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Lead(II) telluride



Lead(II) telluride
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.

Additional recommended knowledge

Contents

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

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.

See also

References

     
    This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Lead(II)_telluride". A list of authors is available in Wikipedia.
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