کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1793000 | 1023663 | 2011 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of different oriented sapphire substrates on the growth of polar and non-polar ZnMgO by MOCVD
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Polar and non-polar ZnMgO were synthesized on different crystallographic planes (C-, R- and M-planes) of sapphire (Al2O3) substrates by metal organic chemical vapor deposition, respectively. Under the same experimental condition, polar ZnMgO nanorods were obtained on C-Al2O3 substrate whereas non-polar ZnMgO thin films were obtained on R- and M-Al2O3 substrates. The surface morphology was significantly influenced by the competition of the preferable growth directions on different sapphire substrates. On C-Al2O3 substrate, ZnMgO nanorods were vertically well-aligned with typical lengths in the range 330-360Â nm. On R- and M-Al2O3 substrates, however, ZnMgO thin films with flat surfaces were obtained, whose thickness were 150 and 20Â nm, respectively. Under the same condition, the C-ZnMgO deposited on C-Al2O3 substrate has the maximum growth velocity (11Â nm/nim), followed by A-ZnMgO deposited on R-Al2O3 substrate (5Â nm/min), and the M-ZnMgO deposited on M-Al2O3 substrate has the minimum one (0.67Â nm/min). The Near-Band-Edge (NBE) emission in Photoluminescence (PL) spectra shows a clear blueshift and a slight broadening compared with that of pure ZnO samples, which suggest that the Mg content has successfully incorporated into ZnO. The different energy blueshifts (67Â meV and 98Â meV) of the NBE emission demonstrate that A-ZnMgO deposited on R-Al2O3 substrate has higher Mg incorporation efficiency than C-ZnMgO on C-Al2O3 substrate.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 314, Issue 1, 1 January 2011, Pages 39-42
Journal: Journal of Crystal Growth - Volume 314, Issue 1, 1 January 2011, Pages 39-42
نویسندگان
K. Shi, A.L. Yang, J. Wang, H.P. Song, X.Q. Xu, L. Sang, H.Y. Wei, S.Y. Yang, X.L. Liu, Q.S. Zhu, Z.G. Wang,