On the origin of visible photoluminescence in nanometer-size Ge crystallites
- Kanemitsu Yoshihiko
- Uto Hiroshi
- Masumoto Yasuaki
- Maeda Yoshihito
- 舛本 泰章
Publication date
November 1992
DOI Publisher
AIP Publishing ISSN
0003-6951 Journal
Applied Physics Letters Citation count (estimate)
187Abstract
We have studied the origin of visible photoluminescence of Ge nanocrystals in SiOZ glassymatrix. Spectroscopic analyses of Ge nanocrystals indicate that the room-temperaturephotoluminescence comes from Ge nanocrystals of diameter of 4 nm or less. High-resolutionelectron microscopic studies imply that the structure of Ge nanocrystals of diameter <4 nmdiffers from the diamond structure. These data suggest that new nanostructure crystalline Gehaving a character of direct optical transition exhibits the visible photoluminescence
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