Mr. Chuanhui Liang Profile

Chuanhui Liang

at ENSICAEN

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Proceedings Article | 10 May 2012 Paper

Effect of rapid thermal annealing on Nd-SiOx thin film properties

C.-H. Liang, J. Cardin, L. Khomenkova, F. Gourbilleau

Proceedings Volume 8431, 84311Y (2012) https://doi.org/10.1117/12.922349

KEYWORDS: Silicon, Annealing, Ions, Silica, Thin films, Neodymium, Thermal effects, FT-IR spectroscopy, Luminescence, Chemical species

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The series of Nd³⁺-doped Si-rich SiO₂ thin films with different excess Si content were deposited by magnetron co-sputtering of three different (SiO₂, Si and Nd₂O₃) targets under a plasma of pure argon at 500 °C. The Si excess content in the samples was monitored via a power applied on Si cathode. The films were submitted to the rapid thermal annealing (RTA) at 900, 1000 and 1100 °C, respectively. It was observed a phase separation and a formation of Si nanoclusters embedded in oxide host. The Si excess, remaining after a RTA-1100 °C annealing, was found to be negligible, confirmed nearly complete phase separation. The Nd³⁺ photoluminescence (PL) property was explored as a function of Si excess and/or annealing temperature. The most efficient Nd³⁺ PL emission was found for the samples with about 4.7% of Si excess. These optimal samples, submitted to RTA-900 °C-1 min treatment and conventional annealing at 900°C for 1 h in nitrogen flow, demonstrated comparable Nd³⁺ PL intensities. This offers future application of RTA treatment to achieve an efficient emission from the materials doped with rare-earth ions.

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