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Mercury-Telluride Nanocrystalline Thin Films: A Unique Photoluminescence in the Visible Regime

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Abstract:

Stoichiometric mercury-telluride (HgTe) nanocrystals, free from any foreign impurities, have been prepared by an electrochemical technique. Transmission electron microscopy and selected area diffraction studies confirm that the size of HgTe nanocrystals with cubic phase range from 4 – 7 nm and are preferentially oriented. Optical absorption studies indicate that the band gap of HgTe nanocrystals is 2.14 eV. Room temperature photoluminescence measurements show band edge and trap dominated luminescence in the visible regime. Micro-Raman scattering analysis of the HgTe nanocrystals sample reveals the 1LO Raman vibrational mode is at 142.5 cm-1suggesting a shift of 6 cm-1 from it’s bulk value and confirms the crystalline size to be small.

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Periodical:

Journal of Metastable and Nanocrystalline Materials (Volume 23)

Pages:

125-128

DOI:

https://doi.org/10.4028/www.scientific.net/JMNM.23.125

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Online since:

January 2005

Authors:

S. Rath, S.N. Sahu

Keywords:

Mercury-Telluride, Nanocrystal, Size Quantization Effect, Visible Photoluminescence

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] D. Long and J. L. Schmit, Semiconductor and Semimetals, Academic press, 5 (1970) p.190.

Google Scholar

[2] T. C. McGill and D. A. Collins, Semicond. Sci. Technol., 8 (1993) S1.

Google Scholar

[3] A. Rogach, S. Kershaw, M. Burt, M. Harrison, A. Kornowski, A. Eychmuller and H. Weller, Adv. Mater, 11 (1999) 552.

Google Scholar

[4] S. N. Sahu, M. J. Antonio and C. Sanchez, Solar Energy Materials and Solar Cells, 43 (1996) 223.

Google Scholar

[5] K. K. Nanda, S. N. Sarangi, S. Mohanty and S. N. Sahu, Thin Solid Film, 322 (1998) 21.

Google Scholar

[6] L. E. Brus, J. Chem. Phys., 80 (1984) 4403.

Google Scholar

[7] B. K. Patel, R. Mythili, M. Vijayalaxmi, R. K. Soni, S. N. Behera and S. N. Sahu, Physica B, 322 (2002) 416.

Google Scholar