1. Faculty of ChemistryUniversity of Wroclaw Wroclaw 50-383 Poland
2. Institute of PhysicsKazimierz Wielki University in Bydgoszcz Powstańców Wielkopolskich str., 2 Bydgoszcz 85090 Poland
3. Institute of Materials for Energy and Electronic TechnologyUniversity of Erlangen-Nuremberg Erlangen 91058 Germany