Incorporation of Li in MoO 3 thin films grown by evaporation with a CO 2 laser

Autor: A. Pardo, L. C. Moreno, D. Diaz, J. Torres, J. E. Alfonso
Rok vydání: 2007
Předmět:
Zdroj: physica status solidi c. 4:4165-4169
ISSN: 1610-1642
1862-6351
DOI: 10.1002/pssc.200675920
Popis: This work describes the lithium incorporation process in thin films of MoO3 prepared by evaporation with a laser of CO2, working in continuous wave mode. Targets prepared from mixtures of MoO3 (99.97%) and Li2CO3 (99.98%) in powder were used in the growth of the films. The targets had Li concentrations of 1%, 2% and 5% (lithium ions/total cations). The samples were characterized through X-rays diffraction, (XRD) and transmittance in the visible spectrum. The XRD spectra show an evolution in the growth of the films, beginning by an amorphous phase for samples with temperatures lower than 200 °C. From this temperature on a mixture of the α and β phases of LiMoO3 and Li2MoO4 appears, which grow along planes (100), (111) for LiMoO3 and (012) for Li2MoO4. The transmittance spectra showed a shift of the material's energy gap towards long wavelengths as the lithium concentration increases in the sample. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Databáze: OpenAIRE
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