Effect of Mg doping on optical and electrical properties of SnO2 thin films: An experiment and first-principles study
Source abstract
Abstract
Abstract Transparent Mg-doped p-type conductive SnO 2 thin films were fabricated on quartz substrates by sol–gel method. Effect of Mg doping on structural, morphological, optical, and electrical properties of SnO 2 films were investigated. A single phase of tetragonal rutile structure was observed in Mg-doped SnO 2 films. The optical bandgap energy of the Mg-doped SnO 2 films showed a systematical redshift with respect to the undoped SnO 2 film, and the resistivity significantly increased with the increase of Mg concentration. A conduction type transform from n to p was also observed. The strong ultraviolet and comparatively weak blue/green emissions were observed in room temperature photoluminescence, suggesting the dipole-forbidden rule of bulk SnO 2 is broken in Mg-doped SnO 2 films. These results were supported by first-principles electronic structure calculations.
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Research context
OpenAlex topics: ZnO doping and properties · Gas Sensing Nanomaterials and Sensors · Transition Metal Oxide Nanomaterials
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