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Electrical and infrared optical properties of CdIn 2 S 4 single crystals grown by chemical transport
Author(s) -
Neumann H.,
Kissinger W.,
Lévy F.,
Sobotta H.,
Riede V.
Publication year - 1989
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170241114
Subject(s) - annealing (glass) , infrared , analytical chemistry (journal) , scattering , chemistry , atmospheric temperature range , infrared spectroscopy , electron , absorption (acoustics) , materials science , optics , physics , organic chemistry , composite material , chromatography , quantum mechanics , meteorology
Abstract Single crystals of CdIn 2 S 4 were grown by chemical transport with iodine as transporting agent using different transporter concentrations and temperature gradients. It is found that the electron concentration increases with increasing transporter concentration and decreases after annealing in a sulphur atmosphere. Infrared reflectivity and absorption spectra are measured at room temperature in the wavenumber range from 180 to 4000 cm −1 in order to determine the optical mode parameters of the compound and to evaluate the scattering mechanism of the electrons from the free carrier absorption. Lattice scattering is found to be predominant at room temperature for electron concentrations below about 4 · 10 17 cm −3 .