Effect of initial trap occupancy on thermoluminescence characteristics of insulating crystals

Opanowicz, A.

doi:10.1002/pssa.2211300125

Cited by 11 publications

(21 citation statements)

References 22 publications

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“…It is seen from figures 1a and 1b that the TSL and both TSC peaks calculated for ω=10 -2 K s -1 have the shape similar to that typical for the corresponding TSL and TSC curves calculated for the set A using the QE approximation in the case of the weak retrapping (see e.g. [2,11,12], and table 2).The following figures show that it is the case of decreasing the recombination probability (γ(T), Fig.1c) and increasing the recombination lifetime (τ e (T), Fig.1d) with increasing of the temperature. Analysis of the temperature dependence of the QE level parameter q I for ω=10 -2 Ks -1 ( (Fig.…”

Section: Calculation Results Of the Tsl And Tsc Characteristicssupporting

confidence: 54%

“…For the description of the TSL and TSC we can use the recombination probability parameter [11,12] is the free electron trapping time we can present the parameter in the form: (15) where P e =τ e -1 and P t =τ t -1 are the probabilities (per second) of the recombination and, respectively, trapping. The parameter γ can have values from 0 to1.…”

Section: Theoretical Description Of the Tsc And Tsl Without Quasi-equmentioning

confidence: 99%

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Analysis of thermally stimulated luminescence and conductivity without quasi-equilibrium approximation

Opanowicz¹

2007

J. Phys. D: Appl. Phys.

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Thermally stimulated luminescence (TSL) and conductivity (TSC) are considered using the classical insulator model that assumes one kind of the active trap, one kind of inactive deep trap, and one kind of the recombination center. Kinetic equations describing the model are solved numerically without and with the use of the quasiequilibrium (QE) approximation. The QE state parameter q I ,, the relative recombination probability γ, and a new parameter called quasi-stationary (QS) state parameter q*=q I γ are used for the analysis of the TSL and TSC. The TSL and TSC curves and the temperature dependences of q I , q*, γ, the recombination lifetime, and the occupancies of active traps and recombination centers are numerically calculated for five sets of kinetic parameters and different heating rates. These calculation results show that: (1) the upper limit of the heating rate for presence of the QS state appears at higher heating rate than that for the QE state when the retrapping process is present, and (2) the TSL (TSC) curves in the QS state have the properties similar to those for the TSL (TSC) curves in the QE state. Approximate formulas for calculation of the parameters q I and q* in the initial range of the TSL and TSC curves are derived and used in the heating-rate methods, proposed in this work, for determination of those parameters from the calculated TSL curves.

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Section: Calculation Results Of the Tsl And Tsc Characteristicssupporting

confidence: 54%

Section: Theoretical Description Of the Tsc And Tsl Without Quasi-equmentioning

confidence: 99%

Analysis of thermally stimulated luminescence and conductivity without quasi-equilibrium approximation

Opanowicz¹

2007

J. Phys. D: Appl. Phys.

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“…(3)- (5) for the previously studied cases [8,14,15] in which the QE assumptions were used. We have also solved Eqs.…”

Section: Results Of Calculations and Discussionmentioning

confidence: 99%

“…We have also solved Eqs. (3)- (5) without and with assumptions (1) and (2) for sets of trapping and recombination parameters other than used in [8,14,15]. The exact solutions of Eqs.…”

Section: Results Of Calculations and Discussionmentioning

confidence: 99%

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Characteristics of Thermally Stimulated Luminescence and Conductivity of Insulating Crystal

Opanowicz

1996

Acta Phys. Pol. A

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Different characteristics of thermally stimulated luminescence and conductivity in insulator are numerically calculated without the quasi-equilibrium approximation. The results are compared with corresponding results calculated using the quasi-equiłibrium approximation. This comparison suggests that the quasi-equifibrium approximation is correct in the low temperature range of the thermally stimulated luminescence and conductivity curves for crystals which have the density of recombination centres higher than 10 13 cm 3 and the recombination coefficient larger than 10 -12 cm3 s-1 , or equivalently, for those with the initial free electron lifetime shorter than 10 -1 s. For the high temperature range of the thermally stimulated luminescence and conductivity curves the quasi-equilibrium approximation gives correct results if the recombination centres density is higher than 10 14 cm 3 and the recombination coefficient is larger than 10-12 cm3 s-1 or if the initial free electron lifetime is shorter than 10 -2 s. The results of this paper show also that the so-called "first-order" shape of the thermally stimulated luminescence and conductivity curves is likical not of the weak retrapping only, but it can be obtained ałso for the strong retrapping.

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Effect of initial trap occupancy on thermoluminescence characteristics of insulating crystals

Cited by 11 publications

References 22 publications

Analysis of thermally stimulated luminescence and conductivity without quasi-equilibrium approximation

Analysis of thermally stimulated luminescence and conductivity without quasi-equilibrium approximation

Characteristics of Thermally Stimulated Luminescence and Conductivity of Insulating Crystal

Exact solutions of the basic differential equations describing thermally stimulated luminescence and conductivity

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