On the origin of visible photoluminescence in nanometer-size Ge crystallites | Zendy

Yoshihiko Kanemitsu | Zendy; Hiroshi Uto | Zendy; Yasuaki Masumoto | Zendy; Yoshihito Maeda | Zendy

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On the origin of visible photoluminescence in nanometer-size Ge crystallites

Author(s) -

Yoshihiko Kanemitsu,

Hiroshi Uto,

Yasuaki Masumoto,

Yoshihito Maeda

Publication year - 1992

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.108290

Subject(s) - photoluminescence , nanocrystal , materials science , crystallite , nanostructure , nanometre , germanium , diamond , nanotechnology , optoelectronics , silicon , composite material , metallurgy

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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