In:
Journal of Materials Research, Springer Science and Business Media LLC, Vol. 25, No. 5 ( 2010-05), p. 850-856
Abstract:
Eu 3+ ion-doped BaY 2 ZnO 5 phosphors were synthesized using a vibrating milled solid-state reaction. The phosphors exhibit a series of Eu 3+ ion intra-4f excited state 5 D J ( J = 3, 2, 1, 0) transitions under an excitation of 395 nm. The maximum photoluminescence intensity for 5 D 0 → 7 F 2 transition (625 nm) was obtained at a Eu 3+ ion concentration of 40 mol%; quenching occurred at higher concentrations. The critical distance ( R c ) for the 5 D J ( J = 3, 2, 1) → 7 F 1 transition was 18.1 Å, which is longer than that of 6.67 Å for the 5 D 0 → 7 F 2 transition, indicating that 5 D J ( J = 3, 2, 1) is easier for concentration quench because of the cross-relaxation mechanism. The red emission of the BaY 1.6 Eu 0.4 ZnO 5 phosphor has CIE chromaticity coordinates of (0.66, 0.34), which are close to the NTSC system standard red chromaticity (0.67, 0.33). BaY 1.6 Eu 0.4 ZnO 5 may thus be potentially applicable as a red phosphor for ultraviolet light-emitting diodes converted in solid-state lighting technology.
Type of Medium:
Online Resource
ISSN:
0884-2914
,
2044-5326
DOI:
10.1557/JMR.2010.0128
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2010
detail.hit.zdb_id:
54876-5
detail.hit.zdb_id:
2015297-8
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