Mg Doping Effect on Nanoscale Crystallization and Band Gap of Sol–Gel Derived Mg x Zn1−x O (x = 0–1) Alloys
A series of Mg
x
Zn1−x
O (x = 0–1) alloyed powders with different Mg concentrations were crystallized by sol–gel technique. Their morphological variation with increased Mg content was investigated by scanning electron microscopy
(SEM). We found that the introduction of Mg2+ ions into ZnO matrix had significant influence on the crystallinity of highly Mg-incorporated alloys. In particular, different packing density and the interagglomeration of the nanoparticles give rise to textural nanosized pores in the
pure ZnO spherical particles and pure MgO hollow shells. UV-visible (UV-Vis) absorption spectra indicate that Mg doping significantly increases the band gap of Mg
x
Zn1−x
O alloys. Different alloyed crystals were also annealed in the range of 600–1000
°C to investigate their thermal stability and temperature-dependent optical properties, which indicates that the Mg concentration in the as-obtained alloys is a function of annealing temperature, thereby facilely tuning the band gap. These results suggest that Mg
x
Zn1−x
O
alloys have potential applications in a variety of optoelectronic devices.
Keywords: BAND GAP; CRYSTALLIZATION; MGXZN1-XO ALLOYS; SOL-GEL
Document Type: Short Communication
Publication date: 01 June 2011
- Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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