Optical,photoelectric and electric properties of single-crystalline Sb2Se3 |
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Authors: | F Kosek J Tulka L Štourač |
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Institution: | (1) University of Chemical Technology, Pardubice, Leninovo nám. 565, 532 10 Pardubice, Czechoslovakia;(2) Institute of Solid State Physics, Czechosl. Acad. Sci., Prague, Cukrovarnická 10, 162 53 Praha 6, Czechoslovakia |
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Abstract: | Measurements of absorption coefficient in the region of the absorption edge, of spectral distribution of photoconductivity and dependence of electrical conductivity upon temperature on Sb2Se3 single crystals are given. The absorption of light was proved to correspond to indirect forbidden transitions. The value of optical gapE
g
opt
=(1·11±0·02) eV forE a andE c was determined. From photoconductivity and conductivity measurements the values of the gaps areE
g
opt
=1·11 eV andE
g
el
=1·04 eV. The anisotropy of the electrical conductivity parallel and perpendicular to the cleavage plane is 2·2. |
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Keywords: | |
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