Postgrowth Control of the Interfacial Oxide Thickness in Semiconductor–Insulator–Semiconductor Heterojunctions

Nitzan Maman, Tzvi Templeman, Hadar Manis-Levi, Michael Shandalov, Vladimir Ezersky, Gabby Sarusi, Yuval Golan, Iris Visoly-Fisher

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The electronic properties of the heterojunction formed by chemical bath deposition of a thorium- and oxygen-doped PbS nanostructured layer on GaAs substrate as a function of postgrowth thermal treatments are studied. A correlation is found between the heterojunction conductance and the duration of thermal treatment in air. In contrast to previous reports on the effect of air annealing on PbS films, where the conductance increased due to oxygen incorporation within the PbS, in this oxygen-saturated system, the PbS properties are unaffected by exposure to oxygen. Control over the heterojunction conductance is achieved by tuning the interface oxide thickness, enabled by thermal treatment in air, resulting in the elimination of Fermi level pinning caused by interface induced gap states. The ability to control the interfacial insulator thickness post film-growth is a unique feature of this system.

Original languageEnglish
Article number1800231
JournalAdvanced Materials Interfaces
Issue number12
StatePublished - 22 Jun 2018


  • chemical bath deposition
  • heterojunction
  • oxide thickness
  • postgrowth
  • semiconductor–insulator–semiconductor

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering


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