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Description
Title: | Growth of epitaxial nanoscale columnar copper indium diselinide thin films by introduction of sodium flouride during growth |
Author(s): | Kardel, Justin Tynes |
Advisor(s): | Rockett, Angus A. |
Department / Program: | Materials Science & Engineerng |
Discipline: | Materials Science & Engr |
Degree Granting Institution: | University of Illinois at Urbana-Champaign |
Degree: | M.S. |
Genre: | Thesis |
Subject(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. |
Issue Date: | 2016-07-27 |
Type: | Text |
URI: | http://hdl.handle.net/2142/92674 |
Rights Information: | Copyright 2016 Justin Kardel |
Date Available in IDEALS: | 2016-11-10 |
Date Deposited: | 2016-08 |
This item appears in the following Collection(s)
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Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois