Masters Theses

Yaou Song

Abstract

"Transparent conductive oxides (TCOs) such as doped In₂O₃, ZnO, SnO₂ or CdO are highly attractive due to their special properties, which are electrical conductivity and optical transparency. The lack of complete understanding of the fundamentals behind this unique phenomena and rapidly increasing commercial demand draw a lot of interest in investigating this kind of materials. More efficient, environmentally friendly and less expensive transparent conductive materials are needed for a variety of applications, and a general understanding of the origins of the unusual behavior would help further search for potential transparent conductive (TC) candidates. Understanding the basic properties of conventional TCOs theory and predicting new TC candidates are the two main goals of this study. To achieve these goals, several classes of materials including conventional TCOs and other metal oxides, nitrides, selenides, sulfides, fluorides and a few others were investigated by using first-principles electronic band structure simulations. Compounds with same-group next-period cations or anions are studied. For example, vertical chains of compounds Al₂O₃ -> Ga₂O₃ -> In₂O₃ -> Tl₂O₃, and In₂O₃ -> In₂S₃ -> In₂Se₃ -> In₂Te₃, were systematically considered. The results comprise electronic band structure, band gap, density of states, electron effective mass and holes effective mass. The calculated materials were separated into different groups based on the location of the cation or anion in the periodic table, i.e., on its electronic configuration or atomic weight, and comparisons were carried out within the same group. The differences among the compounds in the same series are discussed in details based on the calculated results"--Abstract, page iii.

Advisor(s)

Medvedeva, Julia E.

Committee Member(s)

Parris, Paul Ernest, 1954-
Hor, Yew San

Department(s)

Physics

Degree Name

M.S. in Physics

Publisher

Missouri University of Science and Technology

Publication Date

2011

Pagination

viii, 79 pages

Note about bibliography

Includes bibliographical references (pages 152-159).

Rights

© 2011 Yaou Song, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Metal oxide semiconductorsOxides -- Electric properties -- AnalysisElectric conductivity

Thesis Number

T 10219

Print OCLC #

862733651

Electronic OCLC #

862733662

Download

Included in

Physics Commons

Share

 
COinS