An estimate of shape-distribution of small CdS particles with luminescence spectra
Department of Semiconductor Electronics of Kyiv National Taras Shevchenko University, Glushkov ave.2, build. 5, Kyiv, 03028, Ukraine
Corresponding author: a email@example.com
Revised: 29 March 2007
Published online: 16 May 2007
The luminescence spectra of CdS particles obtained by sedimentation method are studied. The comparison of measured and calculated photoluminescence spectra was used as the base of the method defining the shape distribution of the particles. For this purpose one can use the symmetry rule for absorption and luminescence spectra. Absorption spectra were calculated via dissipative function in terms of local field theory. The experimental spectra of the photoluminescence were measured during the process of sedimentation in the CdS nano-composite powder. The modification of luminescence spectra detected during sedimentation time is associated with changing the dimension and shape distributions of CdS suspension. As a result, the particles shape distribution was estimated for sizes less then 1 μm.
PACS: 61.46.Df – Nanoparticles / 78.67.Bf – Nanocrystals and nanoparticles
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007