Synthesis and characterization of disc-shaped thiophene based Zn-Porphyrin for organic solar cells application

Disc-shaped thiophene donor based Zn-porphyrin complex is designed and synthesized by Alder’s two step method for organic solar cells application. The theoretical analysis is used to study the HOMO-LUMO and band gap energies. The synthesized porphyrin (THPY) and Zn-porphyrin complex (THPY-Zn) were characterized by Ultra Violet-Visible (UV-Visible), photoluminescence (PL), Fourier Transform Infra-Red (FTIR) spectroscopic methods. The experimental Highest Occupied Molecular Orbital (HOMO) and Lowest Unoccupied Molecular Orbital (LUMO) energies are analyzed by Cyclic Voltammetry (CV) and it is compared with theoretical HOMO and LUMO energies. THPY-Zn has red shifted absorption spectrum than corresponding THPY compound because of metallization. The synthesized THPY and THPY-Zn complex have strong absorption at visible region. The electronic and optical properties of the synthesized disc shaped porphyrin and Zn-porphyrin complex are investigated for organic solar cells application.