Adigun, Oluwole Daniel ; Ricohermoso, Emmanuel III ; Daniyan, Ayodele Abeeb ; Umoru, Lasisi Ejibunu ; Ionescu, Emanuel (2022)
Structure and Electrical Properties of Carbon-Rich Polymer Derived Silicon Carbonitride (SiCN).
In: Ceramics, 5 (4)
doi: 10.3390/ceramics5040050
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
This article reports on the structure and electronic properties of carbon-rich polysilazane polymer-derived silicon carbonitride (C/SiCN) corresponding to pyrolysis temperatures between 1100 and 1600 degrees C in an argon atmosphere. Raman spectroscopy, X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), Scanning Electron Microscopy (SEM) and Hall measurements were used to support the structural and electronic properties characterization of the prepared C/SiCN nanocomposites. A structural analysis using Raman spectroscopy showed the evolution of sp(2) hybridized carbon phase that resulted from the growth in the lateral crystallite size (L-a), average continuous graphene length including tortuosity (L-eq) and inter-defects distance (L-D) with an increase in pyrolysis temperature. The prepared C/SiCN monoliths showed a record high room temperature (RT) electrical conductivity of 9.6 S/cm for the sample prepared at 1600 degrees C. The electronic properties of the nanocomposites determined using Hall measurement revealed an anomalous change in the predominant charge carriers from n-type in the samples pyrolyzed at 1100 degrees C to predominantly p-type in the samples prepared at 1400 and 1600 degrees C. According to this outcome, tailor-made carbon-rich SiCN polymer-derived ceramics could be developed to produce n-type and p-type semiconductors for development of the next generation of electronic systems for applications in extreme temperature environments.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Adigun, Oluwole Daniel ; Ricohermoso, Emmanuel III ; Daniyan, Ayodele Abeeb ; Umoru, Lasisi Ejibunu ; Ionescu, Emanuel |
| Art des Eintrags: | Bibliographie |
| Titel: | Structure and Electrical Properties of Carbon-Rich Polymer Derived Silicon Carbonitride (SiCN) |
| Sprache: | Englisch |
| Publikationsjahr: | Dezember 2022 |
| Verlag: | MDPI |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Ceramics |
| Jahrgang/Volume einer Zeitschrift: | 5 |
| (Heft-)Nummer: | 4 |
| DOI: | 10.3390/ceramics5040050 |
| Kurzbeschreibung (Abstract): | This article reports on the structure and electronic properties of carbon-rich polysilazane polymer-derived silicon carbonitride (C/SiCN) corresponding to pyrolysis temperatures between 1100 and 1600 degrees C in an argon atmosphere. Raman spectroscopy, X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), Scanning Electron Microscopy (SEM) and Hall measurements were used to support the structural and electronic properties characterization of the prepared C/SiCN nanocomposites. A structural analysis using Raman spectroscopy showed the evolution of sp(2) hybridized carbon phase that resulted from the growth in the lateral crystallite size (L-a), average continuous graphene length including tortuosity (L-eq) and inter-defects distance (L-D) with an increase in pyrolysis temperature. The prepared C/SiCN monoliths showed a record high room temperature (RT) electrical conductivity of 9.6 S/cm for the sample prepared at 1600 degrees C. The electronic properties of the nanocomposites determined using Hall measurement revealed an anomalous change in the predominant charge carriers from n-type in the samples pyrolyzed at 1100 degrees C to predominantly p-type in the samples prepared at 1400 and 1600 degrees C. According to this outcome, tailor-made carbon-rich SiCN polymer-derived ceramics could be developed to produce n-type and p-type semiconductors for development of the next generation of electronic systems for applications in extreme temperature environments. |
| Freie Schlagworte: | Polymer derived ceramics (PDC), silicon carbonitride (SiCN), semiconductorfreesp(2)-hybridized carbon, nanocomposite, high-temperaturetransport-properties, Raman-spectroscopyceramics, conductivity, graphene, microstructure, nanostructure, energetics, pyrolysis |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
| Hinterlegungsdatum: | 26 Jan 2023 06:39 |
| Letzte Änderung: | 26 Jan 2023 06:52 |
| PPN: | 504083090 |
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