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Solid‐phase precipitation of CdTe nanoparticles in glass
Author(s) -
Yükselici M. H.,
Allahverdi Ç.
Publication year - 2003
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200301560
Subject(s) - nucleation , materials science , cadmium telluride photovoltaics , nanoparticle , precipitation , diffusion , absorption (acoustics) , dispersion (optics) , phase (matter) , activation energy , analytical chemistry (journal) , arrhenius equation , particle size , particle (ecology) , chemical engineering , chemical physics , thermodynamics , chemistry , nanotechnology , optics , composite material , chromatography , physics , oceanography , organic chemistry , engineering , geology , meteorology
Growth of CdTe nanoparticles in glass is studied through the analysis of optical absorption spectroscopy with the help of a quantized state effective mass model. Glass includes nanoparticles with an initial size of ∼1.6 nm on cooling to room temperature from the melt at ∼1000 °C. Particles form by heterogeneous nucleation followed by diffusion‐limited growth. The narrowest particle size dispersion of 15% is obtained for an average radius of ∼2.28 nm at the end of heat treatment at 600 °C for 4.5 h. The magnitude of the absorption related to the number of particles is low due to the oxidation of Te. A combinative use of Arrhenius plots and the model yields an activation energy for diffusion of ∼170 kJ mol –1 .
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