The invention discloses a dicarbazole
bipyridine compound as well as a preparation method and co-
sensitization application thereof, and the specific preparation process comprises the following steps: dissolving a compound as shown in a formula II and 4-pyridylboronic acid in a
solvent, adding an alkaline substance and a catalyst, carrying out heating
reflux reaction under stirring, and after the reaction is finished, carrying out post-treatment to obtain a compound as shown in a formula DSB-6; the preparation method comprises the following steps: dissolving 4-bromophenylpyridine, bis (pinacolato) diboron, PdCl2 (dppf) and
potassium acetate in 1, 4-dioxane, heating and refluxing, then adding a compound as shown in a formula II, an alkaline substance
aqueous solution and a catalyst, heating and refluxing to react while stirring, and after the reaction is finished, carrying out post-treatment to obtain a compound as shown in a formula DSB-7, and using the compound as a dye sensitizer to prepare the dye sensitizer. According to the preparation method disclosed by the invention, an
alkyl chain is connected with dicarbazole and
bipyridine, and benzothiadiazole or phenyl benzothiadiazole is introduced into
carbazole, so that the dicarbazole and
bipyridine compound is synthesized, and a new applicable substance is added for screening dye sensitizers.