Doped poly (o-phenylenediamine -co- p-toluidine) fibers for polymer solar cells applications

Hydrochloric acid doped Poly (o-phenylenediamine -co- p-toluidine) (PoPDApT) is synthesized at pH similar to 0.65, utilizing anhydrous FeCl3 using oxidative polymerization. The process of copolymerization is achieved in PEG200 as a soft template at room temperature. The polymerization method leads to the reduction of ferric chloride by both comonomers (o-phenylenediamine) and (p-toluidine). The obtained PoPDApT copolymer is soluble in chloroform and dimethylformamide solvents. The resulting PoPDApT copolymer fibers are examined by different techniques including scanning electron microscope (SEM), X-ray diffraction (XRD), proton nuclear magnetic resonance ((HNMR)-H-1), and Fourier transform infrared (FT-IR). The structures of quinoid and benzoid are present in the PoPDApT doped copolymer chains. Doped Poly (o-phenylenediamine -co- p-toluidine) thin film with thickness (175 +/- 5 nm) [PoPDApT](TF) is fabricated by utilizing SPIN150 spin coater with speed rate of 2000 rpm/30 sec. The surface roughness of the thin film is characterized by computing the roughness parameters, which are determined by analyzing the topography scans using Atomic Force Microscope (AFM). The optical properties of [PoPDApT](TF) are investigated. In addition, Au/n-[PoPDApT](TF)/p-Si/Al heterojunction solar cell is manufactured. The Current-Voltage characteristics of the Au/n-POPDAPT /p-Si/Al heterojunction device (of thickness 175 +/- 5 nm), under various illumination intensities within the range of 25 W/m(2) to 75 W/m(2,) are studied. The computed current increases powerfully, increasing the light intensity result from the generation of charge carriers. The power conversion efficiency (PCE) of Au/n-[PoPDApT]TF/p-Si/Al solar cell is computed as congruent to 6.17% at illumination intensities 75 W/m(2).