Optical and structural characterization of KBr crystals doped cadmium bromide (CdBr2)

Bensouici, A.; Plaza, J.L.; Diéguez, E.; Halimi, O.; Guerbous, L.; Sebais, M.

doi:10.1016/j.jlumin.2009.11.020

Cited by 6 publications

(5 citation statements)

References 12 publications

(14 reference statements)

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“…The UV/Vis absorbance spectrum of a pure KBr pellet (Fig. 5) clearly indicate the transparency of KBr in the region 200 to 600 nm, so it presents a good host to study the optical properties of semiconductors in this region and it was successfully used for the elaboration of CdTe and CdBr2 nanocrystals [25,26]. Absorbance (a.u.…”

Section: Resultsmentioning

confidence: 99%

Optical, Structural and Spectroscopic Characterization of ZnS Nanocrystals Embedded in KBr Single Crystal Matrix Grown by Czochralski Method

Zeroual¹,

Mahboub²,

Rihia³

et al. 2021

DDF

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ZnS nanocrystals were embedded in a KBr single crystal matrix using the Czochralski growth technique. The X-ray diffraction, FT-IR and optical spectroscopy revealed the incorporation of ZnS nanocrystals. A blue shift of the absorption edge of the obtained samples has been observed, indicating the quantum confinement effect. The optical band-gap is estimated to be about 4.67 eV. Two excitonic peaks appeared at 300.4 nm and 271 nm. The average nanocrystal size was derived from the optical spectra. Annealing led to a shift in the absorption edge towards longer wavelengths and an increasing of the emissions intensity. Raman lines of the nanoparticles are broader and frequency-shifted compared to those of the bulk crystals. These results show that KBr is a good matrix-host of ZnS nanocrystals, and that the elaborated samples can be used for important technological applications.

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Section: Resultsmentioning

confidence: 99%

Optical, Structural and Spectroscopic Characterization of ZnS Nanocrystals Embedded in KBr Single Crystal Matrix Grown by Czochralski Method

Zeroual¹,

Mahboub²,

Rihia³

et al. 2021

DDF

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“…CdTe/CdBr 2 powder added to KBr (0.5% mol) has been obtained by mechanical grinding. The Cz technique in this work is carried out by a standard Czochralski chamber, more experimental details was mentioned previously [5,6]. Room temperature emission spectra were recorded by using a Jasco LP-6500 luminescence spectrometer.…”

Section: Methodsmentioning

confidence: 99%

“…In addition, chemical decomposition may be one of encountered obstacles during crystal growth at high temperature. In our previous works [5,6] where we have elaborate KBr:CdTe and KBr:CdBr 2 using Czochralski technique we have encountered chemical decomposition of dopants: CdTe and CdBr 2 . XRD and optical absorption results ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Chemical decomposition of CdTe and CdBr<inf>2</inf> dopants in KBr

Bensouici

Ayadi

Iosin

et al. 2013

2013 15th International Conference on Transparent Optical Networks (ICTON)

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“…In the search of new photochromic materials, several crystalline substances [5] were considered, including CdCl 2 and CdBr 2 crystals [6]. Herein, we discuss the influence of photochromic effect on radiative processes in CdBr 2 : AgCl,PbBr 2 crystals.…”

Section: Introductionmentioning

confidence: 99%

Time dependence of the luminescence intensity in CdBr2: AgCl,PbBr2 crystals under N2-laser excitation at room temperature

Bolesta

Kalivoshka

Karbovnyk

et al. 2014

Materials Science-Poland

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Results of optical-luminescence studies of polydoped photochromic CdBr2: AgCl,PbBr2 crystals are presented. It is shown that the luminescence decrease vs. time under N2-laser excitation in the range of A-band of Pb2+ absorption is due to photochemical reactions. The empirical model describing the decrease of the luminescence related to silver impurities due to photochemical processes is suggested. Model parameters (trapping cross-section — σ — and the amount of centres destroyed by irradiation — β) were determined using the comparative analysis of experimental and calculated luminescence decay curves.

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Optical and structural characterization of KBr crystals doped cadmium bromide (CdBr2)

Cited by 6 publications

References 12 publications

Optical, Structural and Spectroscopic Characterization of ZnS Nanocrystals Embedded in KBr Single Crystal Matrix Grown by Czochralski Method

Optical, Structural and Spectroscopic Characterization of ZnS Nanocrystals Embedded in KBr Single Crystal Matrix Grown by Czochralski Method

Chemical decomposition of CdTe and CdBr<inf>2</inf> dopants in KBr

Time dependence of the luminescence intensity in CdBr2: AgCl,PbBr2 crystals under N2-laser excitation at room temperature

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