کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8148759 | 1524344 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Molecular beam epitaxial growth, transmittance and photoluminescence spectra of zinc-blende CdTe thin films with high-quality on perovskite SrTiO3 (1â¯1â¯1) substrates
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
High-crystalline quality CdTe thin films are grown on the largely lattice-mismatched SrTiO3 (STO) (1â¯1â¯1) substrates by molecular beam epitaxy. A transformation from a three dimensional regime to a two dimensional one is observed by the reflection high energy electron diffraction (RHEED) and atomic force microscopy (AFM). The formation of an elastic deformation CdTe layer on STO (1â¯1â¯1), namely a pseudomorphic growth mode with a critical thickness of â¼40â¯nm, is supported by the RHEED, AFM and X-ray diffraction. Crystal structures and epitaxial relationships of CdTe epitaxial films on STO (1â¯1â¯1) are characterized by 2θ-Ï scans and reciprocal space mapping. Two strong absorption peaks at the energies of â¼1.621â¯eV and â¼1.597â¯eV at 5â¯K are clearly observed for a â¼120â¯nm thick CdTe epitaxial film, which are proposed to be ascribed to the strained and unstrained epitaxial CdTe layers, respectively. Moreover, the presence of the exciton band while the absence of deep level defect states for the â¼120â¯nm thick CdTe film characterized by the temperature dependent photoluminescence spectra further supports the high-crystalline quality.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 485, 1 March 2018, Pages 41-48
Journal: Journal of Crystal Growth - Volume 485, 1 March 2018, Pages 41-48
نویسندگان
Kun Song, Xuanting Zhu, Kai Tang, W. Bai, Liangqing Zhu, Jing Yang, Yuanyuan Zhang, Xiaodong Tang, Junhao Chu,