Specific Features of Content Dependences for Energy Gap in In_{x}Tl_{1-x}I Solid State Crystalline Alloys

• Authors: A. Kashuba , M. Piasecki , O. Bovgyra , V. Stadnyk , P. Demchenko , A. Fedorchuk , A. Franiv , B. Andriyevsky
• Languages of publication: EN

Abstracts

EN

A series of In_{x}Tl_{1-x}I (x=0.4-0.9) single crystalline solid state alloys were successfully synthesized by the vertical Bridgman method. For the first time the density functional theory based band structure calculations are performed and features of the band energy dispersion are discussed. Comparison with the experimental energy gap E_{g} obtained from the optical photoconductivity is discussed. An essential role of the localized defects and excitons in formation of the edge photoconductivity is analyzed. Relation between the crystal structure and photoconductivity of the materials studied is discussed. Also the origin of the principal valence and conduction bands is explored. Experimental measurements of the band gap E_{g} by the optical and photoconductivity methods have given opposite dependences with respect to the indium content x. Features of the photoconductivity spectra for different crystallographic directions have been discussed with taking into account the chemical bonds anisotropy.

Keywords

EN

71.20.Nr; 71.20.-b; 42.70.Gi; 71.35.-y

Discipline

• 71.20.-b: Electron density of states and band structure of crystalline solids
• 71.35.-y: Excitons and related phenomena
• 42.70.Gi: Light-sensitive materials
• 71.20.Nr: Semiconductor compounds

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2018
• Volume: 133
• Issue: 1
• Pages: 68-75

Dates

published

2018-01

received

2017-09-24

(unknown)

2017-11-15

Contributors

author

A. Kashuba

• Physics Faculty, Ivan Franko National University of Lviv, Kyrylo and Mephodiy str. 8a, Lviv, 79005, Ukraine

author

M. Piasecki

• Institute of Physics, Jan Długosz University Częstochowa, Armii Krajowej 13/15, Częstochowa, Poland

author

O. Bovgyra

• Physics Faculty, Ivan Franko National University of Lviv, Kyrylo and Mephodiy str. 8a, Lviv, 79005, Ukraine

author

V. Stadnyk

• Physics Faculty, Ivan Franko National University of Lviv, Kyrylo and Mephodiy str. 8a, Lviv, 79005, Ukraine

author

P. Demchenko

• Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla and Mephodiy Str. 6, Lviv, 79005, Ukraine

author

A. Fedorchuk

• Department of Inorganic and Organic Chemistry, Lviv National University of Veterinary Medicine and Biotechnologies, Pekarska Str. 50, 79010 Lviv, Ukraine

author

A. Franiv

• Physics Faculty, Ivan Franko National University of Lviv, Kyrylo and Mephodiy str. 8a, Lviv, 79005, Ukraine

author

B. Andriyevsky

• Faculty of Electronics and Computer Sciences, Koszalin University of Technology, Śniadeckich 2, PL-75453, Koszalin, Poland

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Identifiers

DOI

10.12693/APhysPolA.131.68