Numéro
J. Phys. Colloques
Volume 29, Numéro C4, Novembre 1968
COLLOQUE INTERNATIONAL SUR LES COMPOSÉS IV-VI
Page(s) C4-37 - C4-42
DOI https://doi.org/10.1051/jphyscol:1968405
COLLOQUE INTERNATIONAL SUR LES COMPOSÉS IV-VI

J. Phys. Colloques 29 (1968) C4-37-C4-42

DOI: 10.1051/jphyscol:1968405

PROPERTIES OF THICK EVAPORATED LAYERS OF PbTe

C. S. EVANS and J. S. SEELEY

Department of Applied Physical Sciences, University of Reading, England


Résumé
La transparence optique des couches monocristallines de PbTe peut varier après un traitement thermique suivant l'évaporation. Les monocouches ont quelques microns d'épaisseur et le recuit fait décroître la densité de porteurs d'environ 1018 cm-3 (type n) à 1017 cm-3 : le matériau de la source est à 1019 cm-3 (type p). Le processus semble faire intervenir la diffusion de O2 à un taux de réaction correspondant à une énergie de 0,83 eV.


Abstract
The changes in the optical transparency of PbTe monolayers induced by post-evaporation heat treatment are described. The monolayers are typically a few microns in thickness and heat treatment reduces the carrier density from about 1018 (n-type) per cm3 to 1017 per cm3 : the source material is 1019 (p-type) per cm3. The process seems to involve the diffusion of O2 at a reaction rate equivalent to an energy of 0.83 eV.


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