Lead Telluride (PbTe) Semiconductors

Topics Covered

Description
Applications
Chemical Properties
Electrical Properties
Thermal and Mechanical Properties
Safety Information

Description

Lead telluride is a compound of lead and tellurium that occurs naturally in the mineral altaite. It is a narrow gap semiconductor that has low thermal conductivity, and hence it can be used as a thermoelectric material. It is often alloyed with tin to make lead tin telluride.

Applications

Lead telluride finds applications in the following:

  • Infrared detection and imaging
  • Solar cells.

Chemical Properties

The chemical properties of lead telluride are provided in the table below:

Chemical Properties
Chemical Formula PbTe
Molecular Weight 334.8
CAS No. 1314-91-6
Group Lead – 14
Tellurium - 16
Crystal Structure Cubic
Lattice Constant 6.454 Å

Electrical Properties

The electrical properties of lead telluride are provided in the table below:

Electrical Properties
Band Gap 0.25 eV
Electron Mobility 1600 cm2/Vs
Hole Mobility 600 cm2/Vs

Thermal and Mechanical Properties

The thermal and mechanical properties of lead telluride are provided in the tables below:

Thermal Properties
Heat of Formation 393 kJ/mol
Thermal Conductivity 2.30 W/mK
Mechanical Properties
Density 8.16 g/cm3
Melting Point 907°C
Mohs Hardness 3

Safety Information

Safety Information
GHS Hazard Statements H302 - Harmful if swallowed
H332 - Harmful if inhaled
H360Df - May damage the unborn child. Suspected of damaging fertility
H373 - May cause damage to organs through prolonged or repeated exposure
H410 - Very toxic to aquatic life with long lasting effects.
Safety Precautions P201 - Obtain special instructions before use
P273 - Avoid release to the environment
P308 + P313 - If exposed or concerned: Get medical advice/ attention
P501 - Dispose of contents/ container to an approved waste disposal plant.

Comments

  1. Adam Wilson Adam Wilson United States says:

    Is the Seebeck coefficient known for this material?

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