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Melt growth of pure and doped lead (II) halide single crystals

C. NEAMŢU1,* , AL. DARABONT1

Affiliation

  1. National Institute for R&D of Isotopic and Molecular Technologies, 71-103 Donath St., POB 700, 400293 Cluj-Napoca, Romania

Abstract

The growth of pure and doped PbX2 (where X = Cl, Br) single crystals is investigated. Special attention was paid to the purification of the polycrystalline source materials. The process was carried out in a controlled atmosphere of gaseous chlorine and bromine, respectively, combined with repeated horizontal zone melting and subsequent vertical Bridgman technique. The influence of the recrystallization rate and number of such recrystallization processes was studied. Pure single crystals of PbCl2 and PbBr2 (up to 15 mm in diameter and 50 mm long), of good optical quality, were grown in sealed glass ampoules by the Bridgman method. The crystals were doped with Tl+, using TlCl and TlBr, respectively, for luminescence studies..

Keywords

Lead halide, Crystal growth, Luminescence.

Submitted at: Nov. 14, 2006
Accepted at: May 15, 2007

Citation

C. NEAMŢU, AL. DARABONT, Melt growth of pure and doped lead (II) halide single crystals, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 5, pp. 1257-1259 (2007)