Affiliation: | (1) Institute of Inorganic Chemistry, Semiconductor Chemistry group, University of Lepzig, Linnéstrasse 3, 04103 Leipzig, Germany;(2) Department of Microelectronics, Slovak Technical University, Ilkovicova 3, SK 81219 Bratislava, Slovakia;(3) International Laser Center, Ilkovicova 3, SK 81219 Bratislava, Slovakia;(4) Institute of Experimental Physics II, Semiconductor Physics group, University of Leipzig, Linnéstrasse 3, 04103 Leipzig, Germany;(5) Department of Physics, University of Žilina, Vel’ky diel, SK 01026 Žilina, Slovakia |