Abstracts 2001

Abstract of Publication No. 384

Oliver S. Wenger and Hans U. Güdel
Dual Luminescence and Excited-State Dynamics in Ti2+ Doped NaCl
J. Phys. Chem. B 105, 4181-4187 (2001)      Full Text (PDF)      DOI-Link     

Abstract: Single crystals of Ti2+ doped NaCl were grown by the Bridgeman technique. High resolution variable temperature absorption, continuous-wave emission, and time-dependent measurements were performed for the spectroscopic characterization of the title compound. At T < 100 K excitation of Ti2+:NaCl in the red spectral region around 647 nm results in two broad emission bands centered at about 1850 and 780 nm, respectively, originating from the 3T2g(t2geg) first excited state and from the 3T1g(t2geg) higher excited state, respectively. Rate constants for the individual depopulation processes of the two metastable excited states are determined. The calculated 15 K 3T2g(t2geg) 3T1g(t2g2) and 3T1g(t2geg) 3T1g(t2g2) luminescence quantum yields are 1 and 0.26, respectively.

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