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The Calculation of the Energy Band Gaps and Optical Constants of Zincblende InyGa1-yAs1-xNx on Composition

조성비 변화에 따른 질화물계 화합물 반도체 InyGa1-yAs1-xNx의 에너지 밴드갭과 광학상수 계산

  • Chung, Ho-Yong ;
  • Kim, Dae-Ik (School of Electrical, Electronic Communication, and Computer Engineering, Chonnam National University)
  • 정호용 (전남대학교 의공학과) ;
  • 김대익 (전남대학교 전기전자통신컴퓨터공학부)
  • Received : 2019.09.05
  • Accepted : 2019.10.15
  • Published : 2019.10.31

Abstract

The energy band gaps and optical constants of zincblende $In_yGa_{1-y}As_{1-x}N_x$ on the variation of temperature and composition are determined by using band anticrossing method. The energy band gaps are decreasing continuously in $In_yGa_{1-y}As_{1-x}N_x$ ($0{\leq}x{\leq}0.05$, $0{\leq}y{\leq}1.0$, 300K) and the bowing parameter is calculated as 0.522eV. The calculation results of energy band gaps are consistent with those of other studies. A refractive index n and a high-frequency dielectric constant ${\varepsilon}$ are calculated by a proposed modeling equation using the results of energy band gaps.

본 연구에서는 band anticrossing 모델을 사용하여 온도와 조성비 변화에 따른 4원계 질화물계 화합물 반도체 $In_yGa_{1-y}As_{1-x}N_x$의 에너지 밴드갭과 광학상수를 계산하였다. 300K의 조성비 구간($0{\leq}x{\leq}0.05$, $0{\leq}y{\leq}1.0$)에서 에너지 밴드갭들이 연속적으로 감소하며, 계산된 휨 매개변수는 0.522eV가 사용되었다. 에너지 밴드갭 계산 결과는 다른 연구 결과와 대체로 잘 일치하였다. 또한 에너지 밴드갭 결과를 새롭게 제안한 모델식에 적용하여 굴절률 n과 고주파 유전상수 ${\varepsilon}$를 계산하였다.

Keywords

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