کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1496990 | 992982 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural and photo luminescent properties of uncapped nanocrystalline Cd1âxZnxS solid solutions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Uncapped nanocrystalline Cd1âxZnxS (0.0 ⩽ x ⩾ 0.5) solid solution prepared by microwave assisted combustion route shows hexagonal to cubic phase transformation for even low doping of zinc up to 5 at.% as evident from the X-ray diffraction patterns and the selected area electron diffraction patterns. The solid solutions show a considerable shift in the optical absorption edge from â¼2.43 eV (CdS) to â¼2.73 eV for the equi-atomic composition (Cd0.5Zn0.5S). The blue emission in CdS shows effect of quantum confinement. The photo luminescence spectra of Zn lean compositions (up to 5 at.%) show emergence of a peak at λ â¼Â 530 nm along with the blue emission features of CdS. However, solid solutions with higher zinc content (up to 50 at.%), show a systematic increase in the intensity of peak at 530 nm with a blue shift up to 30 at.% of zinc doping. Beyond 30%, a broad blue-green emission with full width at half maxima of â¼100 nm for Cd0.5Zn0.5S is observed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 31, Issue 2, OctoberâDecember 2008, Pages 176-180
Journal: Optical Materials - Volume 31, Issue 2, OctoberâDecember 2008, Pages 176-180
نویسندگان
Sonia Arora, S. Sundar Manoharan,