Temperature-dependent optical absorption and its photoinduced changes in Bi12 TiO20?Ca? crystals

Dubrovin, A. N.; Mandel, A. E.; Шандаров, С. М.; Zhnykina, M. A.; Sukhoverkhov, Yu. M.; Kargin, Yu. F.; Волков, В. В.; Егорышева, А. В.; Shepelevich, V. V.

doi:10.1007/s10789-005-0078-0

Cited by 6 publications

(4 citation statements)

References 12 publications

(12 reference statements)

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“…4 shows X-ray diffraction patterns of the deposited films for the four deposition times considered in this work. As we can see, ZnS phase with the cubic structure and preferred orientation along (2 0 0) plane has been obtained after 90 min, as it has been reported in the literature [21,22]. Similar (2 0 0) plane dominance was also reported by Liang et al [23], for ZnS films prepared by cathodic electrodeposition technique.…”

Section: Thin Films Growthsupporting

confidence: 87%

Deposition time and annealing effects on morphological and optical properties of ZnS thin films prepared by chemical bath deposition

Chabou

Birouk

Aida

et al. 2019

Materials Science-Poland

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Nanocrystalline zinc sulfide thin films were prepared on glass substrates by chemical bath deposition method using aqueous solutions of zinc chloride, thiourea ammonium hydroxide along with non-toxic complexing agent trisodium citrate in alkaline medium at 80 • C. The effect of deposition time and annealing on the properties of ZnS thin films was investigated by X-ray diffraction, scanning electron microscopy, optical transmittance spectroscopy and four-point probe method. The X-ray diffraction analysis showed that the samples exhibited cubic sphalerite structure with preferential orientation along 2 0 0 direction. Scanning electron microscopy micrographs revealed uniform surface coverage, UV-Vis (300 nm to 800 nm) spectrophotometric measurements showed transparency of the films (transmittance ranging from 69 % to 81 %), with a direct allowed energy band gap in the range of 3.87 eV to 4.03 eV. After thermal annealing at 500 • C for 120 min, the transmittance increased up to 87 %. Moreover, the electrical conductivity of the deposited films increased with increasing of the deposition time from 0.35 × 10 −4 Ω·cm −1 to 2.7 × 10 −4 Ω·cm −1 .

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Section: Thin Films Growthsupporting

confidence: 87%

Deposition time and annealing effects on morphological and optical properties of ZnS thin films prepared by chemical bath deposition

Chabou

Birouk

Aida

et al. 2019

Materials Science-Poland

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“…In 2002 Shandarov et al [13] investigated experimentally the photo-induced absorption in Bi 12 TiO 20 :Ca and suggested a three-level model, which is a special case of the two-center model. The lifetime of the induced absorption was about several hours and depended on the temperature [14]. In [15].…”

Section: Introductionmentioning

confidence: 99%

Investigation of photo-induced absorption in a Bi12TiO20 crystal

et al. 2008

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A photorefractive Bi 12 TiO 20 (BTO) crystal is exposed with high intensity pulsed-laser beams 532 nm (the average intensity of the laser was 110 mW/cm 2 , the average intensity per pulse was 2 MW/cm 2 ), and the photo-induced dynamics of the absorption between 480 and 900 nm are studied and explained by two long-lived energy levels in the forbidden band. The relaxation times of the long-lived energy levels are experimentally found to be 10 4 and 10 5 s. The hysteresis character of the absorption coefficient is discussed.

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“…In 2002, Shandarov et al [13] investigated experimentally the photo-induced absorption in Bi 12 TiO 20 :Ca and suggested a three-level model, which is a special case of the two-center model. The lifetime of the induced absorption was about several hours and depended on the temperature [14] [15]. In 2007, we investigated the spectral characteristics of the photo-induced absorption in the pure Bi 12 TiO 20 using pulse lasers and calculated the energy of the absorption centers [16].…”

Section: Introductionmentioning

confidence: 99%

Methods for controlling of the laser-induced absorption in a BTO crystal by using of cw-laser radiation

et al. 2009

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A photorefractive BTO crystal is exposed with cw-laser beams (430 mW/cm 2 at 514 nm), and the photoinduced absorption between 480 and 900 nm is studied. A method of controlling this absorption by low intensity laser radiation of "green" and "red" wavelengths is demonstrated. The physical mechanism can be explained by the redistribution of electrons on the long-lived energy levels into the forbidden band. Dynamical characteristics of the redistribution are estimated.

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Temperature-dependent optical absorption and its photoinduced changes in Bi12 TiO20?Ca? crystals

Abstract: The photoinduced absorption in a Ca-doped bismuth titanate crystal is measured as a function of temperature in the red (660 nm), yellow (570 nm), and green (505 nm) spectral regions.

Cited by 6 publications

References 12 publications

Deposition time and annealing effects on morphological and optical properties of ZnS thin films prepared by chemical bath deposition

Deposition time and annealing effects on morphological and optical properties of ZnS thin films prepared by chemical bath deposition

Investigation of photo-induced absorption in a Bi12TiO20 crystal

Methods for controlling of the laser-induced absorption in a BTO crystal by using of cw-laser radiation

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