Abstract
The photoluminescence properties in UV and N-UV excitable range for the phosphors of Na2La2B2O7: RE (RE=Eu, Tb, Ce, Sm, Gd) are investigated. The solution combustion synthesis technique was employed for the synthesis of the phosphors Na2La2B2O7: RE. The photoluminescence measurements of the phosphors were carried out on a HITACHI F7000 Fluorescence Spectrophotometer. The PL and PL excitation (PLE) spectra indicate that the main emission wavelength of Na2La2B2O7: Eu are 591 and 615nm, Na2La2B2O7: Ce shows dominating emission peak at 387nm and Na2La2B2O7: Tb displays green emission at 493, 544, 593 and 620nm at 254nm excitation, while Na2La2B2O7: Sm shows the main emission peak wavelengths 566 and 604nm at 405nm excitation and Na2La2B2O7: Gd shows dominating emission peak at 312nm at 274nm excitation. These phosphors may provide a new kind of luminescent materials under ultraviolet and near ultraviolet excitation for various applications.
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