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Growth of epitaxial nanoscale columnar copper indium diselinide thin films by introduction of sodium flouride during growth
Kardel, Justin Tynes
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https://hdl.handle.net/2142/92674
Description
- Title
- Growth of epitaxial nanoscale columnar copper indium diselinide thin films by introduction of sodium flouride during growth
- Author(s)
- Kardel, Justin Tynes
- Issue Date
- 2016-07-27
- Director of Research (if dissertation) or Advisor (if thesis)
- Rockett, Angus A.
- Department of Study
- Materials Science & Engineerng
- Discipline
- Materials Science & Engr
- Degree Granting Institution
- University of Illinois at Urbana-Champaign
- Degree Name
- M.S.
- Degree Level
- Thesis
- Date of Ingest
- 2016-11-10T17:49:14Z
- Keyword(s)
- CuInSe2 (CIS)
- Copper indium gallium diselinide (CIGS)
- Thin Films
- Epitaxy
- Nanostructures
- Nanowires
- Abstract
- The effect of NaF on the growth of CuInSe2 (CIS) epitaxial thin films by a hybrid sputtering and evaporation method was studied. Low levels of NaF deposition during interruptions of epitaxial growth reduced surface roughness. Larger amounts of NaF resulted in columnar epitaxial films with <112> surface facets on the sides of the columns. X-ray diffraction shows all films to be largely epitaxial, with small amounts of (301)-surface-oriented CIS grains present in films with the highest NaF addition. In the columnar films, a buildup of Na was seen near the substrate/film interface, suggesting that Na is buried during columnar growth. I conclude that the Na plays an integral role in the creation of columns in the films based on the dose of Na added during growth. A mechanism for the transition to growth of columns with critical concentrations of NaF is proposed.
- Graduation Semester
- 2016-08
- Type of Resource
- text
- Permalink
- http://hdl.handle.net/2142/92674
- Copyright and License Information
- Copyright 2016 Justin Kardel
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Graduate Dissertations and Theses at Illinois PRIMARY
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