Epitaxial layers of mercury cadmium telluride
false(Hg1−xCdxnormalTefalse)
with Cd composition (
x
value) from 0.17 to 1.0 have been grown in Te solution by a liquid phase epitaxial (LPE) technique. The layers are grown on
normalCdTe
substrates with (100), (110), (111)Cd, and (111)Te orientations. The best surface is obtained on the (111)Cd surface. Typical hole concentration of
normalHgCdTe
layers with Cd composition of 0.2 is on the order of
5×1016/cm3
with a Hall mobility of 400 cm2/Vsec at 77°K. X‐ray topographic analysis indicates that these epilayers have as good a crystalline structure as that of the substrates.
Pb0.76Sn0.24Te/PbTe inverted heterostructure mosaics were fabricated from epilayers grown by a liquid-phase-epitaxy technique. At 85 K, the spectral peak of these diodes occurred at 13 μm with a spectral cutoff at 14.2 μm. This response is believed to be one of the longest that has ever been reported for PbSnTe infrared detectors near LN2 temperature. The spectral cutoff, as expected, shifted toward a longer wavelength as the temperature was lowered; however, it reached a maximum at 30 K, beyond which the spectral response exhibited a retrograde characteristic. This behavior is explicable from the combined temperature dependencies of the energy gap, the Fermi level, and the thermal broadening of the optical transitions.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.