Influence of oxygen treatment on transport properties of PbTe:In polycrystalline films

    Authors

    Z. Dashevsky; E. Shufer; V. Kasiyan; E. Flitsiyan;L. Chernyak

    Comments

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    Abbreviated Journal Title

    Physica B

    Keywords

    Lead telluride films; Oxygen treatment; Photosensitivity; PBS-TYPE FILMS; PHYSICAL-PROPERTIES; CONDUCTIVITY; OXIDATION; DIFFUSION; LAYERS; Physics, Condensed Matter

    Abstract

    In this work, the oxygen treatment of 1 mu m thick n-type PbTe:In films was studied. Two main processes induced during the thermal treatment in oxygen atmosphere were identified. The inversion of the type of electrical conductivity in PbTe:In films from n- to p-type was observed after the thermal treatment in oxygen (T(a) = 400 degrees C). This effect is related to indium segregation at the film surface. The photoconductivity demonstrated in PbTe:In films after oxygen treatment is due to oxygen diffusion along the grain boundaries and the creation of potential relief, which separates electron-hole pairs at the boundaries under light illumination. (C) 2010 Elsevier B.V. All rights reserved.

    Journal Title

    Physica B-Condensed Matter

    Volume

    405

    Issue/Number

    10

    Publication Date

    1-1-2010

    Document Type

    Article

    Language

    English

    First Page

    2380

    Last Page

    2384

    WOS Identifier

    WOS:000277776200005

    ISSN

    0921-4526

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