Tuning Optical Absorption Edge by Composition and Temperature in TlGaS_{2x}Se_{2(1-x)} Layered Mixed Crystals (0 ≤ x ≤ 1)

• Authors: N. Gasanly
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

78.20.Ci; 78.40.-q; 78.40.Fy

Discipline

• 78.20.Ci: Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)
• 78.40.-q: Absorption and reflection spectra: visible and ultraviolet(for infrared spectra, see 78.30.-j; for optical spectra of superconductors, see 74.25.nd; for time resolved reflection spectroscopy, see 78.47.jg; for multiphoton absorption, see 79.20.Ws in impact phenomena)
• 78.40.Fy: Semiconductors

• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 4
• Pages: 728-731

Dates

published

2012-10

received

2011-11-10

(unknown)

2012-07-31

Contributors

author

N. Gasanly

• Physics Department, Middle East Technical University, 06800 Ankara, Turkey

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Identifiers

DOI

10.12693/APhysPolA.122.728