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https://dspace.ctu.edu.vn/jspui/handle/123456789/4860
Title: | Effects of carbon on optical properties of ZnO powder |
Authors: | Nguyễn, Tư Nguyễn, Trí Tuấn Nguyễn, Thị Khôi Đỗ, Vân Nam Đỗ, Quang Trung Phạm, Thành Huy |
Keywords: | Pure UV emitter ZnO crystals Carbon doping High-energy ball milling Photoluminescence quenching |
Issue Date: | 2016 |
Series/Report no.: | Journal of Luminescence;174 .- p.6-10 |
Abstract: | We report on C-doped ZnO, with different weight percentages of dopant, prepared by a high-energy ball milling method. The annealing conditions with temperature of 800 °C and in argon environment appear to be the optimal conditions for producing good quality crystals as well as pure UV emission. XRD and FTIR analysis indicate the substitution of C for Zn. In addition, Raman spectroscopy suggests a disordered graphitic layer covering the crystals. Photoluminescence investigation reveals the continuous quenching of visible region upon increasing C concentration and the intensity ratio between defect-related and UV emission can be as negligible as 0.02. The passivation of surface defects and the creation of a nonradiative recombination pathway by carbon integration are proposed as possible origins of the sup-pression. |
URI: | http://dspace.ctu.edu.vn/jspui/handle/123456789/4860 |
Appears in Collections: | Tạp chí quốc tế |
Files in This Item:
File | Description | Size | Format | |
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_file_ | 2.05 MB | Adobe PDF | View/Open | |
Your IP: 13.58.211.135 |
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