Abstract
The interrelation between the intrinsic emission bands of NaI and KI has been examined by observing changes of luminescence spectra and their decay profiles in mixed Na 1- x K x I crystals at 10 K. As x is increased from 0 to 1, the π emission band of NaI changes continuously into the σ emission band of KI. Furthermore, the decay component with a long lifetime (∼100 ns) diminishes, while the component with a short lifetime (∼1.0 ns) intensifies. An emission band changing into the π band of KI appears above x =0.95. It is concluded that the self-trapped exciton (STE) responsible for the π band of NaI corresponds to that for the σ band, rather than the π band, of KI. Lattice configurations of initial states for these emission bands are briefly discussed in connection with the recent off-center model of the STE.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
