Polycrystalline PbSe on a polyimide substrate

G. Radovsky, Z. Dashevsky, V. Kasiyan, M. Auslender, S. Hava

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


In addition to the films of lead salts used in the photoconductive IR detectors, we quest for the polycrystalline films appropriate to the photovoltaic detectors. This work focues on PbSe, for it exhibits Auger coefficient much lower than HgCdTe and still lower compared to PbTe. To provide thermal and mechanical stability, we chose a pseudo-crystalline polyimide for being the films deposition substrate. Various regimes regarding the substrate temperature at the deposition process, and its duration managing the film thickness, were probed. The films were characterized structurally and morphologically. To determine the type of carriers, their concentration and mobility, effect of Hall and electrical conductivity were measured in the range 77300 K. To infer on the optical quality of the films, the IR reflectance and transmittance spectra at 300K were measured in the range 15.3 μm. These diverse characterizations allowed us to find a regime optimal for growing the films with good grain crystallinity and relatively small surface roughness. Using optical bi-layer model, we showed that the measured IR spectra of these films are compatible with some effective-medium complex refractive index, the extracted effective band gap energy being about the same as that for bulk PbSe.

Original languageEnglish
Pages (from-to)6-13
Number of pages8
JournalJournal of Alloys and Compounds
Issue number1
StatePublished - 2 Jul 2010


  • AFM
  • Computer simulations
  • Electrical transport
  • Grain boundaries
  • Light absorption and reflection
  • Optical materials
  • Optical properties
  • Optical spectroscopy
  • SEM
  • Semiconductors (IV-VI)
  • Thin films
  • Vapor deposition
  • X-ray diffraction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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