Two-dimensional extended π-conjugated anthracene-based molecules bearing 4-ethynyl-7-(5-hexylthiophen-2-yl)benzo[c][1,2,5]thiadiazole at 2,6- and 9,10-substitution positions

► Novel thiophenylbenzothiadiazole-containing conjugated molecules have been synthesized. ► The two π-conjugated molecules exhibited fairly high charge carrier mobilities. ► The photovoltaic cell with these molecules exhibited a power conversion efficiency of 0.55%.