In:
Journal of the American Ceramic Society, Wiley, Vol. 102, No. 4 ( 2019-04), p. 1784-1793
Abstract:
La 4‐4x Eu 4x Ti 3 O 12 ( x = 0.01‐0.15) nanoparticles were synthesized via the polymerizable complex method. The X‐ray powder diffraction ( XRD ) measurements and Rietveld refinements verified that all the samples crystallized in a pure trigonal perovskite structure. La 4 Ti 3 O 12 has band energy of 3.88 eV , which can be greatly narrowed by Eu 3+ ‐doping. This benefits the red‐shift of the optical absorption from UV ‐ to near‐ UV wavelength region. La 4 Ti 3 O 12 has the self‐activated luminescence at room temperature with a broadband centered at 520 nm. La 4‐4x Eu 4x Ti 3 O 12 ( x = 0.01‐0.15) phosphors present red‐emitting luminescence with the strongest 5 D 0 → 7 F 2 transition at 613 nm. The energy transfer was discussed on the doping concentration. Importantly, the phosphors present dominant absorption in near‐ UV region (395 nm). An experimental red‐emitting lamp was fabricated using a 395 nm LED ‐chip in combination with the single phosphor of La 4‐4x Eu 4x Ti 3 O 12 ( x = 0.1). The results indicate that La 4‐4x Eu 4x Ti 3 O 12 could be a promising candidate used in solid‐state lighting and display under near UV ‐light.
Type of Medium:
Online Resource
ISSN:
0002-7820
,
1551-2916
DOI:
10.1111/jace.2019.102.issue-4
Language:
English
Publisher:
Wiley
Publication Date:
2019
detail.hit.zdb_id:
2008170-4
detail.hit.zdb_id:
219232-9
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