کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7934265 | 1512875 | 2015 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Manipulation of structural and optical properties in charge-separating ZnTe/ZnSe chalcogenide core/shell semiconductor nanocrystals: Atomistic tight-binding theory
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Manipulation of structural and optical properties in charge-separating ZnTe/ZnSe chalcogenide core/shell semiconductor nanocrystals: Atomistic tight-binding theory Manipulation of structural and optical properties in charge-separating ZnTe/ZnSe chalcogenide core/shell semiconductor nanocrystals: Atomistic tight-binding theory](/preview/png/7934265.png)
چکیده انگلیسی
The atomistic tight-binding theory (TB) is utilized to study the electronic structures and optical properties of type-II ZnTe/ZnSe chalcogenide core/shell nanocrystals. The purpose of the present study is to theoretically understand the atomistic impact of the ZnSe growth shell on the single-particle spectra, charge densities, optical band gaps, electron-hole overlaps and oscillation strengths. The sensitivity of ZnSe growth shell thickness in analyzing the electronic structures and optical properties of ZnTe/ZnSe core/shell nanocrystals reflects the charge separation of type-II band alignment. The comprehensive calculations of ZnTe/ZnSe core/shell nanocrystals are effectively manipulated by including and changing the ZnSe growth shell thickness. As a comparison, the atomistic tight-binding calculations demonstrate a reasonable agreement with effective mass approximation and experiment. Finally, the computations successfully discover the important factors of the growth shell on the natural behaviors of type-II ZnTe/ZnSe core/shell nanocrystals which affords a guideline to be implemented to the novel electronic cadmium-free nanodevices and the environmentally friendly applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 74, November 2015, Pages 457-460
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 74, November 2015, Pages 457-460
نویسندگان
Worasak Sukkabot,