Self-trapped states and the related luminescence in PbCl$_2$ crystals

Details Self-trapped states and the related luminescence in PbCl$_2$ crystals Self-trapped states and the related luminescence in PbCl$_2$ crystals

2002-04-22

arxiv.org/abs/cond-mat/0204458v3

Phys. Rev. B 66, 064304 (2002).

Physics

Condensed Matter

Materials Science

8 pages (10 figures), ReVTEX; removal of one figure, Fig. 3 in the version 2

Scientific paper

10.1103/PhysRevB.66.064304

We have comprehensively investigated localized states of photoinduced electron-hole pairs with electron-spin-resonance technique and photoluminescence (PL) in a wide temperature range of 5-200 K. At low temperatures below 70 K, holes localize on Pb$^{2+}$ ions and form self-trapping hole centers of Pb$^{3+}$. The holes transfer to other trapping centers above 70 K. On the other hand, electrons localize on two Pb$^{2+}$ ions at higher than 50 K and form self-trapping electron centers of Pb$_2$$^{3+}$. From the thermal stability of the localized states and PL, we clarify that blue-green PL band at 2.50 eV is closely related to the self-trapped holes.

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