한국전기전자재료학회논문지 (Journal of the Korean Institute of Electrical and Electronic Material Engineers)

  • 제11권9호
  • /
  • Pages.693-699
  • /
  • 1998
  • /
  • 1226-7945(pISSN)
  • /
  • 2288-3258(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
권호 표지

Cobalt를 첨가한 $Cd_4GeS_6$ 단결정에서 Energy Gap의 온도의존성 및 열역학적 함수 추정

Temperature Dependence of Energy Gap and Thermodynamic Function Properties of Coblt-doped $Cd_4GeS_6$Single Crystals

  • 김덕태 (동아인제대학교 전기전자계열)
  • 발행 : 1998.09.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

In this work $Cd_4GeS_6:Co^{2+}$(0.5mole%) single crystals were grown by the chemical transporting reactiov(CTR) method using high purity(6N) elements. The grown single crystals crystallized in a monoclinic structure(space group Cc). The direct optical energy gap of this single crystals was found to be 2.445eV at 300K and the temperature dependence of optical energy gap was fitted well to Varshni equation. But at temperatures lower than 70K an anomalous temperature dependence of the optical energy gap was obtained. This anomalous temperature dependence accored well with the anomalous temperature dependence of the unit cell volume. Also, the entropy, enthalpy and heat capacity were deduced from the temperature dependence of optical energy gaps.

키워드

참고문헌

  1. Acta Cryst no.C51 Redetermination de la Structure du Sulfure de Cadmium et de Germanium $Cd_4GeS_6$ Julien-Pouzol, M.;Jaulmes, S.
  2. Korean Phy. Soc. v.9 Chalcopyrite Semiconductors as New Optoelectronics Materials K. Sato
  3. J. Electro. Chem. Soc. v.114 no.10 $Cd_4SiS_6$ and $Cd_4SiSe_6$, New Ternary Compounds Kaldis, E.(et al.)
  4. Oyo Buturi no.40;41 Optical properties of $Cd_4SiS_6$ Nitta, M.;Kawashima, H.;Haradome, M.
  5. Phys. Status Solidi(a) no.127 Photoluminescence Study on $Cd_4GeSe_6$ Kim, D. T.(et al.)
  6. J. Mat. Sci. Lett. no.12 Optical Absorption Spectra of Undoped anhd Co-doped $Cd_4GeSe_6$ Single Crystals Kim, D. T.
  7. Bulle. of Kor. Phys. Soc. v.14 no.3 Optical properties of Undoped and Co-doped $Zn_4GeSe_6$ Single Crystals Kim, D. T.
  8. Optical Processes in Semicon Pankove, J. J.
  9. Proc. of ICTMC 11 Optical properties of $Cd_4GeS_6\;and\;Cd_4GeS_6Co^{2+}$ Single Crystals D.T. Kim
  10. Bulle. of Kor. Phys. Soc. v.15-2 Ka-Po55 optical properties of $Cd_4GeS_6\;and\;Cd_4GeS_6Co^{2+}$ Single Crystals D.T. Kim
  11. Physica no.34 Temperature Dependence of the Energy Gap in Semiconductors Varshni, Y. P.
  12. 새물리 v.31 $Cd_4GeSe_6$ 단결정의 광학적특성에 관한 연구 김덕태;유기수
  13. Photoconductivity of Solides Bube, R. H.
  14. Solid State Comm. no.13 Anomalous temperature dependence of the energy gap of AgGaS₂ Yu, P. W.;Anderson, W. J.;Park, Y. S.
  15. Energy Band in Semiconductors D. Long
  16. Photoconductivity of Solides R. H. Bube
  17. J. Electrochem. Soc., Solid-State Sci. and Tec. no.122 The Standard Thermodynamic Functions for the Formation of Electrons and holes in Ge, Si, GaAs, and Gap Thurmond, C. D.
  18. C. R. Acad. Sc. Paris. no.268 Etude du systeme GeSe₂-CdSe Identification du compose $Cd_4GeSe_6$ Quenez, P.(et al.)
  19. Proc. of ICTMC 11 Salford. Optical properties of $Cd_4GeSe_6$ and$ Cd_4GeS_6$ : $Co^{2+}$ Single Crystals Kim, D. T.
  20. Bulle. of Kor. Phys. Soc. v.15 no.2 Optical properties of $Cd_4GeS_6$ and $Cd_4GeS_6$ : $Co^{2+}$ Single Crystals Kim, D. T.