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Humboldt-Universität zu Berlin - Mathematisch-Naturwissen­schaft­liche Fakultät - Nanooptik

Humboldt-Universität zu Berlin | Mathematisch-Naturwissen­schaft­liche Fakultät | Institut für Physik | Nanooptik | Publications | Highly Emissive Colloidal CdSe/CdS Heterostructures of Mixed Dimensionality

Dmitri V Talapin, Robert Koeppe, Stephan Götzinger, Andreas Kornowski, John M Lupton, Andrey L Rogach, Oliver Benson, Jochen Feldmann, and Horst Weller (2003)

Highly Emissive Colloidal CdSe/CdS Heterostructures of Mixed Dimensionality

Nano Letters, 3(12):1677-1681.

We demonstrate that efficient shape control may be achieved in the shell of colloidally grown semiconductor nanocrystals (independent of the core), allowing the combination of a 0-D spherical CdSe core with a 1-D rodlike CdS shell. Besides exhibiting linearly polarized emission with a room-temperature quantum efficiency above 70%, these mixed-dimensionality colloidal heterostructures display large, length-dependent Stokes shifts as well as giant extinction coefficients approaching 107cm-1 M-1.