Organic Dye Compound Using Triphenylamine with Bulky Substituent as Electron Donating Group, Semiconductor Thin Film Electrode, Photoelectric Conversion Device, and Photoelectrochemical Solar Cell Using the Same

摘要

An organic compound for a sensitized organic dye that has a large steric hindrance to improve the open-circuit voltage of a cobalt complex redox dye-sensitized solar cell and can easily expand a π-electron transfer site, and the organic compound It is an object of the present invention to provide a semiconductor thin film electrode, a photoelectric conversion element and the like using an organic dye as an organic dye, and the organic compound has a large steric hindrance and obstructs the proximity of cobalt complex redox to the titanium oxide surface. It is represented by the following general formula (1) having a donor structure based on a skeleton. Wherein L is an electron transporting linking group containing at least one heterocyclic ring selected from a thiophene ring, a furan ring, a pyrrole ring and the like, and R 1, R 2, R 3 and R 4 are each independently an alkyl group. A substituent bonded to at least one donor structure selected from a group, R5 is a substituent bonded to at least one electron transporting linking group selected from an alkyl group, etc., M is a hydrogen atom or salt Represents a forming cation, and n represents an integer of 1 to 6.)