Autor: Gasanly, N. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Tuning Optical Absorption Edge by Composition and Temperature in $TlGaS_{2x}Se_{2(1-x)}$ Layered Mixed Crystals (0 ≤ x ≤ 1)
Autorzy:: Gasanly, N.
Powiązania:: https://bibliotekanauki.pl/articles/1418284.pdf
Data publikacji:: 2012-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.20.Ci
78.40.-q
78.40.Fy
Opis:: Optical properties of $TlGaS_{2x}Se_{2(1-x)}$ mixed crystals (0 ≤ x ≤1) have been studied using the transmission and reflection measurements in the wavelength range of 400-1100 nm. The optical indirect band gap energies were determined through the analysis of the absorption data. It was found that the energy band gaps increase with increase of sulfur atoms content in $TlGaS_{2x}Se_{2(1-x)}$ mixed crystals. From the transmission measurements carried out in the temperature range of 10-300 K, the rates of change of the indirect band gaps with temperature were established for the different compositions of mixed crystals studied.
Źródło:: Acta Physica Polonica A; 2012, 122, 4; 728-731
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Low-Temperature Thermoluminescence Studies on $TlInS_{2}$ Layered Single Crystals
Autorzy:: Isik, M.
Delice, S.
Gasanly, N.
Powiązania:: https://bibliotekanauki.pl/articles/1377812.pdf
Data publikacji:: 2014-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.40.Fy
71.55.-i
78.60.Kn
Opis:: Thermoluminescence characteristics of $TlInS_{2}$ layered single crystals grown by the Bridgman method were investigated in the low temperature range of 10-300 K. The illuminated sample with blue light ( ≈ 470 nm) at 10 K was heated at constant heating rate. Curve fitting, initial rise and various heating rate methods were used to determine the activation energy of the trap levels. All applied methods showed good consistency about the presence of five trapping centers located at 14, 19, 350, 420, and 520 meV. Behavior of the TL curve for various heating rates was investigated. Traps distribution has also been studied. The activation energies of the distributed trapping centers were found to be increasing from 14 to 46 meV.
Źródło:: Acta Physica Polonica A; 2014, 126, 6; 1299-1303
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Optical Absorption and Reflection Studies of Tl$\text{}_{4}$InGa$\text{}_{3}$S$\text{}_{8}$ Layered Single Crystals
Autorzy:: Goksen, K.
Gasanly, N. M.
Ozkan, H.
Powiązania:: https://bibliotekanauki.pl/articles/2047363.pdf
Data publikacji:: 2007-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.20.Ci
78.40.-q
78.40.Fy
Opis:: The optical properties of Tl$\text{}_{4}$InGa$\text{}_{3}$S$\text{}_{8}$ layered single crystals have been studied by means of transmission and reflection measurements in the wavelength region between 400 and 1100 nm. The analysis of the room temperature absorption data revealed the presence of both optical indirect and direct transitions with band gap energies of 2.40 and 2.61 eV, respectively. Transmission measurements carried out in the temperature range of 10-300 K revealed the rate of change of the indirect band gap with temperature asγ=-6.0×10$\text{}^{-4}$ eV/K. The absolute zero value of the band gap energy was obtained as E$\text{}_{gi}$(0)= 2.52 eV. The dispersion of the refractive index is discussed in terms of the Wemple-DiDomenico single-effective-oscillator model. The refractive index dispersion parameters: oscillator energy, dispersion energy, oscillator strength, and zero-frequency refractive index were found to be 5.07 eV, 26.67 eV, 8.82×10$\text{}^{13}$ m$\text{}^{-2}$, and 2.50, respectively.
Źródło:: Acta Physica Polonica A; 2007, 112, 1; 93-100
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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