Graphitic carbon subnitride: Synthesis, structure, electron and proton transport, photoluminescence and thermoelectric properties
| Autor: | Valery Bortyshevskii, Valery Kremenetskii, Victor Naseka, Raisa Korzh, Oleksandr Stanovyi, Iurii Nasieka, Dmytro Trepyadko |
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| Rok vydání: | 2018 |
| Předmět: |
Photoluminescence
Materials science Heptazine Analytical chemistry chemistry.chemical_element 02 engineering and technology Electron Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Electrical resistivity and conductivity Proton transport Thermoelectric effect General Materials Science 0210 nano-technology Carbon |
| Zdroj: | Materials Chemistry and Physics. 209:95-106 |
| ISSN: | 0254-0584 |
| Popis: | We have synthesised graphitic carbon subnitride by using pyrolysis of cheap ammonium thiocyanate. We've attempted to understand the structure and properties of CN-derivatives. It has been ascertained that graphitic carbon subnitride is the heptazine adduct with N-cross-linking between graphitic planes. It had gone antiferromagnetic structure with strong visible and UV photoluminescence and pronounced thermoelectric properties. Its measured specific inner electric conductivity is 10−7…10−6 S/cm within the temperature's range 20–400 °C. The specific injected proton conductivity is 10−7…10−5 S/cm and couldn't be separated from the electron component. Both types of its conductivity depend on the relative humidity, even at 300…400 °C. A possible mechanism for this effect has been discussed. As a whole, the electromagnetic conductivity of carbon subnitride is defined by the electron component following spin wave formation. So, carbon subnitride derivatives show themselves as promising materials for spin waveguide applications including proton-exchanged specimens. Generation of an inner potential makes it possible to consider these compounds as showing prospects for power sources and thermoelectric devices. |
| Databáze: | OpenAIRE |
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