Influence of OH- and Nd3+ concentrations on the lifetimes of the Nd3+: F-4(3/2) level in PbO-Bi2O3-Ga2O3 glasses
SCIE
SCOPUS
- Title
- Influence of OH- and Nd3+ concentrations on the lifetimes of the Nd3+: F-4(3/2) level in PbO-Bi2O3-Ga2O3 glasses
- Authors
- Choi, YG; Heo, J
- Date Issued
- 1998-12
- Publisher
- SOC GLASS TECHNOLOGY
- Abstract
- Effects of the spurious OH- on the emission characteristics of Nd3+ doped PbO=Bi2O3-Ga2O3 glasses were investigated. Analyses on the decaying behaviour of 1 . 35 mu m fluorescence from the F-4 (3/2) --> I-4 (13/2) transition in Nd3+ suggested the presence of two different energy transfer mechanisms between Nd3+ and OH-. For glasses with low concentration similar to 0 . 05 wt% Nd2O3, intensity of the emission showed a nonexponential decaying behaviour following the relationship of exp(t(0 . 5)) where t represents a time scale. In this case, a direct energy transfer from Nd3+ to OH- was responsible for the decay. The critical transfer distance (R-0) is approximately 0 . 46 nm. On the other hand, an exponential behaviour was dominant for glasses containing more than 0 . 5 wt% Nd2O3. Nonradiative decay in these glasses is mainly originated from the migration assisted cross relaxation of F-4 (3/2):I-4 (9/2) --> I-4 (15/2):I-4 (15/2) type among the neighbouring Nd3+ instead of a direct energy transfer from Nd3+ to OH-.
- Keywords
- 1.3 MU-M; MULTIPHONON RELAXATION; PHOSPHATE-GLASSES; OXIDE GLASSES; RARE-EARTH; WATER; IONS; IMPURITIES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/20559
- ISSN
- 0031-9090
- Article Type
- Article
- Citation
- PHYSICS AND CHEMISTRY OF GLASSES, vol. 39, no. 6, page. 311 - 317, 1998-12
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