Structural, Optical and Ultra-Violet Photodetection Properties of ZnO Nanorods with Various Aspect Ratios
Publish Year: 1395
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JMATPR-4-3_005
تاریخ نمایه سازی: 12 مهر 1400
Abstract:
ZnO nanorods with various lengths were synthesized by a two-stage route (by changing the time of growth between ۰-۲۴۰ min) and were characterized using XRD, SEM, UV–Vis and PL techniques. The SEM and XRD results confirmed a fast growth of (۰ ۰ ۲) plane in the preferential longitudinal orientation, in contrast to lateral growth and therefore, by increasing the time of hydrothermal growth, nanorods with higher aspect ratios are obtained. Naturally, by increasing the length of nanorods, not only the average transmittance in both near ultraviolet and visible ranges is decreased, but also the PL peaks are red-shifted and extinct. Finally, ultra-violet photodetection of the samples shows that higher active surface area (with respect to the time of growth) is appropriate for photo-induced interactions leading to higher UV-sensitivity.
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Authors
Saeed Safa
Young researchers and elite groups
Elham Hasani
Physics department, Karaj-branch, Islamic Azad University, Karaj, Iran
Majid Zareh
Physics department, Karaj-branch, Islamic Azad University, Karaj, Iran
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