Please use this identifier to cite or link to this item:
|Title:||Medium range order engineering in amorphous silicon thin films for solid phase crystallization||Authors:||Law, F.
|Issue Date:||21-May-2013||Citation:||Law, F., Widenborg, P.I., Luther, J., Hoex, B. (2013-05-21). Medium range order engineering in amorphous silicon thin films for solid phase crystallization. Journal of Applied Physics 113 (19) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.4807166||Abstract:||In recent years, it has been recognized that medium range ordering (MRO) in amorphous silicon (a-Si:H) plays a role in controlling its solid phase crystallization (SPC) behavior. Information on the MRO can be obtained from the width of the first X-ray diffraction (XRD) peak of a-Si:H centered around 2θ = 27.5°. The broader the full width half maximum (FWHM) of the first XRD peak, the less ordered the a-Si:H material in the medium range length scale (up to 5 nm). In this work, it was found that the FWHM of the first XRD peak changes with the pressure used during the deposition of a-Si:H. A threshold SPC behavior was observed as a function of the a-Si:H deposition pressure and a good correlation between the SPC behavior and the a-Si:H XRD peak width was found. Results in this study indicate that higher MRO in a-Si:H led to faster SPC rates and smaller grain sizes, suggesting the presence of relatively active and high density of nucleation sites. High angle annular dark field scanning transmission electron microscopy and ultraviolet reflectance indicate that films with higher MRO yielded polycrystalline silicon (poly-Si) grains which were more defective and non-columnar in morphology. Results suggest that a-Si:H material with lower MRO were preferred as a precursor for SPC, which forms a better quality poly-Si thin film material. It was proposed that ion bombardment seems to play a role in altering the a-Si:H properties. © 2013 AIP Publishing LLC.||Source Title:||Journal of Applied Physics||URI:||http://scholarbank.nus.edu.sg/handle/10635/64943||ISSN:||00218979||DOI:||10.1063/1.4807166|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 20, 2020
WEB OF SCIENCETM
checked on Feb 12, 2020
checked on Feb 17, 2020
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.