Lead(II) telluride

From Wikipedia, the free encyclopedia

Lead(II) telluride
Image:Lead(II) telluride.jpg
Other names Lead telluride
Identifiers
CAS number [1314-91-6]
Properties
Molecular formula PbTe
Molar mass 334.80 g/mol
Density 8160 kg.m-3
Melting point

924 °C
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references

Lead telluride is a compound of lead and tellurium (PbTe); it is a narrow gap semiconductor. The CAS registry number is 1314-91-6.

Contents

[edit] Properties

  • Dielectric constant ~1000.
  • Electron Effective mass ~ 0.01me
  • Energy gap, ΔEg=0.25 eV|T=0 K; 0.32 eV|T=300 K
  • Electron mobility, μn=1600 cm²/(V.s)>|T=0 K6000 cm²/(V.s)>|T=300 K
  • Hole mobility, μp=600 cm²/(V.s)>|T=0 K4000 cm²/(V.s)>|T=300 K

[edit] Applications

It is often alloyed with tin to make lead tin telluride, which is used as an infrared detector material. It also has good performance as a thermoelectric material, partly due to a low thermal conductivity.

It occurs naturally as the mineral altaite.

[edit] See also

[edit] References

 This article does not cite any references or sources. (September 2007)
Please help improve this article by adding citations to reliable sources. Unverifiable material may be challenged and removed.

[edit] External links

 This material-related article is a stub. You can help Wikipedia by expanding it.
Languages