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Proceedings Paper

Excitonic states of Pb ion clusters dispersed in CdI2
Author(s): Tetsusuke Hayashi; Ping Gu; Masayuki Watanabe
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Paper Abstract

Evolution of excitonic luminescence has been investigated in Pb1-xCdxI2 solid solutions over the whole range of composition. A significant change in the luminescence characteristics is found to occur at the composition x around 0.5, which corresponds to percolation threshold of the substituted metal ions. The luminescence in the crystals with x larger than 0.5 is associated with PbI2 clusters dispersed in CdI2 matrix. Time- resolved measurements of the emission spectra reveal that the luminescence consists of singlet and triplet components. The energy split between the singlet and triplet states increases with the decrease in the cluster size. The origin of the triplet state is discussed.

Paper Details

Date Published: 9 February 1995
PDF: 8 pages
Proc. SPIE 2362, International Conference on Excitonic Processes in Condensed Matter, (9 February 1995); doi: 10.1117/12.200949
Show Author Affiliations
Tetsusuke Hayashi, Kyoto Univ. (Japan)
Ping Gu, Kyoto Univ. (Japan)
Masayuki Watanabe, Kyoto Univ. (Japan)

Published in SPIE Proceedings Vol. 2362:
International Conference on Excitonic Processes in Condensed Matter
Jai Singh, Editor(s)

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