Methods of preparing a multi-shell nanocrystal structure, multi-shell nanocrystal structures and fabricated device including the same

#This non-provisional application claims the benefit of priority under 35 U.S.C. § 119 from Korean Patent Application No. 2005-84554, filed on Sep. 12, 2005, in the Korean Intellectual Property Office (KIPO), the disclosure of which is herein by reference in its entirety.

#1. Field of the Invention

#Example embodiments of the present invention relate to methods for forming a multi-shell nanocrystal structure, multi-shell nanocrystal structures and a method for fabricating a device including the same. Other example embodiments of the present invention relate to methods for forming a multi-shell nanocrystal structure by preparing a core nanocrystal and simultaneously using at least two precursors having different reaction rates to sequentially form at least two shell layers of nanocrystals having different compositions on a surface of the core nanocrystal, multi-shell nanocrystal structures and fabricated device including the same.

#Example embodiments of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings. FIGS. 1-12 represent non-limiting, example embodiments of the present invention as described herewithin.

#FIGS. 1 and 2 are schematic diagrams illustrating methods for forming a nanocrystal structure according to example embodiments of the present invention;

#FIGS. 3 thru 6 are schematic diagrams illustrating bandgaps of a nanocrystal structure according to example embodiments of the present invention;

#Various example embodiments of the present invention will now be described more fully with reference to the accompanying drawings in which some example embodiments of the invention are shown. In the drawings, the thicknesses of layers and regions may be exaggerated for clarity. Detailed illustrative embodiments of the present invention are disclosed herein. However, specific structural and functional details disclosed herein are merely representative for purposes of describing example embodiments of the present invention. This invention may, however, may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

#Accordingly, while example embodiments of the invention are capable of various modifications and alternative forms, embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that there is no intent to limit example embodiments of the invention to the particular forms disclosed, but on the contrary, example embodiments of the invention are to cover all modifications, equivalents, and alternatives falling within the scope of the invention. Like numbers refer to like elements throughout the description of the figures.

#It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.