Computer Science
Scientific paper
Apr 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.3948..382a&link_type=abstract
Proc. SPIE Vol. 3948, p. 382-388, Photodetectors: Materials and Devices V, Gail J. Brown; Manijeh Razeghi; Eds.
Computer Science
Scientific paper
A novel tipping boat for liquid phase epitaxial growth of mercury cadmium telluride from Te-rich solutions has been proposed. By optimizing the growth parameters and the construction of graphite boat it was possible to obtain in situ Hg1-xCdxTe heterostructures. The successful fabrication of long wavelength Hg1-yCdyTe/Hg1-xCdxTe heterostructures on semi-insulating CdZnTe substrates is presented. The heterostructures consist of a thin 1-2 micrometers layer on n-type 10-15 micrometers thick HgCdTe epilayer. The characterization of double-layer heterostructures was carried out using different methods. Variations in the layer thickness were determined by microscopic examination of cleaved samples. Average composition was determined from an IR absorption measurement on the central area of the layers. Chemical analysis and the Cd, Hg and Te profile compositions at different depths of the epitaxial layers were performed using secondary ion mass spectrometry. Transport properties were measured in temperature range of 77-300 K using the Van der Pauw arrangement. The paper also reports an experimental innovation of the in situ preparation of the mercury cadmium telluride heterostructures using the tipping method from Te- rich solutions performed in a one-zone reactor.
Adamiec Krzysztof
Gawron Waldemar
Larkowski Waldemar
Rogalski Antoni
Rutkowski Jaroslaw
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