Infrared emitting PbSe nanocrystals for telecommunications window applications

We demonstrate the colloidal synthesis of PbSe nanocrystal quantum dots, via an organometallic-precursor route, developed from recently reported techniques. This synthesis typically yields a particle size distribution of approximately 5-10%, as may be inferred from the sharp spectral features seen i...

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Bibliographic Details
Published in:Journal of modern optics 2005-05, Vol.52 (7), p.955-964
Main Authors: Finlayson, C. E., Amezcua, A., Sazio, P. J. A., Walker, P. S., Grossel, M. C., Curry, R. J., Smith, D. C., Baumberg, J. J.
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Infrared transmitting materials
Optical materials
Optics
Physics
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Summary:We demonstrate the colloidal synthesis of PbSe nanocrystal quantum dots, via an organometallic-precursor route, developed from recently reported techniques. This synthesis typically yields a particle size distribution of approximately 5-10%, as may be inferred from the sharp spectral features seen in absorption and from our effective-mass model correlating spectral features to nanocrystal size. An accurate quantitative analysis, using an infrared reference dye, shows these nanocrystals to exhibit infrared photoluminescence from intrinsic quantum-confined states, with high quantum efficiencies of up to 60% in solution. The wavelength of the photoluminescence may also be conveniently size tuned in order to access the 1.3-1.5 µm 'telecommunications window'. We discuss the significance of this work in the context of future optoelectronic applications.
ISSN:0950-0340
1362-3044
DOI:10.1080/09500340512331327589