A new class of organic dyes based on acenaphthopyrazine for dye-sensitized solar cells

A new class of organic dyes based on acenaphthopyrazine derivatives, containing pyrazine group as the electron acceptor and o-dicarboxyl acids as the anchoring groups were designed and synthesized for application in dye-sensitized solar cells (DSCs). These dyes have short synthesis routes and are easily adsorbed on the surface of TiO 2. Under illumination of simulated AM1.5 solar light (100 mW cm −2), a total solar energy conversion efficiency ( η) of 4.04% was obtained for the 3-(diphenylamino)acenaphtho[1,2- b] pyrazine-8,9-dicarboxylic acid ( AP-1) in the preliminary tests, in comparison with the conventional N719 dye ( η = 7.05%) under the same conditions.