Preparation and luminescent properties of Eu-doped BaTiO3 thin films by sol–gel process

✍ Scribed by Juan Li; Makoto Kuwabara

• Publisher: Institute of Physics and National Institute of Materials Science
• Year: 2003
• Tongue: English
• Weight: 301 KB
• Volume: 4
• Category: Article
• ISSN: 1468-6996
• DOI: 10.1016/s1468-6996(03)00027-5

✦ Synopsis

Eu-doped BaTiO 3 thin films with a pseudo-cubic perovskite structure were successfully fabricated on magnesia substrates at low temperature by using a high-concentration sol-gel process, in which the newly developed gel-aging process on substrate was employed. Film microstructure, crystallinity, sintering properties and photoluminescence (PL) were investigated. The xerogel thin films exhibited strong PL associated with Eu 3þ ions under ultraviolet excitation at room temperature; the PL was visible to naked eyes. The intensity maximum of PL was reached with doping concentration of about 8 mol%. Sintering above 600 8C caused reduction of europium, resulting in a rapid quenching of Eu 3þ emission and enhancement of Eu 2þ emission.