Effect of negative substrate bias on HWCVD deposited nanocrystalline silicon (nc-Si) films |
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Authors: | Bibhu P Swain Nong M Hwang |
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Institution: | National Research Laboratory of Charged Nano-particles, School of Materials Science and Engineering, Seoul National University, Seoul, South Korea |
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Abstract: | The influence of the negative substrate bias on the interfacial and microstructural characteristics of nanocrystalline silicon (nc-Si) thin films was deposited by hot wire chemical vapor deposition (HWCVD). Structural characterization of nc-Si films was performed by small angle X-ray diffraction (SAXRD), Raman spectroscopy, X-ray reflectivity (XRR) and field emission scanning electron microscopy (FESEM). Crystalline fraction and crystallite size increases from 61.31 to 74.13% and 13.3 to 21.6 nm, respectively, with an increasing negative bias from 0 to ?200 V. Furthermore, the deposition rate of nc-Si films increases from 25 to 68 nm/min by increase of negative substrate bias from 0 to ?200 V. |
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