RADIATION INDUCED DISSOCIATION OF Pbl2 AND OTHER HALIDES.

Y. Shapira, A. Friendenberg

Research output: Contribution to journalConference articlepeer-review

Abstract

Thin films of lead iodide decompose under band gap illumination, giving rise to iodine desorption and lead aggregates formation. Mass-spectroscopy, conductivity and photoconductivty measurements have been conducted in order to define the desorbing species and elucidate the dissociation mechanism. Desorption rates of atomic and molecular iodine were measured as functions of the Pbl//2 film temperature in the range of 300-500K, together with its dark and photoconductivity. The results suggest a model whereby the molecular desorption originates from special surface sites and undergoes a transition from a diffusion controlled process to a photohole-concentration dominated process at temperatures above 400K. The experimental results and the proposed mechanism are compared with similar recombination-induced processes in alkali halides.

Original languageEnglish
Pages (from-to)571-581
Number of pages11
JournalSemiconductors and insulators
Volume5
Issue number3 - 4
StatePublished - 1982
EventRecomb Induced Defect Form in Cryst, Proc of the US -Jpn Semin - Urbana-Champaign, IL, USA
Duration: 2 Jun 19825 Jun 1982

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