کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8032939 | 1517963 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nanostructural dependence of photoluminescence and photosensing properties in hydrothermally synthesized Mg-doped ZnO nanorod arrays
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, the Mg doping effects on the nanostructural dependence of photoluminescence and the photosensing properties in Zn1âxMgxO (xâ¯=â¯0.01, 0.03, and 0.05) nanorod arrays were systematically examined. The vertical-aligned nanorod arrays were separately grown on ZnO-seeded n-Si substrates via a low-temperature hydrothermal process. X-ray diffraction analysis revealed that all Zn1âxMgxO nanorod arrays exhibited the same preferentially c-oriented wurtzite structure. Images of all the Zn1âxMgxO nanorod arrays provided by field emission scanning electron microscope showed that both the length and diameter of the Zn1âxMgxO nanorod arrays increased with increasing Mg doping concentration. Also, an enhanced blue-shifted ultraviolet (UV) emission and a reduced visible emission were observed from the photoluminescence spectra of the Zn1âxMgxO nanorod arrays. The former indicated the decrease of defects and the latter indicated the enhancement of the crystallinity and the increase in optical bandgap. Current-voltage curves were separately measured in the dark and under UV illumination. Finally, the mechanism of the Mg doping effects on the corresponding defects, bandgap, and UV photosensing characteristics of the Zn1âxMgxO nanorod arrays was investigated in detail.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 649, 1 March 2018, Pages 75-80
Journal: Thin Solid Films - Volume 649, 1 March 2018, Pages 75-80
نویسندگان
Xiao-Lan Tang, San-Lin Young, Chung-Yuan Kung, Ming-Cheng Kao, Hone-Zern Chen, Chung-Jen Ou,