Back to Search
Start Over
Effect of phase transition on photoluminescence of Er-doped KNN ceramics.
- Source :
-
Journal of Luminescence . Nov2014, Vol. 155, p343-350. 8p. - Publication Year :
- 2014
-
Abstract
- The lead-free ceramics K0.5Na0.5NbO3 doped with x mol% Er3+ ions have been successfully manufactured and their photoluminescence properties, including the up-conversion visible (480-700 nm) emissions, down-conversion near infrared (1400-1680 nm) and middle infrared (2620-2850 nm) emissions, emission colors and lifetimes of the energy levels have been systemically investigated. The corresponding photoluminescence mechanism has been discussed in detail. Our results show that the Er-doping induces a phase transition from orthorhombic to cubic-like as well as inhibits the grain growth due to the donor-type nature. Both the change of crystallographic structures and concentration-quenching effect induced by Er3+ ions have great influences on the photoluminescence properties. Because of the wide emission ranges and long lifetimes, Er-doped K0.5Na0.5NbO3 ceramics are the promising candidates for optoelectronic applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00222313
- Volume :
- 155
- Database :
- Academic Search Index
- Journal :
- Journal of Luminescence
- Publication Type :
- Academic Journal
- Accession number :
- 97437814
- Full Text :
- https://doi.org/10.1016/j.jlumin.2014.07.005