[1] Vilnius Univ, Inst Chem Phys, Sauletekio Ave 9, LT-10222 Vilnius, Lithuania
[2] Kaunas Univ Technol, Dept Organ Chem, Radvilenu Pl 19, LT-50254 Kaunas, Lithuania
[3] Ctr Phys Sci & Technol, Dept Mol Cpd Phys, Sauletekio Ave 3, LT-10257 Vilnius, Lithuania
[4] Helmholtz Zentrum Berlin Mat & Energie GmbH, Solar Energy Div, D-12489 Berlin, Germany
[5] Ctr Phys Sci & Technol, Dept Organ Chem, Sauletekio Ave 3, LT-10257 Vilnius, Lithuania