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PbS, PbSe, PbTe
PbTe, PbSe and PbS
Lead compounds (PbS, PbSe and PbTe) are direct bandgap semiconductor materials whose application is confined to infrared detecting and thermal imaging. These semiconductors operate at wavelengths of 1-5.5 µm. They perform well at room temperature but can be cooled if better sensitivity is required. PbTe, PbSe and PbS detectors are widely used in flame detection, combustion control, non-contact temperature measurement, gas and moisture control, spectrophotometry, analytical and medical imaging.

Basic properties

Material PbSPbSePbTe
Structure Cubic (NaCL-type)  
Density 7.60 g/ cm38.15 g/ cm38.16 g/ cm3
Thermal conductivity (at 25 deg C) 0.03 W/cmK0.0170.017
Refractive index (λ= 6 µm) 4.194.545.48
Direct bandgap 0.37 eV0.27 eV0.32 eV


PbS, PbSe, PbTe rods, wafers and substrates

Diameter/Width 55 mm
Thickness/length 0.1-30 mm
Surface quality 80/50, 60/40, 40/20 per MIL-0-13830
Orientation (100)



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