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Ternary CdS 1– x Se x nanocrystals formed in Cd‐doped As–Se–S films due to photoenhanced diffusion during micro‐Raman measurement
Author(s) -
Azhniuk Yuriy M.,
Dzhagan Volodymyr M.,
Solonenko Dmytro,
Lopushansky Vasyl V.,
Loya Vasyl Y.,
Kryshenik Volodymyr M.,
Voynarovych Ivan M.,
Gomonnai Alexander V.,
Zahn Dietrich R.T.
Publication year - 2021
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.6063
Subject(s) - raman spectroscopy , photoluminescence , amorphous solid , ternary operation , analytical chemistry (journal) , materials science , exciton , nanocrystal , crystallography , chemistry , nanotechnology , optics , condensed matter physics , optoelectronics , programming language , physics , computer science , chromatography
Micro‐Raman spectra of amorphous As–Se–S:Cd films prepared by thermal evaporation on silicon and silicate glass substrates measured at different laser power densities show the formation of CdS 1– x Se x nanocrystals in the As–Se–S:Cd film under laser beam illumination due to a photoinduced material transfer and photoenhanced diffusion in the laser spot area. The material transfer and the photoenhanced diffusion are caused by a non‐thermal interaction of light with the amorphous As–Se–S:Cd films. The chemical composition of the CdS 1– x Se x nanocrystals can be determined from the difference of the CdSe‐like and CdS‐like LO phonon wavenumbers in the Raman spectra. The photoluminescence peak energies are in agreement with the CdS 1– x Se x composition, with the average nanocrystal size being somewhat above the exciton Bohr radius.