Laser spectroscopy of nanocrystalline Eu2O3 and Eu3+:Y2O3

✍ Scribed by Hergen Eilers; Brian M. Tissue

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 473 KB
• Volume: 251
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(96)00061-9

✦ Synopsis

This letter presents optical spectra of EL?+ in nanocrystalline Eu,O, and Eu3+: Y203. The nanocrystalline particles condense in the monoclinic crystal structure after CO,-laser vaporization of metal oxide ceramics. The spectra of 14 nm Eu,O, particles have the same sharp lines as do micrometer-size particles, and the spectra of 5 nm Eu,O, particles show the sharp lines superimposed on broad and shifted bands. The spectra of 12 nm particles prepared from Eu,,,Y,.,O, starting material show two phases that are attributed to slightly disordered Eu,O, and crystalline Eu3+:Y,03. The spectra of 5 nm particles prepared from Eu,,, Y 0 show broad bands similar to the 5 nm Eu,O, spectra.