Exploring Overall Photoelectric Applications by Organic Materials Containing Symmetric Donor Isomers

Organic thin film solar cells have demonstrated a bright prospect for commercial application, where organic photosensitizers act as the most important kernel. In the global motif of sustainable development, unrelenting research efforts have been devoted to the exploration of organic material containing photosensitizers to achieve low-cost conversion of solar energy to clean electricity. In this work, two star-shaped polycyclic aromatic hydrocarbons (PAHs), T1 and T2, which consist of fused thiophene triazatruxene, have been synthesized and applied in two different type solar cells. The two-dimensional π-bonded extension enhances their electron-donating capability and induces relatively strong intermolecular π−π stacking. The C3h symmetrical donor isomers, featuring planar backbones and three-dimensional structures, are found to contribute to promising prospect for overall photoelectric applications.