کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8148384 1524332 2018 24 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nucleation and islands growth of CdZnTe(0 0 1) epitaxial films on GaAs(0 0 1) substrates by close spaced sublimation
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Nucleation and islands growth of CdZnTe(0 0 1) epitaxial films on GaAs(0 0 1) substrates by close spaced sublimation
چکیده انگلیسی
The early stages of close spaced sublimation growth of CdZnTe(0 0 1)/GaAs(0 0 1) epilayer were experimentally studied under different substrate temperatures and ambient pressures. SEM, AFM, XRD, EBSD and EDS were used for the characterization of morphology, structure and composition of the films. The films were found to be (0 0 1) oriented and epitaxial in nature with zinc blende cubic structure. Deposition models were used to explain the correlation between growth condition and CdZnTe island morphology. Films grown at 350 °C and 1 × 102 Pa show the best uniform and smooth surface. When increasing substrate temperature to 430 °C or ambient pressure to 1 × 104 Pa or 3 × 104 Pa, islands are less compact and exhibit preferential growth along one of 〈1 1 0〉 directions, which could be resulted from the big lattice mismatch (14.0%) of Cd0.9Zn0.1Te(0 0 1)/GaAs(0 0 1) heterojunction. For the growth at 430 °C in 3 × 104 Pa, prior nucleation at defect site was found, and the appearance of regular 〈0 1 0〉 oriented island edges proposes that steps 〈0 1 0〉{1 0 0} are more stable for CdZnTe(0 0 1)/GaAs(0 0 1) epilayer than steps 〈1 1 0〉{1 1 1}.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 498, 15 September 2018, Pages 197-201
نویسندگان
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