Abstract

Temperature variation of indirect band gap of Tl2In2S3Se layered single crystals were obtained by means of absorption and photoconductivity measurements. The temperature coefficient of -7.1× 10-4 eV/K from absorption measurements in the temperature range of 10-300 K in the wavelength range of 520 -1100 nm and -5.0 × 10-4 eV/K from PC measurements in the temperature range of 132-291 K in the wavelength range of 443-620 nm upon supplying voltage V = 80 V were obtained. From the analysis of dark conductivity measurements in the temperature range of 150-300 K, conductivity activation energy was obtained as 0.51 eV above 242 K. The degree of the disorder, the density of localized states near Fermi level, the average hopping distance and average hopping energy of Tl2In2S3Se crystals were found as, 1.9×105 K and Nf = 4×1020 cm-3eV-1, 29.1 Å and 24.2 meV in the temperature range of 171-237 K, respectively. Activation energy of hopping conductivity at T = 171 K was obtained as 41.3 meV, the concentration of trapping states was found as 1.6 × 1019 cm-3.

Autore Pugliese

• Ambrico Marianna

Tutti gli autori

• I. Guler ; M. Ambrico ; T. Ligonzo ; N.M. Gasanly

Titolo volume/Rivista

Journal of alloys and compounds

Anno di pubblicazione

2012

ISSN

0925-8388

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

Non Disponibile

Ultimo Aggiornamento Citazioni

Non Disponibile

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile