Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Optical Properties of Undoped and Co2+ Doped CaGa2(S,Se)4 and Caln2(S,Se)4 Single Crystals

$CaGa_{2}(S,Se)_{4}:Co^{2+}$ 및 $Caln_{2}(S,Se)_{4}:Co^{2+}$ 단결정의 광학적 특성

  • 김형곤 (조선이공대학 전기과) ;
  • 김남오 (조선이공대학 전기과) ;
  • 김덕태 (동아인제대학 예체능공학부) ;
  • 헌승철 (성화대학 안경광학과) ;
  • 방태환 (성화대학 전기제어계측과)
  • Published : 2004.11.19
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Abstract

Undoped and $Co^{2+}$-doped $CaGa_2S_4$, $CaGa_2Se_4$, $CaIn_2S_4$. and $CaIn_2Se_4$ single crystals were grown by using the chemical transport reaction method The temperature dependence of the optical energy gap was well fitted by the Varshni equation. In the Co2+ - doped $CaGa_2S_4$, $CaGa_2Se_4$, $CaIn_2S_4$, and $CaIn_2Se_4$ single crystals, two groups of impurity optical absorption peaks due to Co2+ sited in a Td symmetry were observed in the wavelength regions of 600 900 nm and 1350 1950 nm at 11 K.耀

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