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   Articles with "polytype" as a keyword



Tribo-mechanical characterization of SPS processed, phase pure 15R-SiAlON polytype: Effect of sintering temperature

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recommendations! Published in 2018 at "Ceramics International"

DOI: 10.1016/j.ceramint.2018.07.099

Abstract: The work reports tribo-mechanical properties of spark plasma sintering processed dense, phase pure 15R-SiAlON polytype in the absence of any external sintering additive. At low sintering temperatures (1600-1700 degrees C), the polytype was similar to… read more here.

Keywords: tribo mechanical; polytype; effect; 15r sialon ... See more keywords

Effect of nitrogen and aluminium on silicon carbide polytype stability

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recommendations! Published in 2019 at "Journal of Crystal Growth"

DOI: 10.1016/j.jcrysgro.2019.04.018

Abstract: Abstract In this study, effects of nitrogen and aluminium dopant on the SiC crystal structure and polytype stability were investigated by density functional theory. With taking account of the stacking energy of additional bilayer, the… read more here.

Keywords: polytype stability; nitrogen aluminium; polytype;

Nature of Hexagonal Silicon Forming via High-Pressure Synthesis: Nanostructured Hexagonal 4H Polytype.

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recommendations! Published in 2018 at "Nano letters"

DOI: 10.1021/acs.nanolett.8b02816

Abstract: Hexagonal Si allotropes are expected to enhance light absorption in the visible range as compared to common cubic Si with diamond structure. Therefore, synthesis of these materials is crucial for the development of Si-based optoelectronics.… read more here.

Keywords: polytype; pressure synthesis; high pressure; nature hexagonal ... See more keywords

Shallow-level defect passivation by 6H perovskite polytype for highly efficient and stable perovskite solar cells

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recommendations! Published in 2024 at "Nature Communications"

DOI: 10.1038/s41467-024-50016-6

Abstract: The power conversion efficiency of perovskite solar cells continues to increase. However, defects in perovskite materials are detrimental to their carrier dynamics and structural stability, ultimately limiting the photovoltaic characteristics and stability of perovskite solar… read more here.

Keywords: stability; solar cells; shallow level; polytype ... See more keywords

On the impact of nitrogen and aluminum doping on silicon carbide polytype stability: Insights from first principle calculations

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recommendations! Published in 2024 at "Journal of the American Ceramic Society"

DOI: 10.1111/jace.20284

Abstract: Silicon carbide (SiC) can form many different polytypes but their energetic ordering and frequency of occurrence are still not fully understood. In this study, polytype stability in pure and doped SiC as well as charged… read more here.

Keywords: silicon carbide; principle calculations; first principle; polytype ... See more keywords