Influence of Al doping on structural and optical properties of hydrothermally grown ZnO nanorods
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In this work, aluminum (Al) doped ZnO nanorods (NRs) were prepared by hydrothermal method by doping Al with 1, 2 and3 in weight percentage (wt. %) in addition to undoped ZnO NR. The influence of Al doping on the structural and opticalproperties of ZnO NRs were studied in this paper systematically. The surface morphology and optical properties of all thedoped and undoped ZnO NRs samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM),UV–vis spectroscopy and photoluminescence (PL) measurements. We found that the Al doping affected the structural andoptical properties of the ZnO NRs, including their PL properties, absorption values and optical band gaps etc. It is observedfrom PL as well as UV-Vis spectroscopy that the bandgap value increases gradually with increase of the Al dopantsconcentration due to Burstein-Moss effect. The variation of bandgap according to Al dopants was extracted from PL also andcompared with that of the UV-vis results.
Abstract
In this work, aluminum (Al) doped ZnO nanorods (NRs) were prepared by hydrothermal method by doping Al with 1, 2 and3 in weight percentage (wt. %) in addition to undoped ZnO NR. The influence of Al doping on the structural and opticalproperties of ZnO NRs were studied in this paper systematically. The surface morphology and optical properties of all thedoped and undoped ZnO NRs samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM),UV–vis spectroscopy and photoluminescence (PL) measurements. We found that the Al doping affected the structural andoptical properties of the ZnO NRs, including their PL properties, absorption values and optical band gaps etc. It is observedfrom PL as well as UV-Vis spectroscopy that the bandgap value increases gradually with increase of the Al dopantsconcentration due to Burstein-Moss effect. The variation of bandgap according to Al dopants was extracted from PL also andcompared with that of the UV-vis results.
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