In:
Journal of the American Ceramic Society, Wiley, Vol. 101, No. 10 ( 2018-10), p. 4519-4525
Kurzfassung:
Uniform spheres of (Yb 0.98 RE 0.02 )PO 4 orthophosphate (RE=Ho, Er, and Tm, respectively) were synthesized via a homogeneous precipitation procedure mediated by SO 4 2− anions. The as‐precipitated and 1100°C calcined products were determined via laser‐diffraction particle sizing to have the average diameters of ~2.04 ± 0.67 and 1.80 ± 0.93 μm, respectively. The upconversion luminescence of RE 3+ under sensitization by the host Yb 3+ was studied for the calcination products under 978 nm laser excitation, and it was found that the emissions are dominated by a red band at ~650 nm for Ho 3+ ( 5 F 5 → 5 I 8 transition), similarly strong green (~515‐565 nm, 2 H 11/2 / 4 S 3/2 → 4 I 15/2 transition) and red (~640‐680 nm, 4 F 9/2 → 4 I 15/2 transition) bands for Er 3+ , and a near‐infrared band at ~800 nm for Tm 3+ ( 3 H 4 → 3 H 6 transition). The number of laser photons needed to populate the emitting state was determined by varying the excitation power, and the possible photon reactions leading to the observed upconversion were discussed.
Materialart:
Online-Ressource
ISSN:
0002-7820
,
1551-2916
DOI:
10.1111/jace.2018.101.issue-10
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2018
ZDB Id:
2008170-4
ZDB Id:
219232-9
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