TITLE

Optical properties of well-crystallized and size-tuned ZnO quantum dots

AUTHOR(S)
Suzuki, Keigo; Kondo, Hiroyuki; Inoguchi, Masashi; Tanaka, Nobuhiko; Kageyama, Keisuke; Takagi, Hiroshi
PUB. DATE
June 2009
SOURCE
Applied Physics Letters;6/1/2009, Vol. 94 Issue 22, p223103
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Well-crystallized and size-tuned ZnO quantum dots (QDs) were prepared by pulsed laser ablation and following size classification using a differential mobility analyzer. Photoluminescence (PL) spectra of the ZnO QDs showed predominant ultraviolet (UV) emission. The finely size-tuned ZnO QDs allowed us to precisely evaluate the quantum confinement effect, i.e., the size-driven color-tunable behavior in the UV emission range. The faint green luminescence found in the PL spectra and the low Stokes shifts of several tens meV demonstrated that the present QDs are almost free from defects. These features are quite favorable for use in future optoelectronic devices.
ACCESSION #
41139485

 

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