Skip to Main content Skip to Navigation
Theses

Effet de l'humidité du gaz vecteur et de l'assistance UV dans le procédé aérosol CVD pour l'élaboration de couches mines fluorescentes dopées terre rare

Abstract : The development of rare earth-doped thin film has gained interest over these last few years. In this report we present the elaboration of erbium-doped yttria (Y2O3), alumina (Al2O3) and yttria-alumina (Y2O3-Al2O3) films. The technique used is aerosol assisted chemical vapor deposition processes with metalorganic precursors (MOCVD). A UV-irradiation device is applied to assist the reaction process with a modification in the air humidity of the carrier gas. The best properties are obtained on thin films grown under high air humidity and with UV-assistance. Under such deposition conditions the yttria films present a low growth rate, low organic contamination and higher crystallisation degree in the yttria cubic structure. Several up-conversion phenomena are point out in the visible fluorescence spectra of the erbium ion in yttria. A lifetime of the 4I13/2 Er3+ level of 3.07 ms was found in this material after annealing at 800°C. This value is higher than that obtained for the sample deposited under low air humidity and without UV assistance after annealing at 1000°C. Alumina film deposited under optimal conditions show high growth rate and was a high thermal stability; allow the complete elimination of impurities while remaining amorphous. At last, the results of system Y2O3-Al2O3 indicates that deposition conditions play an important role on the composition and physicochemical properties of films.
Document type :
Theses
Complete list of metadatas

Cited literature [66 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00625424
Contributor : Abes Star :  Contact
Submitted on : Wednesday, September 21, 2011 - 3:57:28 PM
Last modification on : Thursday, November 19, 2020 - 12:59:39 PM
Long-term archiving on: : Thursday, December 22, 2011 - 2:26:46 AM

File

ThA_se_-_S._-_Rached_-_V2.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-00625424, version 1

Collections

STAR | CNRS | FMNT | LMGP | ME | INC-CNRS | UGA

Citation

Rached Salhi. Effet de l'humidité du gaz vecteur et de l'assistance UV dans le procédé aérosol CVD pour l'élaboration de couches mines fluorescentes dopées terre rare. Autre. Université de Grenoble, 2011. Français. ⟨NNT : 2011GRENI039⟩. ⟨tel-00625424⟩

Share

Metrics

Record views

767

Files downloads

531