Cerium-doped SrHfO3 sol-gel films

Materia

Flores-González, M.A.¹  Villanueva-Ibáñez, M.¹  LE Luyer, C.² 

[1]Universidad Politécnica de Pachuca, México

[2]Université Claude Bernard Lyon I, Francia

关键词: SrHfO3;    sol-gel;    thin films;    planar waveguide;    scintillating film.;   

DOI  :  10.1590/S1517-70762010000400005

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

SrHfO3 presents high density, which makes it interesting for host lattice when it is doped with rare earths for luminescent materials. The optical and structural studies of Ce3+-doped strontium hafnate films prepared by the sol-gel process are presented in this work. Crack-free films with waveguiding performances were obtained with heat-treatments between 400°C and 700°C. The total elimination of organic compounds occurs above 800°C as indicated by Fourier transform infrared spectroscopy. The optogeometric properties (refractive index and thickness) are investigated by m-lines spectroscopy. Films structure is analysed using X-ray diffraction and transmission electron microscopy. The films crystallise from amorphous phase to pure SrHfO3 orthorhombic phase at 750°C. The HfO2 monoclinic phase superposes to SrHfO3 orthorhombic phase after heat treatment performed at 1000°C. Finally, the potentiality to prepare Ce3+ activated SrHfO3 sol-gel films with scintillation properties is explored.

【 授权许可】

CC BY