M Szałajko and M Nowak 2007 J. Phys.: Condens. Matter 19 196210 doi:10.1088/0953-8984/19/19/196210
Quantum efficiency coefficient for photogeneration of carriers in gallium sulphide single crystals
M Szałajko1 and M Nowak
Show affiliationsThis paper presents investigations of the quantum efficiency coefficient for the photogeneration of carriers in gallium sulphide (GaS) single crystals. Therefore the spectral dependences (between 420 and 550 nm) of photoconductivity (σPC) were measured for temperatures from 80 to 333 K and for different light intensities. Since σPC depends on the absorption and reflection coefficients, these parameters were determined in the same range of temperatures. The least-squares method was applied to fit the experimental σPC data with appropriate theoretical dependence. From this fitting, spectral dependences of quantum efficiency coefficients for different temperatures and different light intensities were obtained. A comparison of the values of absorption coefficient obtained from the measurements of optical transmittance and from evaluation of the quantum efficiency coefficient is presented.
- PACS
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72.40.+w Photoconduction and photovoltaic effects
72.80.Jc Other crystalline inorganic semiconductors
72.20.Jv Charge carriers: generation, recombination, lifetime, and trapping
- Subjects
- Dates
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Issue 19 (16 May 2007)
Received 13 December 2006, in final form 14 December 2006
Published 19 April 2007
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Quantum efficiency coefficient for photogeneration of carriers in gallium sulphide single crystals
M Szałajko and M Nowak 2007 J. Phys.: Condens. Matter 19 196210
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