Auger 7 minority carrier lifetime for intrinsic HgCdTe is approximately 10 times longer than the Auger 1 minority carrier lifetime:.
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14 Facts About HgCdTe
2.
HgCdTe is a soft material due to the weak bonds Hg forms with tellurium.
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3.
Thermal conductivity of HgCdTe is low; at low cadmium concentrations it is as low as 0.
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4.
HgCdTe is transparent in the infrared at photon energies below the energy gap.
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5.
HgCdTe is the only common material that can detect infrared radiation in both of the accessible atmospheric windows.
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6.
HgCdTe can detect in the short wave infrared SWIR atmospheric windows of 2.
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7.
HgCdTe is a common material in photodetectors of Fourier transform infrared spectrometers.
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8.
Many HgCdTe detectors are named after the astronomical observatories or instruments for which they were originally developed.
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9.
Main limitation of LWIR HgCdTe-based detectors is that they need cooling to temperatures near that of liquid nitrogen, to reduce noise due to thermally excited current carriers .
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10.
HgCdTe can be used as a heterodyne detector, in which the interference between a local source and returned laser light is detected.
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11.
In heterodyne detection mode HgCdTe can be uncooled, although greater sensitivity is achieved by cooling.
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12.
Main competitors of HgCdTe are less sensitive Si-based bolometers, InSb and photon-counting superconducting tunnel junction arrays.
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13.
In HgCdTe, detection occurs when an infrared photon of sufficient energy kicks an electron from the valence band to the conduction band.
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14.
Highly pure and crystalline HgCdTe is fabricated by epitaxy on either CdTe or CdZnTe substrates.
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