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Femtosecond double-pulse laser ablation and deposition of Co-Doped ZnS thin films

AuthorsLopez-Quintas, Ignacio CSIC ORCID; Rebollar, Esther CSIC ORCID ; Ávila-Brande, David; Izquierdo, Jesús G.; Bañares, Luis; Díaz-Guerra, Carlos; Urbieta, Ana; Castillejo, Marta CSIC ORCID; de Nalda, R. CSIC ORCID; Martín Muñoz, Margarita CSIC
KeywordsUltrashort laser pulses
Double pulse irradiation
Pulsed laser deposition
Thin films
Diluted magnetic semiconductors
II-VI semiconductors
Transition metal doping
Zinc sulfide
Issue Date10-Nov-2020
PublisherMolecular Diversity Preservation International
CitationNanomaterials 10(11): 2229 (2020)
AbstractNanostructured thin films of Co-doped zinc sulfide were synthesized through femtosecond pulsed laser deposition. The scheme involved ablation of physically mixed Co and ZnS with pairs of ultrashort pulses separated in time in the 0–300 ps range. In situ monitorization of the deposition process was carried out through a simultaneous reflectivity measurement. The crystallinity of generated nanoparticles and the inclusion of Co in the ZnS lattice is demonstrated by transmission electron microscopy and energy dispersive X-ray microanalysis (TEM-EDX) characterization. Surface morphology, Raman response, and photoluminescence of the films have also been assessed. The role of interpulse temporal separation is most visible in the thickness of the films obtained at the same total fluence, with much thicker films deposited with short delays than with individual uncoupled pulses. The proportion of Co in the synthesized doped ZnS nanoparticles is found to be substantially lower than the original proportion, and practically independent on interpulse delay.
Description15 pags., 6 figs., 1 tab. -- This article belongs to the Special Issue Laser Synthesis and Modification of Materials at the Nanoscale
Publisher version (URL)https://doi.org/10.3390/nano10112229
Appears in Collections:(IQFR) Artículos
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