Property of molecular beam epitaxy-grown ZnSe/GaAs

분자선 에피성장법으로 성장된 ZnSe/GaAs의 특성

  • 김은도 ((주)알파플러스 기술연구소) ;
  • 손영호 ((주)알파플러스 기술연구소) ;
  • 조성진 (경성대학교 물리학과) ;
  • 황도원 ((주)알파플러스 기술연구소)
  • Published : 2007.04.30

Abstract

We have installed an ultra high vacuum (UHV) molecular beam epitaxy (MBE) system and investigated into the characteristics of MBE-grown ZnSe/GaAs [001] using scanning electron microscopy (SEM), atomic force microscopy (AFM), we confirmed that layer's surface was dense and uniform of molecular layer. We used x-ray diffractometer (XRD) and confirmed two peaks correspond to GaAs [001] substrate and ZnSe epilayer, respectively. We observed photoluminescence (PL) peak approximately at 437 nm and measured PL mapping of 2 inch ZnSe epilayer.

본 연구에서는 초고진공(UHV, ultra high vacuum) 분자선 에피성장(MBE, molecular beam epitaxy) 시스템을 제작하여, ZnSe/GaAs[001]을 증착하였고, 증착된 박막의 특성을 SEM(scanning electron microscopy), AFM(atomic force microscopy)으로 조사하여, 분자층 단위의 조밀하고 균일한 표면특성을 보이고 있음을 확인할 수 있었다 XRD(x-ray diffractometer)를 이용하여, GaAs[001]기판의 XRD peak 위치와 ZnSe 박막의 XRD peak 위치가 각자 일치함을 확인할 수 있었다. PL(photoluminescence)로는 대략 437nm에서 발광하는 것이 관측되었으며, 2인치 ZnSe 박막의 PL mapping을 측정하였다.

Keywords

References

  1. S.H. Bae, S.R. In, K.H. Chung, Y.B. Lee and Y.H. Shin, 'Vacuum science' (Hankyung, Seoul, 2000) p. 681-695
  2. S.M. Chung, J.W. Lee and C.Y Park, 'Introductory Vacuum Science & Technology' (Cheong Moon Gak, Seoul, 2001) pp. 412-420
  3. S. Fujiwara, H. Morishita, T. Kotani, K. Matsumoto and T. Shirakawa, 'Growth of large ZnSe single crystal by CVT method', J. Cryst. Growth 186 (1998) 60 https://doi.org/10.1016/S0022-0248(97)00441-7
  4. T. Yamaguchi, K. Ando, K. Koizumi, H. Inozue, H. Ishikura, T. Abe and H. Kasada, 'Self-compensation of the phosphorous acceptor in ZnSe', J. Appl. Phys. 37 (1998) 1453 https://doi.org/10.1143/JJAP.37.1453
  5. K.J. Hong and S.N. Baek, 'Properties of photoluminecience for ZnSe/GaAs epilayer grown by hot wall epitaxy', J. K. Cryst. Growth and Cryst. Tech. 13 (2003) 105
  6. M.J. Kim, H.S. Lee, J.Y. Lee, T.W Kim, K.H. Yoo and M.D. Kim, 'Effect of thermal annealing on the surface, optical, and structural properties of p-type ZnSe thin films grown on GaAs (100) substrates', J. Mat. Sci. 39 (2004) 323 https://doi.org/10.1023/B:JMSC.0000007766.16695.29
  7. J.S. Song, J.H. Chang, S.K. Hong, M.W. Cho, H. Makino, T. Hanada and T. Yao, 'Improvement in crystallinity of ZnSe by inserting a low-temperature buffer layer between the ZnSe epilayer and the GaAs substrate', J.Cryst. Growth 242 (2002) 95 https://doi.org/10.1016/S0022-0248(02)01355-6