Phenanthro-carbazole donor-acceptor organic dye and application thereof in dye-sensitized solar cell

The invention provides a phenanthro-carbazole donor-acceptor organic dye and application thereof in a dye-sensitized solar cell, and belongs to the field of organic dyes. The organic dye utilizes the characteristics of phenanthro-carbazole structural units such as a large plane conjugated system and higher fluorescence quantum yield to be connected with the structural units with different electronic withdrawing abilities so as to realize step-by-step regulation and control to the dye molecular energy level; meanwhile, a molecular non-conjugated skeleton is connected with a long alkyl chain, so that the solubility of phenanthro-carbazole units is improved, the difficulty in molecular synthesis and device processing is reduced, and charge transfer among molecules caused by molecular aggregation is reduced; meanwhile, raw materials of phenanthro-carbazole compounds are abundant in source, low in price and easy to cut structurally.