Fabrication of Organic Solar Cells based on Photosensitive Small Molecules and Study of Electron Acceptor Layer Effect on Efficiency

We have designed and synthesized an efficient and novel photosensitive two small organic molecules with different lengths of methine units, cyano groups as the electron acceptor units, and amino groups as the electron donor units.Compound 1 was synthesized from benzaldehyde, malononitrile and hydrazine hydrate and benzaldehyde whereas compound 2 was synthesized from benzaldehyde, Dimedone and hydrazine hydrate and their thermal, phovoltaic and surface properties were studied.Then these small molecules were utilized for development of organic solar cells in FTO: ZnO: Organic compound: Electrolyte: Pt electrode pattern.