On the luminescence of Sb³⁺in Cs₂NaMCl₆(with M=Sc,Y,La): a model system for the study of trivalent s²ions

The luminescence of arsenic(III) in the cubic elpasolite Cs2NaScCl6

“…The excitation bands are assigned to the 'A,g-+3TlU (A band), 'A Ig+3Eu+3T2U (3 band) and 'A,,-+ IT,,, (C band) transitions, in order of increasing energy. As expected the B band gains intensity with increasing temperature [ 2,6]. …”

“…The value of C, as well as the values for the exchange energy G and the dipole strength ratio of the C band to the A band R,,,, can be calculated from the positions of the excitation bands [ 2,3,6]. This yields~=2500~100cm-',G=2700*100cm-'and Rth= 15?…”

“…For Sb3+ in CszNaLnC1, (Ln = SC, Y, La) it lies in the range 7500 to 10000 cm-', depending on the host lattice [ 1,2]. For Bi3+ in Cs2NaYC16 or Cs,NaLaCl, the Stokes shift is only some 1000 to 2000 cm-' [4,5].…”

Evaluation of Scintillation and Thermally Stimulated Luminescence Properties of Cs2CdCl4 Single Crystals

“…In the case of the Cs 2 CdCl 4 :Sb crystal, the excitation spectrum recorded for λ em = 516 nm consists of five bands: a triplet at 254, 277, and 296 nm, and a doublet at 336 and 350 nm. According to previous studies, (13,16,22) (26) and Sn 2+ (27)(28)(29) and has been explained in terms of thermal lattice vibrations. (29,30) The adiabatic potential energy surface (APES) of the excited state is split for general distorted lattice configurations, although it is degenerate in the equilibrium configuration of the ground state.…”

The luminescence of Cs2NaSbCl6 AND Cs2NaSbBr6: a transition from a localized to a delocalized excited state

“…The excitation spectrum of the emission band at Sb3+ ion increases when the space available in the 12800 cm-' consists of a broad band, starting at host lattice for the Sb3+ ion increases [ 2,3,17]. This is ascribed to the preference of the Sb3+ ion for asymmetric coordination [ 18,191.…”