doped CaS nanophosphors

Vinay Kumar; Shreyas S. Pitale; Varun Mishra; I. M. Nagpure; M. M. Biggs; O. M. Ntwaeaborwa; H. C. Swart

doi:10.1016/j.jallcom.2009.11.076

Luminescence investigations of Ce³⁺ doped CaS nanophosphors

Vinay Kumar, Shreyas S. Pitale, Varun Mishra, I. M. Nagpure, M. M. Biggs, O. M. Ntwaeaborwa, H. C. Swart

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

51 Citations (Scopus)

Abstract

Ce³⁺ doped CaS nanophosphors were synthesized using the chemical co-precipitation method. The samples were characterized using X-ray diffraction, transmission electron microscopy, electron dispersive X-ray spectroscopy, UV-vis absorption spectroscopy and photoluminescence (PL) spectroscopy. The PL emission peaks of both the ²D(5d) →²F_5/2 (4f) and ²D(5d) →²F_7/2(4f) transitions of the Ce³⁺ ion were blue-shifted from the normal PL emission of bulk CaS:Ce at 517 nm, suggesting that the particle sizes of CaS:Ce phosphors synthesized in this study were in the nanometer scale. The effect of different dopant concentrations on the PL emission intensity was also investigated. The maximum PL emission intensity was observed when CaS was doped with 0.04 mol% of the Ce³⁺. Compared with commercial phosphors (CaS:Ce), the decay lifetime of the present samples was found to be longer in the order of a few milliseconds probably due to increased radiative relaxation processes.

Original language	English
Pages (from-to)	L8-L12
Journal	Journal of Alloys and Compounds
Volume	492
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2009.11.076
Publication status	Published - 4 Mar 2010
Externally published	Yes

Keywords

Alkaline earth sulfide
Luminescence
Nanophosphors

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2009.11.076

Cite this

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title = "Luminescence investigations of Ce3+ doped CaS nanophosphors",

abstract = "Ce3+ doped CaS nanophosphors were synthesized using the chemical co-precipitation method. The samples were characterized using X-ray diffraction, transmission electron microscopy, electron dispersive X-ray spectroscopy, UV-vis absorption spectroscopy and photoluminescence (PL) spectroscopy. The PL emission peaks of both the 2D(5d) → 2F5/2 (4f) and 2D(5d) → 2F7/2(4f) transitions of the Ce3+ ion were blue-shifted from the normal PL emission of bulk CaS:Ce at 517 nm, suggesting that the particle sizes of CaS:Ce phosphors synthesized in this study were in the nanometer scale. The effect of different dopant concentrations on the PL emission intensity was also investigated. The maximum PL emission intensity was observed when CaS was doped with 0.04 mol% of the Ce3+. Compared with commercial phosphors (CaS:Ce), the decay lifetime of the present samples was found to be longer in the order of a few milliseconds probably due to increased radiative relaxation processes.",

keywords = "Alkaline earth sulfide, Luminescence, Nanophosphors",

author = "Vinay Kumar and Pitale, {Shreyas S.} and Varun Mishra and Nagpure, {I. M.} and Biggs, {M. M.} and Ntwaeaborwa, {O. M.} and Swart, {H. C.}",

year = "2010",

month = mar,

day = "4",

doi = "10.1016/j.jallcom.2009.11.076",

language = "English",

volume = "492",

pages = "L8--L12",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

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TY - JOUR

T1 - Luminescence investigations of Ce3+ doped CaS nanophosphors

AU - Kumar, Vinay

AU - Pitale, Shreyas S.

AU - Mishra, Varun

AU - Nagpure, I. M.

AU - Biggs, M. M.

AU - Ntwaeaborwa, O. M.

AU - Swart, H. C.

PY - 2010/3/4

Y1 - 2010/3/4

N2 - Ce3+ doped CaS nanophosphors were synthesized using the chemical co-precipitation method. The samples were characterized using X-ray diffraction, transmission electron microscopy, electron dispersive X-ray spectroscopy, UV-vis absorption spectroscopy and photoluminescence (PL) spectroscopy. The PL emission peaks of both the 2D(5d) → 2F5/2 (4f) and 2D(5d) → 2F7/2(4f) transitions of the Ce3+ ion were blue-shifted from the normal PL emission of bulk CaS:Ce at 517 nm, suggesting that the particle sizes of CaS:Ce phosphors synthesized in this study were in the nanometer scale. The effect of different dopant concentrations on the PL emission intensity was also investigated. The maximum PL emission intensity was observed when CaS was doped with 0.04 mol% of the Ce3+. Compared with commercial phosphors (CaS:Ce), the decay lifetime of the present samples was found to be longer in the order of a few milliseconds probably due to increased radiative relaxation processes.

AB - Ce3+ doped CaS nanophosphors were synthesized using the chemical co-precipitation method. The samples were characterized using X-ray diffraction, transmission electron microscopy, electron dispersive X-ray spectroscopy, UV-vis absorption spectroscopy and photoluminescence (PL) spectroscopy. The PL emission peaks of both the 2D(5d) → 2F5/2 (4f) and 2D(5d) → 2F7/2(4f) transitions of the Ce3+ ion were blue-shifted from the normal PL emission of bulk CaS:Ce at 517 nm, suggesting that the particle sizes of CaS:Ce phosphors synthesized in this study were in the nanometer scale. The effect of different dopant concentrations on the PL emission intensity was also investigated. The maximum PL emission intensity was observed when CaS was doped with 0.04 mol% of the Ce3+. Compared with commercial phosphors (CaS:Ce), the decay lifetime of the present samples was found to be longer in the order of a few milliseconds probably due to increased radiative relaxation processes.

KW - Alkaline earth sulfide

KW - Luminescence

KW - Nanophosphors

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DO - 10.1016/j.jallcom.2009.11.076

M3 - Letter

AN - SCOPUS:76549100681

SN - 0925-8388

VL - 492

SP - L8-L12

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

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