Laser‐Induced Formation of CdS Crystallites in Cd‐Doped Amorphous Arsenic Sulfide Thin Films. Issue 2 (16th September 2018)

• Record Type: Journal Article
• Authors: Azhniuk, Yuriy M.; Solonenko, Dmytro; Dzhagan, Volodymyr M.; Mukherjee, Ashutosh; Loya, Vasyl Y.; Grytsyshche, Iaroslav V.; Lopushansky, Vasyl V.; Gomonnai, Alexander V.; Zahn, Dietrich R. T.
• Other Names: Salvan Georgeta guestEditor.; Dzhagan Volodymyr guestEditor.; Vogt Patrick guestEditor.; Seyller Thomas guestEditor.
• Is Part Of: Physica status solidi. Volume 256:Issue 2(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-09-16
• Subjects: amorphous films -- photoplastic effect -- Raman scattering -- semiconductor crystallites -- X‐ray photoelectron spectroscopy; Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201800298
• Languages: English
• ISSNs: 0370-1972

Abstract

Abstract : As2 S3 :Cd films with nominal Cd content x up to 4 at.% were prepared by thermal evaporation. Their amorphous structure is confirmed by Raman spectroscopy. The film surface roughness estimated from atomic force microscopy does not exceed 1 nm. Energy‐dispersive X‐ray spectroscopy and X‐ray photoelectron spectroscopy show a strong decrease of Cd content with the film depth. Peaks of CdS longitudinal optical phonon and its overtones emerging in the Raman spectra of films with x ≥ 2 at.% Cd are the evidence for the laser irradiation‐induced formation of CdS crystallites in the As2 S3 :Cd films. The downward shift of the CdS Raman peak frequencies is mainly explained by tensile strain undergone by the CdS crystallites in the films caused by material transfer from the laser spot due to the photoplastic effect. Abstract : As follows from the Raman spectra, under above‐bandgap laser illumination of Cd‐doped amorphous As2 S3 films CdS nanocrystals are formed. The CdS nanocrystals undergo tensile strain of up to 1.5 GPa caused by the film material transfer from the laser spot due to the photoplastic effect. The Cd content in the film strongly decreases with the film depth.