Tunability of the optical band edge in thin PbS films chemically deposited on GaAs(100)

Anna Osherov, Janos P. Makai, Janos Balazs, Zsolt J. Horvath, Nadav Gutman, Amir Saár, Yuval Golan

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The optical properties of chemical-solution-deposited thin films of lead sulfide (PbS) were investigated using infrared transmission and photoluminescence spectroscopies. The synthesized films are characterized by a wide range of microstructures, from 15 nm nanocrystals up to monocrystals. Energy bandgap values for bulk and nanostructured layers varied from 0.41 eV up to 0.48 eV, respectively. Blueshifts in both absorbance and emission peaks of the nanostructured layers were obtained due to quantum size effects. The optical properties of the films are shown to be size-dependent, with the band edge increasing with temperature.

Original languageEnglish
Article number262002
JournalJournal of Physics Condensed Matter
Volume22
Issue number26
DOIs
Publication statusPublished - Jul 7 2010

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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