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

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

Research output: Contribution to journalArticlepeer-review

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Abstract

In this work, the oxygen treatment of 1 μm 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 (Ta=400 °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.

Original languageEnglish
Pages (from-to)2380-2384
Number of pages5
JournalPhysica B: Condensed Matter
Volume405
Issue number10
DOIs
StatePublished - 15 May 2010

Keywords

  • Lead telluride films
  • Oxygen treatment
  • Photosensitivity

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