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- W1857600146 abstract "Abstract In this work, the various chemical stoichiometry (O/Si ratios) of silicon-rich SiO 2 (SRO) thin films were deposited and then annealed by rapid thermal annealing (RTA) to form SiO 2 -matrix silicon nanocrystals (Si–NCs). The effects of the O/Si ratios on the structural properties of SRO thin films were investigated systematically using Raman spectroscopy, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Results showed that the micro-structure of as-deposited SRO thin films with higher O/Si ratios hindered formation of Si–Si 4 clusters, Si clusters and Si rings, then hindered the phase separation and the crystallization of annealed thin films. When the O/Si ratios was increased from 0.7 to 1.5, the crystalline temperature was increased from 900 °C to 1000 °C, the crystalline fraction of the 1000 °C-annealed thin films was reduced from 39.4% to 22.7%, the average Si–NC size was reduced from 3.8 nm to 3 nm, and the residual stress was increased from 1.9 GPa to 2.8 GPa, respectively. The changes in micro-structure were most possibly due to the fact that the different amount of Si-O bonds in the as-deposited thin films with various O/Si ratios." @default.
- W1857600146 created "2016-06-24" @default.
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- W1857600146 date "2015-11-01" @default.
- W1857600146 modified "2023-09-23" @default.
- W1857600146 title "Effects of chemical stoichiometry on the structural properties of Si-rich oxide thin films" @default.
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- W1857600146 doi "https://doi.org/10.1016/j.tsf.2015.10.040" @default.
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