CHOSUN

삼원 화합물 반도체의 온도 의존성에 관한 연구

Metadata Downloads
Author(s)
曺興鉉
Issued Date
2004
Abstract
In this paper, author describe the Zn₄GeSe_(6) and Zn₄GeSe_(6):Co^(2+) single crystal were grown by the chemical transport reaction method using iodine as a transporting. The structure of Zn₄GeSe_(6):Co^(2+) single crystal were monoclinic structure and lattice constant and electric conduction type of Zn₄GeSe_(6): single crystals was a=12.76Å, b=7.42Å, c=12.80Å, and β=108.02˚, respectively. Zn₄GeSe_(6):Co^(2+) single crystals had tetragonal structure and lattice constant was a=12.72Å, b=7.46Å, c=12.76Å, and β=108.02˚. The direct band gap of Zn₄GeSe_(6) and Zn₄GeSe_(6):Co^(2+) single crystals obtained from optical absorption spectrum were 2.451eV or 2.166eV at 290K. The temperature dependence of the optical energy gap is well presented by the Varshni equation. Also, the entropy, enthalpy and heat capacity were deduced from the temperature dependence of optical energy gap.
The impurity optical absorption properties due to the cobalt dopant were investigated. The impurity optical absorption peaks due to the cobalt dopant in the Zn₄GeSe_(6):Co^(2+) single crystal are assigned to the electron transitions among the energy levels of the Co^(2+) ion sited at the T_(d) symmetry point in the host materials Zn₄GeSe_(6) single crystals.
Alternative Title
A Study on Temperature Dependence of Ternary Compound Semiconductor
Alternative Author(s)
Cho, Heung Hyeon
Affiliation
朝鮮大學校 産業大學院
Department
산업대학원 전기공학과
Advisor
吳金坤
Awarded Date
2005. 2
Table Of Contents
目次
List of figures = ⅰ
List of table = ⅳ
ABSTRACT = ⅴ
Ⅰ. 서론 = 1
Ⅱ. 이론 = 2
2-1. 반도체의 광흡수 이론 = 2
2-2. 결정장 내의 Co^(2+) 이온의 에너지 준위 = 6
Ⅲ. 실험 = 16
3-1. 단결정 성장 = 16
3-2. 성장된 단결정의 조성 및 구조 분석 = 17
3-3. 성장된 단결정의 광흡수 측정 = 19
Ⅳ. 실험 결과 = 21
4-1. 단결정의 결정구조 = 21
4-2. 단결정의 광흡수 특성 = 23
4-3. 에너지 갭의 온도의존성 = 25
4-4. 에너지 띠의 온도의존성으로부터 열역학적 함수 = 27
4-5. Zn₄GeSe_(6):Co^(2+) 단결정에서 Co^(2+) 불순물의 광흡수 특성 = 31
Ⅴ. 결론 = 37
참고 문헌 = 38
Degree
Master
Publisher
朝鮮大學校 産業大學院
Citation
曺興鉉. (2004). 삼원 화합물 반도체의 온도 의존성에 관한 연구
Type
Dissertation
URI
https://oak.chosun.ac.kr/handle/2020.oak/1881
Appears in Collections:
Engineering > Theses(Master)(산업기술창업대학원)
Authorize & License
  • AuthorizeOpen
Files in This Item:
  • There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.