Energy transfer process in CaSO4:Tb,Ce phosphor

Sanaye, S.S.; Dhabekar, Bhushan; Kumar, Rajesh; Menon, S.N.; Shinde, Seema; Rao, T.K. Gundu; Bhatt, B. C.

doi:10.1016/s0022-2313(03)00091-7

Cited by 31 publications

(14 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Besides the brightness, one important factor in selecting phosphor in color co-ordinates as was reported [21,35]. Ce 3+ known to be a sensitizer for Tb 3+ in many hosts [9][10][11][12][13][14]31]. The emission efficiency is the preferential factor for designing a new phosphor is then,we concluded that co-doping the Ce 3+ ions is a helpful way to modify the emission band of the KBr:Tb phosphor and thereby brightness can be enhanced successfully.…”

Section: Photoluminescencesupporting

confidence: 51%

“…We have recently studied the effect of introducing Ce 3+ and Tb 3+ in potassium iodide and some interesting results were obtained [4]. As a continuation of this work,we studied the effect of impurities Ce 3+ and Tb 3+ in potassium bromide.Co-doping of Ce 3+ with Tb 3+ doped luminescent materials is known to improve the luminescence efficiency [9][10][11][12][13][14]. Of several rare earth ions, Eu 2+ and Ce 3+ ions show a broad band emission in most host matrix [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Luminescence Properties and Optical Absorption of X ray-Irradiated KBr: Ce3+, Tb3+ Crystals

Bangaru¹,

Saradha²,

Muralidharan

2015

J Fluoresc

View full text Add to dashboard Cite

This paper reports that KBr doubly doped with Tb(3+) and Ce(3+) were prepared by Bridgman-Stockbarger method and characterized by Optical absorption, Photoluminescence (PL), Thermoluminescence (TL), Photo stimulated emission (PSL) and TL emission, after X-ray irradiation have been observed. The optical absorption measurement indicates that F and Z3 centers are formed in the crystal during X-ray irradiation process. It was attempted to incorporate a broad band of Ce(3+) sensitizer into the narrow band emission of Tb(3+) in the KBr host without reduction of emission intensity. Co-doping of Ce(3+) ions in KBr:Tb(3+) crystal showed a broad band emission due to the d-f transition of Ce(3+) and a reduction in the intensity of emission peaks due to (5)days → (7)F6 transition of Tb(3+) when they were excited at 250 nm. These results supported that an effective energy transfer occurs from Ce(3+) to Tb(3+) in the KBr host. Co-doping Ce(3+) ions greatly intensified the excitation peak at 260 nm for the emission at 390 nm of Tb(3+) which means that more lattice defects, involved in the energy absorption and transfer to Tb(3+), are formed by the Ce(3+) co-doping. The integrated light intensity is two orders of magnitude higher as compared to the undoped samples for similar doses of irradiation and heating rate. Thermoluminescence process has been identified due to thermal mobilization of F-electrons and this causes peaks at 371 K and at 427 K, 457 K in KBr: Ce(3+), Tb(3+) crystals. The defects generated by irradiation were monitored by optical absorption and trap parameters for the TL process were calculated and presented.

show abstract

Section: Photoluminescencesupporting

confidence: 51%

Section: Introductionmentioning

confidence: 99%

Luminescence Properties and Optical Absorption of X ray-Irradiated KBr: Ce3+, Tb3+ Crystals

Bangaru¹,

Saradha²,

Muralidharan

2015

J Fluoresc

View full text Add to dashboard Cite

show abstract

“…A good number of supplementary or complementary experimental techniques are needed to understand the physical processes. Such results can come from the study of TL emission spectra, optical absorption, photostimulated (PSL), TL, PL, etc., of the samples (both impurity doped and undoped) at various stages of experimentation [8][9][10]. Optical absorption, PL and TL studies have been carried out on CsCl doped with terbium crystals [11].…”

Section: Introductionmentioning

confidence: 99%

Thermoluminescence and optical studies on X-irradiated terbium-doped potassium bromide crystals

Bangaru

Muralidharan

Brahmanandhan

2010

Journal of Luminescence

View full text Add to dashboard Cite

“…The energy transfer process from Ce 3+ to other activators has been studied by many authors [9][10][11][12]. The energy level of excited states of such ions is strongly affected by the kind of host matrix and the crystal-field strength of crystalline surrounding them.…”

Section: Introductionmentioning

confidence: 99%

Enhanced luminescent properties and optical absorption of γ-irradiated KI: Ce3+, Tb3+ crystals

Bangaru¹,

Muralidharan²

2009

Journal of Luminescence

View full text Add to dashboard Cite

Energy transfer process in CaSO4:Tb,Ce phosphor

Cited by 31 publications

References 16 publications

Luminescence Properties and Optical Absorption of X ray-Irradiated KBr: Ce3+, Tb3+ Crystals

Luminescence Properties and Optical Absorption of X ray-Irradiated KBr: Ce3+, Tb3+ Crystals

Thermoluminescence and optical studies on X-irradiated terbium-doped potassium bromide crystals

Enhanced luminescent properties and optical absorption of γ-irradiated KI: Ce3+, Tb3+ crystals

Contact Info

Product

Resources

About