Spectroscopic ellipsometry characterization of spin-coated Ge25S75 chalcogenide thin films

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F17%3A39902703" target="_blank" >RIV/00216275:25310/17:39902703 - isvavai.cz</a>

Result on the web

<a href="https://www.degruyter.com/view/j/pac.2017.89.issue-4/pac-2016-1019/pac-2016-1019.xml" target="_blank" >https://www.degruyter.com/view/j/pac.2017.89.issue-4/pac-2016-1019/pac-2016-1019.xml</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1515/pac-2016-1019" target="_blank" >10.1515/pac-2016-1019</a>

Result language

angličtina

Original language name

Spectroscopic ellipsometry characterization of spin-coated Ge25S75 chalcogenide thin films

Original language description

Spectroscopic ellipsometry study on spin-coated non-toxic Ge25S75 thin films annealed at different temperatures were conducted. Multi sample analysis with two sets of samples spin-coated onto soda-lime glass and onto silicon wafers was utilized. Optical constants (refractive index n and extinction coefficient k) of these films were determined from ellipsometric data recorded over a wide spectral range (0.05–6 eV). Different parametrization of Ge25S75 complex dielectric permittivity which consists of a Tauc-Lorentz or Cody-Lorentz oscillator describing the short wavelength absorption edge, a Lorentz or Gauss oscillators describing phonon absorption or optically active absorption of alkyl ammonium germanium salts in the middle infrared part of spectra is discussed. Using a Mott-Davis model, the decrease in local disorder with increasing annealing temperature is quantified from the short wavelength absorption edge onset. Using the Wemple-DiDomenico single oscillator model for the transparent part of the optical constants spectra, a decrease in the centroid distance of the valence and conduction bands with increasing annealing temperature is shown and increase in intensity of the inter-band optical transition due to annealing temperature occurs. Intensity of absorption near 3000 cm−1 could be used as alternative method to evaluation of quality of prepared films.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Pure and Applied Chemistry

ISSN

0033-4545

e-ISSN

—

Volume of the periodical

89

Issue of the periodical within the volume

4

Country of publishing house

DE - GERMANY

Number of pages

13

Pages from-to

437-449

UT code for WoS article

000403319800005

EID of the result in the Scopus database

2-s2.0-85019383006