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Luminescent properties of white-light-emitting phosphor LaMgAl11O19:Dy3+.
- Source :
-
Materials Letters . Jun2014, Vol. 125, p140-142. 3p. - Publication Year :
- 2014
-
Abstract
- Abstract: The LaMgAl11O19:Dy3+ phosphors were prepared by the high-temperature solid-state reaction method. The phase structure, luminescence properties, and the thermal stability of the phosphors were investigated. Under the excitation of 349nm, the LaMgAl11O19:Dy3+ phosphors exhibited three emission peaks at 475nm, 570nm, and 664nm, which respectively corresponded to the 4F9/2→6H15/2, 4F9/2→6H15/2, and 4F9/2→6H11/2 transitions. It was proved that dipole–dipole interaction resulted in the concentration quenching with a quenching concentration of 0.1mol. The emission intensity at 150°C was stronger than that at 25°C, indicating the good thermal stability of LaMgAl11O19:Dy3+ phosphors. The CIE coordinates of LaMgAl11O19:Dy3+ phosphors are very close to the white light coordinates (x=0.3333 and y=0.3333). Therefore, LaMgAl11O19:Dy3+ phosphor is a promising single-phase phosphor for white light emitting diodes. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 0167577X
- Volume :
- 125
- Database :
- Academic Search Index
- Journal :
- Materials Letters
- Publication Type :
- Academic Journal
- Accession number :
- 95825671
- Full Text :
- https://doi.org/10.1016/j.matlet.2014.03.171