Photoluminescence and Judd-Ofelt analysis of Eu3 doped LaAlO3 nanophosphors for WLEDs

作者：Manohar T; Naik Ramachandra; Prashantha S C; Nagabhushana H; Sharma S C; Nagaswarupa H P; Anantharaju K S; Pratapkumar C; Premkumar H B

来源：Dyes and Pigments, 2015, 122: 22-30.

DOI：10.1016/j.dyepig.2015.06.002

• LaAlO3:Eu3
• Phosphor
• Photoluminescence
• CIE
• CCT
• Combustion process

Europium doped lanthanum aluminate nanophosphors were synthesized by a combustion process using Oxalyl di-hydrazide as fuel. The nanophosphors calcined at 900 degrees C for 3 h were characterized by PXRD, FTIR spectroscopy, SEM and TEM. The average crystallite size determined by TEM and Scherrer's method was found to be in the range 20-50 nm. The characteristic emission peaks (lambda(exi) - 395 nm) recorded at similar to 591, 616, 646 and 696 nm (D-5(0) -> F-7(j=0,1,2,3)) may be attributed to the 4f-4f intra shell transitions of Eu3 ions. The estimated CIE chromaticity co-ordinates were calculated from emission spectra, were close to the national television standard committee value of red emission. Correlated color temperature was found to be 1929 K.

• 出版日期2015-11