Alkali Halides

Sirdeshmukh, D. B.; Sirdeshmukh, Lalitha; Subhadra, K. G.

doi:10.1007/978-3-662-04341-7

Cited by 126 publications

(51 citation statements)

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“…By using the values of µ derived from equations (8)- (11) and ΔG 0 in table 3, it is possible to obtain the bending angle φ 0 from equation (7), whereupon the magnitude of the Burgers vector of a dislocation with b=r[110] is 2r (i.e. b= 2r whereof r is the interionic distance at 0 K [25]). As shown in table 3, these calculations for all crystals are within 173° ≤ φ 0 < 180°, where the two curves (a solid and a dashed lines) in figure 2 overlap each other.…”

Section: Resultsmentioning

confidence: 99%

Interaction between a dislocation and monovalent anion in various alkali halide crystals

Kohzuki

2010

Cryst. Res. Technol.

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It was investigated from (L 0 /L)2 versus φ 0 curve that the Friedel relation between the effective stress and the average length of dislocation segments, L, is appropriate for the interaction between a dislocation and the monovalent anion in various alkali halides single crystals (NaCl: Br ). Here, L 0 represents the average spacing of monovalent anions on a slip plane and φ 0 is the bending angle at which the dislocation breaks away from the anion at the temperature of 0 K. This is because the anions are the weak obstacles such as impede the dislocation at φ 0 above about 150 degrees, where the Friedel relation agrees with the Fleischer one (L 0 2 = L 2 (π-φ 0 )/2). Furthermore, the values of (L/ L 0 ) were found to be within 4.05 to 5.87 for the crystals.

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Section: Resultsmentioning

confidence: 99%

Interaction between a dislocation and monovalent anion in various alkali halide crystals

Kohzuki

2010

Cryst. Res. Technol.

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“…The predicted GPT values for europium doped KF and KI appear in the Table 2. The radius data are taken from reference [8]. At the moment, there are no experimental results of thermoluminescence measured in β-irradiated KF:Eu 2+ and KI: Eu 2+ .…”

Section: Resultsmentioning

confidence: 99%

Mixture effects on the glow peak temperature of europium doped binary crystals

Rodríguez-Mijangos

Pérez‐Salas

2009

Phys. Status Solidi (c)

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Thermoluminescence measurements of beta‐irradiated divalent Europium doped binary divalent alkali halides with RbCl and KBr components at several compositions x have been obtained. A characteristic thermoluminescence glow peak for each concentration is identified and its temperature, varying from 373 to 458 K, is seen to be dependent on composition. The temperature shift is analyzed as an ion size effect. It is stronger when the halogen ions are interchanged, resembling that the recombination of a halogen vacancy with a hole is the principal source of the thermoluminescence glow peaks. The arguments above are used to predict in a gross manner the temperature of the principal thermoluminiscence glow peaks in different halogen families. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…The developed theory allowed us to study the exciton spectrum in QDs in the outer medium (a detailed description of the theory and method of CdTe/KBr composite crystals growth is given in Supporting Information). Numerical calculations were performed for the nanosystems CdTe/KBr and CdTe/water with the following parameters:

m_{CdTe}^{e} = 0.11 m_{e}

m_{KBr}^{e} = 0.5 m_{e}

m_{H_{2} normalO}^{e} = 1 m_{e}

U_{KBr}^{e} = 3380

meV,

U_{H_{2} normalO}^{e} = 7500

meV,

m_{CdTe}^{h} = 0.4 m_{e}

m_{KBr}^{h} = 0.7 m_{e}

U_{KBr}^{h} = 2580

meV,

U_{H_{2} normalO}^{h} = \infty

, E g0 = 1440 meV, ε CdTe = 7.4, ε KBr = 10.2,

ε_{H_{2} normalO} = 1.78

…”

Section: Methodsmentioning

confidence: 99%

Influence of the KBr matrix on the luminescence properties of CdTe quantum dots

2018

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The investigation of the luminescence properties of CdTe/KBr composites with encapsulated quantum dots (QDs) of different sizes was performed and the influence of the KBr matrix on the luminescence properties of CdTe QDs was studied. Encapsulation of nanoparticles by a solid matrix caused a bathochromic shift in the luminescence peak and the shift value was the larger the smaller the size of the quantum dots. Interband quantum transition theory was used to explain the influence of the matrix on the luminescence properties of the capsulated CdTe QDs. Theoretical calculations showed that the observed QD luminescence peak corresponded to a 1 s–1 s electronic transition, and its low‐energy shift after the transfer of QDs from dielectric water to the KBr matrix was due to a corresponding decrease in the depths of electrons and holes potential wells.

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Alkali Halides

Cited by 126 publications

References 0 publications

Interaction between a dislocation and monovalent anion in various alkali halide crystals

Interaction between a dislocation and monovalent anion in various alkali halide crystals

Mixture effects on the glow peak temperature of europium doped binary crystals

Influence of the KBr matrix on the luminescence properties of CdTe quantum dots

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