Influence of preparation conditions on the microstructure and optical properties of LiNbO.sub.3./sub. thin films

0451696 - FZÚ 2016 RIV CZ eng J - Journal Article
Mikolášková, D. - Rubešová, K. - Hlásek, T. - Jakeš, V. - Oswald, Jiří - Remsa, Jan
Influence of preparation conditions on the microstructure and optical properties of LiNbO₃ thin films.
Ceramics - Silikáty. Roč. 59, č. 2 (2015), s. 164-168. ISSN 0862-5468. E-ISSN 1804-5847
Institutional support: RVO:68378271
Keywords : lithium niobate * thin film * sol-gel * rapid annealing
Subject RIV: CA - Inorganic Chemistry
Impact factor: 0.485, year: 2015

Thin films of Er3+/Yb3+: LiNbO3 were deposited on sapphire (0001) substrates using a spin-coating process. A deposited solution was prepared by a non-aqueous sol-gel method using 2-methoxyethanol, metallic lithium, niobium(V) ethoxide and erbium and ytterbium acetates. Two starting compositions of LiNbO3 solution (1:1 or congruent) were tested in order to minimize the present of secondary (Er/Yb)NbO4 phases. The effect of different temperature (800°C or 1000°C) and different used atmosphere (air or oxygen) during the films crystallization was also investigated. Rapid annealing (at 1150°C with the heating rate 55°C·s-1) was also tested and its influence on secondary phases crystallinity and luminescence of Er3+/Yb3+: LiNbO3 was established. The thin films were characterized by X-ray diffraction analysis, scanning electron microscopy and photoluminescence spectroscopy.
Permanent Link: http://hdl.handle.net/11104/0252813