Synthesis and electrochemical properties of TPBDTT conducting polymer for use in solar cells

In this study, TPBDTT conductive polymer, which plays a significant role in renewable energy sources, was synthesized and its electrochemical properties were investigated. Conductive polymers are known for their high conductivity, optical tunability, and stability due to their conjugated double bond structures and doping processes. TPBDTT polymer was synthesized using thieno [3,4-c]pirol-4,6-dion and benzodithiophenemonomers through the Stille polycondensation method. The synthesized polymer was purified using Soxhlet extraction and characterized. The electrochemical properties of the polymer were analyzed using cyclic voltammetry (CV) in an ACN/TBAPF6 solution with a three-electrode system. The HOMO and LUMO energy levels and redox potentials were determined, providing important insights into its thermal and chemical stability. Spectroelectrochemical analysis was conducted using UV-VIS-NIR spectroscopy to examine the polymer's absorption characteristics in both neutral and oxidized states. Optical band gaps, polaron, and bipolar on formation were also analyzed. Electochromic contrast studies showed that thepolymer's transmittance values were 12% at 537 nm, 20% at 760 nm, and 20% at 1830 nm. TPBDTT polymer, with its low-costproduction, stable optoelectronic properties, and good conductivity, holds promise for a wide range of applications, including organic solar cells, electrochromic devices, and biosensors. This study aims to contribute to the development of organic solar cells in the field of renewable energy.