Journal
CERAMICS INTERNATIONAL
Volume 48, Issue 9, Pages 12971-12978Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2022.01.170
Keywords
Silicon carbide; Molten salt method; Heterojunction; Photoluminescence; Blue shift
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Funding
- National Science Fund for Distin-guished Young Scholars [52025041]
- National Natural Science Foundation of China [51974021, 51902020, 51904021]
- Fundamental Research Funds for the Central Universities [FRF-TP-18-045A1, FRF-TP-19-004B2Z]
- National Postdoctoral Program for Innovative Talents [BX20180034]
- open foundation of Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University [2021GXYSOF12]
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Silicon carbide nanowires (SiC NWs) were synthesized using graphene and Si powder, forming a 2H/3C-SiC heterojunction structure, with significant blue shift in the photoluminescence spectra due to structural defects.
Silicon carbide nanowires (SiC NWs) were successfully synthesized using graphene and Si powder as raw materials in NaCl-NaF at 1300-1400 degrees C for 6 h. The synthesized SiC NWs have two crystal phases due to the presence of molten salt, which formed the 2H/3C-SiC heterojunction structure. The possible synthesis mechanism of SiC NWs is dissolution-diffusion-reaction . Besides, photoluminescence (PL) spectra of 2H/3C-SiC heterojunction NWs show that the main emission peak has a significant blue shift, locating in 350-600 nm. The main reason is caused by the defects of 2H/3C-SiC heterojunction structure and the spontaneous polarization of 2H-SiC nano segments.
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