Synthesis and Application of Two Organic Dyes Based on Indoline in Dye-Sensitized Solar Cells

In this paper we sensitized two new organic days dye 1 and dye 2 based on thioindigo with phenothiazine as the electron donor group. we used acrylic acid and cyanoacrylic acid as the electron acceptor anchoring group in dye 1 and dye 2 respectively. the proposed dyes were sensitized from phenothiazine as the starting material by standard reactions and characterized by different techniques such as melting point, ftir, 1hnmr, elemental analysis and uv-visible spectroscopy after purification. spectrophotometric measurements of the syntesised dyes in solution and on a tio2 substrate were carried out in order to assess changes in the status of the dyes. the wavelength of maximum absorption for dye1 and dye 2 in solution are 499 nm and 505 nm and on tio2 films are 523 nm and 527 nm, respectively. finally, the proposed dyes used as sensitizer in a dye solar cell structure and their photovoltaic properties investigated. the conversion efficiency for dye 1 and dye 2 are 2.34 and 3.07, respectively.