Optical investigation on Na3RE(PO4)2 (RE = La, Gd, Eu)

Magnetic characterization of microcrystalline Na3Ln0.99–xEr0.01Crx(PO4)2 orthophosphates synthesized by Pechini method (Ln = La, Gd)

“…From Fig. 3a one can see that the ratio of the EPR amplitudes for both sites is as high as 2, which indicates that twice as many chromium ions occupy center (1) than center (2).…”

“…7b) decreases exponentially with increasing temperature indicating shortening of the lattice relaxation time. EPR spectra of the Na 3 La(PO 4 ) 2 powder doped with 1 mol% of Er and 0.4 mol% of Cr contain additionally some bands assigned to chromium (2) center. The signal preserves its position in magnetic field with g ∼ 3.74.…”

“…Various lanthanide phosphates have been a subject of extensive structural and spectroscopic studies due to their important optical properties [1][2][3][4][5][6][7][8][9][10][11][12]. They exhibit a good chemical and thermal stability and optical efficiency.…”

“…The phosphates doped with various active ions could be easily obtained and commercially used. In a previous paper, we described Pechini method of synthesis as well as the thermal behavior and properties of sub-microcrystalline Yb 3+ -doped Na 3 RE(PO 4 ) 2 orthophosphates, where RE = La, Gd, Y [31].…”

Luminescent properties of Na3Gd1−xEux(PO4)2 and energy transfer in these phosphors

“…The structural and spectroscopic properties of the alkali metal lanthanide double phosphates, M 3 R(PO 4 ) 2 (R = trivalent lanthanide ions), doped with different lanthanide ions have been subject to considerable interest in the past [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. However, there are no detailed reports on the photo-luminescent properties of Na 3 Gd(PO 4 ) 2 :Eu 3+ under NUV excitation, i.e., little research on potential application in phosphor-converted WLEDs has been report.…”