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- W2025045108 abstract "Abstract In this paper, the synthesis of heavily La-doped α-Si 3 N 4 nanowires is firstly reported via nitriding the cryomilled La-doped nanocrystalline Si powder. The crystal structure, electronic structure and band structure of La-doped α-Si 3 N 4 are calculated by using the CASTEP program code based on the first principles plane-wave pseudo-potential method. The microstructure and photoluminescence of heavily La-doped α-Si 3 N 4 nanowires are investigated. The results suggest that La has been already incorporated into Si lattice after the cryomilling process and then successfully entered the lattice of α-Si 3 N 4 with the nitridation process. The as-synthesized heavily La-doped α-Si 3 N 4 nanowires show high purity and good crystallinity with 30–40 nm in diameter and several tens of micrometers in length. The optical property shows that there is an intense violet–blue visible emission from 350 nm to 450 nm with one peak at 388 nm due to the recombination between the valence band and the N 4 + level at room temperature, which is in agreement with the calculated band structure of La-doped α-Si 3 N 4 ." @default.
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- W2025045108 date "2014-07-01" @default.
- W2025045108 modified "2023-09-27" @default.
- W2025045108 title "Synthesis and photoluminescence of heavily La-doped α-Si3N4 nanowires via nitriding cyromilled nanocrystalline La-doped silicon powder" @default.
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- W2025045108 doi "https://doi.org/10.1016/j.jlumin.2014.01.071" @default.
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