A Low-Temperature Synthesis for Organically Soluble HgTe Nanocrystals Exhibiting Near-Infrared Photoluminescence and Quantum Confinement

A new low-temperature, one-pot method is introduced for the preparation of organically passivated HgTe nanocrystals, without the use of highly toxic precursors. The nanocrystals show bright photoluminescence in the infrared telecommunication windows about 1300 and 1550 nm with quantum efficiencies b...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2006-05, Vol.128 (21), p.7087-7090
Main Authors: Piepenbrock, Marc-Oliver M, Stirner, Tom, Kelly, Stephen M, O'Neill, Mary
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
Physics
Quantum dots
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Summary:A new low-temperature, one-pot method is introduced for the preparation of organically passivated HgTe nanocrystals, without the use of highly toxic precursors. The nanocrystals show bright photoluminescence in the infrared telecommunication windows about 1300 and 1550 nm with quantum efficiencies between 55 and 60%. They have a zinc blende structure with a mean particle diameter of 3.4 nm, thus exhibiting quantum confinement effects. Particle growth is self-limited by temperature quenching, so a narrow size distribution is obtained. The measured size of the particles agrees with calculations using the pseudopotential method.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja060721j