In:
Luminescence, Wiley, Vol. 29, No. 4 ( 2014-06), p. 386-392
Abstract:
In this study, a series of LaNbTiO 6 :RE 3+ (RE = Tb, Dy, Ho) down‐converting phosphors were synthesized using a modified sol–gel combustion method, and their photoluminescence (PL) properties were investigated as a function of activator concentration and annealing temperature. The resultant particles were characterized using X‐ray diffraction, transmission electron microscopy, scanning electron microscopy, UV/Vis diffuse reflectance spectroscopy and PL spectra. The highly crystalline LaNbTiO 6 :RE 3+ (RE = Tb, Dy, Ho) phosphors with an average size of 200–300 nm obtained at 1100°C have an orthorhombic aeschynite‐type structure and exhibit the highest luminescent intensity in our study range. The emission spectra of LaNbTiO 6 :RE 3+ (RE = Tb, Dy, Ho) phosphors under excitations at UV/blue sources are mainly composed of characteristic peaks arising from the f–f transitions of RE 3+ , including 489 nm ( 5 D 4 → 7 F 6 ) and 545 nm ( 5 D 4 → 7 F 5 ) for Tb 3+ , 476 and 482 nm ( 4 F 9/2 → 6 H 15/2 ) and 571 nm ( 4 F 9/2 → 6 H 13/2 ) for Dy 3+ , and 545 nm ( 5 F 4 + 5 S 2 → 5 I 8 ) for Ho 3+ , respectively. The luminescent mechanisms were further investigated. It can be expected that these phosphors are of intense interest and potential importance for many optical applications. Copyright © 2013 John Wiley & Sons, Ltd.
Type of Medium:
Online Resource
ISSN:
1522-7235
,
1522-7243
Language:
English
Publisher:
Wiley
Publication Date:
2014
detail.hit.zdb_id:
2001819-8
SSG:
12
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