Physics 版 (精华区)
发信人: zjliu (秋天的萝卜), 信区: Physics
标 题: CdSe纳米晶粒固体的n型电导
发信站: 哈工大紫丁香 (Sat May 24 13:39:18 2003) , 转信
发信站: 瀚海星云
http://www.sciencemag.org/cgi/content/abstract/300/5623/1277
n-Type Conducting CdSe Nanocrystal Solids
Dong Yu, Congjun Wang, Philippe Guyot-Sionnest*
A bottleneck limiting the widespread application of semiconductor
nanocrystal solids is their poor conductivity. We report that the
conductivity of thin films of n-type CdSe nanocrystals increases by many
orders of magnitude as the occupation of the first two electronic shells,
1Se and 1Pe, increases, either by potassium or electrochemical doping.
Around half-filling of the 1Se shell, a peak in the conductivity is
observed, indicating shell-to-shell transport. Introducing conjugated
ligands between nanocrystals increases the conductivities of these states
to 10–2 siemens per centimeter.
James Franck Institute, University of Chicago, 5640 South Ellis Avenue,
Chicago, IL 60637, USA.
* To whom correspondence should be addressed. E-mail: pgs@uchicago.edu
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