ZnPc PHTHALOCYANINE THIN FILMS OBTAINED BY DROP CASTING METHOD FROM CHEMICAL SOLUTION USED IN ORGANIC SOLAR CELLS

Vadim FURTUNĂ, Ștefan ROBU, Galina DRAGALINA, Ana POPUȘOI, Tamara POTLOG Universitatea de Stat din Moldova

Аннотация

This paper presents for a first time a solution-processable ZnPc thin films from formic acid (FA) solution by drop casting method and the photovoltaic parameters of the Organic Solar Cells (OPV) based on ZnPc-diode Schottky. Structural and optical properties of ZnPc thin films were investigated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and UV-VIS spectroscopy. XRD analysis show phase transformation of the alpha-beta phases of ZnPc thin films to beta phase due to the annealing in H2 atmosphere at 400oC for 30 min. FTIR analysis show that the formate ion (HCOO− ) is attached to Zn(II)Pc. Further on, the prepared ITO/PEDOT: PSS/ZnPc(I2)/Al Schottky photovoltaic devices show an efficiency of 0.3 %. The study of the current density at the illumination of 100 mW//cm2 indicates the (8.2 µA/cm2 ) which are higher than in the case of Schottky diode devices obtained by thermal vacuum evaporation. Keywords: drop casting method, zinc phthalocyanine, formic acid, thin films, organic solar cells.