De-excitation processes of optically excited Nd3+ pairs in CsCdBr3

Abstract

Résumé. -

High-resolution infrared absorption spectra, crystal-field levels, and relaxation processes inCsCdBr3:Pr3+

“…CsCdBr 3 crystals containing 0.2 % of Pr 3+ were grown by the method described in Ref. [12]. Crystals easily cleave along the c -axis.…”

Temperature Dependence of Rate Constants for Tb3+(5D3) Cross Relaxation in Symmetric Tb3+ Pairs in Tb-Doped CsCdBr3, CsMgBr3, CsMgCl3

“…CsCdBr 3 is by far the most studied of the three lattices, owing largely to the fact that it is the most-easily synthesized and the least hygroscopic. Optical studies and/or 4f energy-level analyses of Ln 3+ ions in CsCdBr 3 include singly doped Ce 3+ , 2 Pr 3+ , [3][4][5][6][7][8][9][10][11][12] Nd 3+ , [13][14][15][16][17][18][19] Eu 3+ , 20 Tb 3+ , [21][22][23] Dy 3+ , 13,24,25 Ho 3+ , 13,[26][27][28][29][30] Er 3+ , 13,14,[31][32][33][34][35][36][37] Tm 3+ , 6,13,38,39 and Yb 3+ 40-45 systems and codoped Tb 3+ -Gd 3+ , 21 Tm 3+ -Pr 3+ , 6,46 Tm 3+ -Ho 3+ , 39 Yb 3+ -Er 3+ , 47 Pr 3+ -Gd 3+ , 13 and Ce 3+ -Tm 3+ 48 syst...…”

Tb3+ Luminescence in Tb-Doped and Tb/Gd-Doped CsCdBr3 Crystals: 5D4→5D3 Cross-Relaxation Rates in Tb3+ Pairs

“…The Ln 3+ environment is similar to that of the unsubstituted M 2+ ions, except that the Ln 3+ ions collapse slightly toward the vacancy, lowering the site symmetry to C 3 v . The Ln 3+ ions investigated optically in one or more of the CsMX 3 hosts include singly doped Pr 3+ , − Nd 3+ , − Tb 3+ , , Ho 3+ , , Eu 3+ , , Er 3+ , − Tm 3+ , and Ce 3+ 26 systems, and codoped Tm 3+ −Pr 3+ , Tm 3+ −Ho 3+ , Yb 3+ −Er 3+ , Gd 3+ −Er 3+ 30 and Ce 3+ −Tm 3+ 31 systems. By far, the majority of these spectroscopic investigations of lanthanide pairs in these hosts have centered on upconversion processes, especially in Er 3+ :CsCdBr 3 , wherein pair luminescence can be obtained at wavelengths shorter than the excitation wavelength(s).…”