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Spectral properties of CdSSe nanocrystals in glass
Author(s) -
Yinshu Wang,
Gao Xing-Guo,
Liancheng Zhao,
Yanzhen Wang,
Ruo-Zhen Wang
Publication year - 2004
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.53.2775
Subject(s) - nanocrystal , photoluminescence , materials science , absorption spectroscopy , annealing (glass) , quantum dot , spectral line , absorption (acoustics) , nanotechnology , optoelectronics , optics , physics , astronomy , composite material
CdS0.13Se0.87 nanocrystals of different sizes were grown by annealing glass contained Cd,Se and S at 650—800℃ for 4?h. The absorption spectra, photoluminescence spectra and electroabsorption spectra of the nanocrystals were measured. The energy of part of the electronic states was determined. Dependence of the optical properties of nanocrystals on their size was discussed. With the increase of nanocrystal size, the absorption, photoluminescence and eletroabsorption shifted red due to the weakening of quantum size Stark effects. The electroabsorption of small nanocrystals was due to the quantumconfined Stark effects whereas the electroabsorption line shape of larger nanocrystals was similar to that of bulk materials. With the increase of nanocrystal size, the electroabsor ption is enhanced. All nanocrystals have the third\|order optical susceptibility.

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