mercury-cadmium-telluride (hgcdte)

HgCdTe (MCT)

Hg1-xCdxTe (mercury cadmium telluride) is narrow direct bandgap alloy with a tunable bandgap spanning the shortwave infrared to the very long wave infrared regions.HgCdTe is the only common material that can detect infrared radiation in both of the accessible atmospheric windows. These are from 3 to 5 µm (the mid-wave infrared window, abbreviated MWIR) and from 8 to 12 µm (the long-wave window, LWIR).HgCdTe is a common material in photodetectors of Fourier transform infrared spectrometers.


Mercury Cadmium Telluride (Hg1-xCdxTe)

Bulk single crystals

Technical data

  Material: bulk single crystal MCT



N-type or P–type (or No doped)


Not less than 50 mm

  Wafer planks, thickness

>5x15 mm, 0.5 - 1.0 mm

  Wafer surface finish

As-cut, polish 2 side


[100], [111], [110]

  Mole fraction of CdTe, (x)

0.15-0.18, 0.19–0.21, 0.26-0.30

 Composition heterogeneity along a wafer,  mole fraction

no more x= 0,005

Electron carrier concentration, 77°K

N - (0.5-10)·1014; P - (0.8-100)·1015

μ n mobility for N type @ 77°K, cm2/V·s

>= 1·105  

μ p mobility for P type @ 77°K, cm2/V·s

>= (0.02 – 3)·104  

  Etch pit density, cm-2

<= 2·105


We supply crystals and wafers according to customer’s requirements.