Performance Enhancement of Organic Solar Cells via Modification of the PAni-TiO2 Interface with Hydrogen Plasma Treatment
Recent Trends in Chemical and Material Sciences Vol. 8,
18 April 2022
Severe research efforts are still underway to improve the performance of polyaniline (PAni)-based photoactive layers, which are one of the cheapest materials used in the production of organic solar cells. Polymer solar cells were created using an ITO/(PAni-TiO2)/Au system. To improve the efficiency of the synthesised solar cells, the photoactive layers (PAni-TiO2) were treated with a hydrogen-plasma discharge for short periods of time (0, 3, and 5 minutes). The morphology, microstructure, and optical properties of prepared samples and plasma-treated nanocomposite layers were studied and discussed. Before and after plasma treatment, the performance of bulk heterojunction (BHJ) cell samples was extensively examined. After the PAni-TiO2 photoactive films have been treated, the absorption and optical band gap energy has increased. After 5 minutes of hydrogen plasma processing, the efficiency increased to 0.7 percent, compared to 0.36 percent for the pristine cell. The improvement in efficiency is attributed to a structural alteration that was accompanied by a rapid increase in surface roughness, which resulted in a reduction in reflected photons and, as a result, a rise in generated charge carriers.
- TiO2 nanoparticles (NPs)
- Polyaniline (PAni)
- hydrogen plasma
- BHJ solar cells