Enhanced blue-green emission and ethanol sensing of Co-doped ZnO nanocrystals prepared by a solvothermal route
Source abstract
Abstract
In this paper, we report the structure, optical, and gas-sensing properties of Co-doped ZnO nanocrystals prepared by a simple solvothermal route. The red-shift of the band-gap edge is attributed to a merging of donor and conduction bands due to Co doping. Photoluminescence (PL) spectra were used to study the dependence of doping on the deep-level emission, which show obvious enhanced blue-green emission after Co doping. Gas sensors were prepared and tested for the detection of C2H5OH in air. It is found that the Co-doped nanocrystals have a significantly better sensing performance than pure ZnO, which is comparable to the Au-functionalized ZnO sensors. We provide a possible explanation in terms of the sensing mechanism of the surface reaction process.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: ZnO doping and properties · Gas Sensing Nanomaterials and Sensors · Mercury impact and mitigation studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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