ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Transparent oxyfluoride glass-ceramic thin films were prepared using a sol–gel method starting from rare-earth trifluoroacetate/silicon alkoxide solutions. SiO2–LaF3 and SiO2–LaOF glass-ceramics were formed by heating at temperatures of 300°–500°C and 600°–900°C, respectively. Eu3+ activators were successfully incorporated into oxyfluoride crystals, as evidenced by their luminescent properties, such as capability of a charge-transfer (O2––Eu3+) excitation, suppression of a multiphonon relaxation, and occurrence of a cross-relaxation at low Eu3+ concentrations. As a result, the films exhibited strong red emission by ultraviolet excitation. The incorporation supposedly originated from decomposition of the (La,Eu)-trifluoroacetates in the silica-gel matrix.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1151-2916.2001.tb01080.x
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