Effect of annealing on optical properties of thin films with β-FeSi2 quantum dots

Autor:	Sergii Mamykin, N.L. Dmitruk, László Dózsa, O. Kondratenko, György Molnár
Rok vydání:	2009
Předmět:	Materials science Absorption spectroscopy Annealing (metallurgy) Nanoparticle Nanotechnology Condensed Matter Physics Epitaxy Molecular physics Surfaces Coatings and Films Quantum dot Particle size Nanodot Thin film Instrumentation
Zdroj:	Vacuum. 84:238-242
ISSN:	0042-207X
Popis:	Reactive deposition epitaxy was used to prepare β-FeSi2 nanodots on a Si(001) surface. The influence of annealing on optical properties has been studied. Annealing increases the particle size and decreases absorption. The indirect optical transition at 0.84–0.89 eV dominates the absorption spectra below 1.3–1.5 eV. The film with smaller nanoparticles exhibits higher absorption with direct optical transition energies in the 1.3–1.5 eV range. It suggests that direct transition is dominant only in small (around 3 nm diameter) β-FeSi2 nanodots. Larger particles are dominated by the indirect optical transition.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2cef8fef14de6888ef56ab2b1e84ed2d https://doi.org/10.1016/j.vacuum.2009.05.008 Zobrazit plný text záznamu Full Text from ScienceDirect