The quenching of the luminescence originating from the excited states P-3(0) and D-1(2), of Pr3+ and D-5(3) and D-5(4) of Tb3+ has been studied in oxide crystals containing closed shell transition metal ions, such as titanates, vanadates, niobates, and tantalates. It has been shown that the emission from these excited states can be quenched by an intervalence charge transfer mechanism. The temperature dependence of the emission intensities has allowed estimating indicative activation energies for the crossover to the intervalence charge transfer state. In the case of Tb3+, the quenching gives rise to relatively short decay times for the D-5(4) state.

Quenching of lanthanide emission by intervalence charge transfer in crystals containing closed shell transition metal ions

SPEGHINI, Adolfo;BETTINELLI, Marco Giovanni
2007-01-01

Abstract

The quenching of the luminescence originating from the excited states P-3(0) and D-1(2), of Pr3+ and D-5(3) and D-5(4) of Tb3+ has been studied in oxide crystals containing closed shell transition metal ions, such as titanates, vanadates, niobates, and tantalates. It has been shown that the emission from these excited states can be quenched by an intervalence charge transfer mechanism. The temperature dependence of the emission intensities has allowed estimating indicative activation energies for the crossover to the intervalence charge transfer state. In the case of Tb3+, the quenching gives rise to relatively short decay times for the D-5(4) state.
crystals; intervalence charge transfer; lanthanides
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11562/302421
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 55
  • ???jsp.display-item.citation.isi??? 53
social impact