[1] Institute of Materials Engineering, College of Natural Science, University of Rzeszow, 1 Pigonia St., Rzeszow,35-317, Poland
[2] Institute of Physics, College of Natural Sciences, University of Rzeszow, 1 Pigonia St., Rzeszow,35-317, Poland
[3] Department of Semiconductor and Optoelectronic Devices, Lodz University of Technology, Wólczanska 211/215, Lodz,90-924, Poland