화학공학소재연구정보센터
Journal of Physical Chemistry B, Vol.105, No.19, 4181-4187, 2001
Dual luminescence and excited-state dynamics in Ti2+ doped NaCl
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 T-3(2g)(t(2g)e(g)) first excited state and from the T-3(1g)(t(2g)e(g)) higher excited state, respectively. Rate constants for the individual depopulation processes of the two metastable excited states are determined. The calculated 15 K T-3(2g)(t(2g)e(g)) --> T-3(1g)(t(2g)(2)) and T-3(1g)(t(2g)e(g)) --> T-3(1g)(t(2g)(2)) luminescence quantum yields are 1 and approximate to0.26, respectively.