Formation of CdxHg1-xTe Layers on CdTe after NP-Etching and HgTe-Graphite Pasting


We report on our investigation of the microstructure and chemical composition at the CdTe/Te-rich interfaces generated by NP-etching polycrystalline and single-crystalline CdTe films and followed with HgTe-graphite pasting and thermal annealing. We find that after this process, a thin layer of CdxHg1-xTe forms between CdTe and Te-rich layers, giving a structure like CdTe/CdxHg1-xTe/Te. High-resolution electron microscopy reveals that the CdxHg1-xTe layer has an epitaxial relationship with the CdTe. No CdxHg1-xTe layer has been observed in bromine/methanol-etched samples or samples with intentionally deposited Te layers.

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  1. [1]

    H. Ohyama, et al., Proc. 26th IEEE Photovoltaic Specialists Conference (IEEE, New York, 1997), p. 343.

  2. [2]

    X. Wu, et al. Proc. 2001 NCPV Review Meeting, p. 47.

  3. [3]

    R.H. Williams, N. Forsyth, I.M. Dharmadasa, and Z. Sobiesierski, Appl. Surf. Sci. 41/41. 189 (1989).

    Google Scholar 

  4. [4]

    D. Rioux, D.W. Niles, and H. Hochst, J. Appl. Phys. 73, 8381 (1991).

    Article  Google Scholar 

  5. [5]

    H.S. White, A.J. Ricco, and M.S. Wrighton, J. Phys. Chem. 87 (1983) 5140.

    CAS  Article  Google Scholar 

  6. [6]

    A.J. Ricco, H.S. White, and M.S. Wrighton, J. Vac. Sci. Technol. A2 (1984) 910.

    CAS  Article  Google Scholar 

  7. [7]

    D. Niles, X. Li, and P. Sheldon, J. Appl. Phys. 77 (1995) 4489.

    CAS  Article  Google Scholar 

  8. [8]

    D. Albin, D. Levi, S. Asher, A. Balcioglu, R. Dhere, and J. Hiltner, Proc. of the 28th IEEE Photovoltaic Specialist Conference (IEEE, New York, 2000).

    Google Scholar 

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Correspondence to Yanfa Yan.

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Yan, Y., Jones, K.M., Wu, X. et al. Formation of CdxHg1-xTe Layers on CdTe after NP-Etching and HgTe-Graphite Pasting. MRS Online Proceedings Library 763, 32 (2002).

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