Photoelectrical properties and the electronic structure of Tl sub(1-x)In sub(1-x)Sn sub(x)Se sub(2) (x= 0, 0.1, 0.2, 0.25) single crystalline alloys

Photoelectrical properties of Tl sub(1-x)In sub(1-x)Sn sub(x)Se sub(2) single crystalline alloys (x= 0, 0.1, 0.2, 0.25) grown using the Bridgman-Stockbarger method were studied. The temperature dependence of electrical and photoconductivity for the Tl sub(1-x)In sub(1-x)Sn sub(x) Se sub(2) single cr...

Full description

Saved in:
Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2013-04, Vol.15 (18), p.6965-6972
Main Authors: Davydyuk, GE, Khyzhun, O Y, Reshak, AH, Kamarudin, H, Myronchuk, G L, Danylchuk, S P, Fedorchuk, A O, Piskach, LV, Mozolyuk, MYu, Parasyuk, O V
Format: Article
Language:English
Subjects:
Alloys
Crystal structure
Energy distribution
Photoconductivity
Photoelectrons
Single crystals
Spectra
X-rays
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Photoelectrical properties of Tl sub(1-x)In sub(1-x)Sn sub(x)Se sub(2) single crystalline alloys (x= 0, 0.1, 0.2, 0.25) grown using the Bridgman-Stockbarger method were studied. The temperature dependence of electrical and photoconductivity for the Tl sub(1-x)In sub(1-x)Sn sub(x) Se sub(2) single crystals was explored. It has been established that photosensitivity of the Tl sub(1-x)In sub(1-x)Sn sub(x)Se sub(2) single crystals increases with x. The spectral distribution of photocurrent in the wavelength spectral range 400-1000 nm has been investigated at various temperatures. Photoconductivity increases in all the studied crystals with temperature. Therefore, thermal activation of photoconductivity is caused by re-charging of the photoactive centers as the samples are heated. Based on our investigations, a model of center re-charging is proposed that explains the observed phenomena. X-ray photoelectron valence-band spectra for pristine and Ar super(+)-ion irradiated surfaces of the Tl sub(1-x)In sub(1-x)Sn sub(x) Se sub(2) single crystals have been measured. These results reveal that the Tl sub(1-x)In sub(1-x)Sn sub(x)Se sub(2) single-crystal surface is sensitive to the Ar super(+) ion irradiation that induced structural modification in the top surface layers. Comparison on a common energy scale of the X-ray emission Se K beta sub(2) bands representing energy distribution of the Se 4p-like states and the X-ray photoelectron valence-band spectra was done.
ISSN:1463-9076
1463-9084
DOI:10.1039/c3cp50836f