Exploring Overall Photoelectric Applications by Organic Materials Containing Symmetric Donor Isomers

Organic thin-film solar cells have demonstrated a bright prospect for commercial applications, 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 donor cores, T1 and T2, which consist of fused thiophene triazatruxene, have been synthesized and applied in two different types of solar cells. The two-dimensional π-bonded extension enhances their electron-donating capability and induces relatively strong intermolecular π–π stacking. The C 3 h symmetrical donor isomers, featuring planar backbones and three-dimensional structures, are found to contribute toward a promising prospect for overall photoelectric applications.