The luminescence of α- and β-LaNb3O9 |
| |
| Authors: | H.C.G. Verhaar H. Donker G.J. Dirksen M.J.J. Lammers G. Blasse C.C. Torardi L.H. Brixner |
| |
| Affiliation: | Physics Laboratory, State University, P.O. Box 80.000, 3508 TA Utrecht, The Netherlands;Central Research and Development Department, E. I. du Pont de Nemours and Company, Experimental Station, Wilmington, Delaware 19898 USA |
| |
| Abstract: | The luminescence of undoped and rare-earth-doped LaNb3O9 is reported. The two modifications (α and β) show striking differences. Whereas undoped β-LaNb3O9 does not luminesce at all (down to 4.2 K), α-LaNb3O9 emits efficiently with a quenching temperature of 250 K. Energy transfer from niobate to rare-earth dopants is observed for the α, but not for the β modification. The rare-earth dopant emission consists of sharp lines for the α modification, but is considerably broadened for the β modification. The luminescence properties are discussed in terms of the crystal structure. In addition results for α-NbPO5 will be given. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
