Preparation and characterization of nanocrystalline La-doped ZnO powders through a mechanical milling and their optical properties
Source abstract
Abstract
Abstract Structural and optical properties of mechanically milled La-doped ZnO powders are presented in this paper. The Zn 1− x La x O phase formed when x varied in a range of 0.02–0.06 and milled at 400 rpm for 20 h. The secondary La 2 O 3 phase occurred with an increase of La content. The crystallite and particle size decreased as a function of La content as x = 0–0.14 due to the effect of Zener pinning and solute drag. The absorption edge shifted to a lower wavelength when La content was increased to x = 0.14 because of the size effect. The energy band gap of Zn 1− x La x O powders varied in a range of 2.96–3.12 eV depending on the crystallite size. The broad emission bands in a visible region centered at about 640 nm are attributed to oxygen deficiency.
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Research context
OpenAlex topics: ZnO doping and properties · Gas Sensing Nanomaterials and Sensors · Copper-based nanomaterials and applications
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References (17)
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