NOVELTY - An optical functional material (1) is new.    USE - As sensitizing dye for photoelectric conversion material of photoelectric conversion electrode used for photoelectric conversion cell (all claimed), and for photoluminescence material, optical recording material, image forming material, photochromic material, electroluminescent material, photoconductive material, dichroism material, radical generating material, acid generating material, base generating material, luminous material, non-linear optics material, second-harmonic generating material, third-harmonic generating material, photosensitive material, near-infrared absorbent material, photochemical hole-burning material, optical sensing material, optical marking material, sensitization material for photochemical treatment, optical phase-transition recording material, optical sintering recording material, magneto optical recording material, photodynamic therapy dye, photocatalyst hydrolyzing sensitizing dye, and optical absorption material.    ADVANTAGE - The optical functional material has excellent stability, and exhibits photoelectric conversion function by broad wavelength region with respect to sunlight. The optical functional material does not use exhaustible raw material such as ruthenium, and creates efficient photoelectric conversion material. The photoelectric conversion cell comprising the optical functional material has high photoelectric conversion efficiency and durability.    DETAILED DESCRIPTION - An optical functional material is of formula (1).    A1,A2 = bivalent organic residue;    R1 = alkyl, alkenyl, aryl or heterocyclic ring optionally having substituent;    R2,R3 = H, alkyl, aryl or heterocyclic group optionally having substituent, and combines to form ring;    R4 = H, alkyl, alkoxy, aryl, heterocyclic or hetero atom; and    X = substituent having acidic group.    INDEPENDENT CLAIMS are also included for:    1. Photoelectric conversion electrode comprising (1); and    2. Photoelectric conversion cell.    DESCRIPTION OF DRAWING(S) - The figure shows the test sample of photoelectric-conversion cell.(Drawing includes non-English language text).    Titanium oxide porous layer (1)    Electrolytic solution layer (2)    Transparent electrode layer (3)    Platinum electrode layer (4)    Glass substrate (5)