TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation: No general preparation is given. Preferred Composition: The pigment (I) is of formula (III)-(VI). The pigment has electron attractive group bonded with acidic group. The photoelectric conversion element further contains pigment (x).Y',Y",Y1,Y2=-(C(-R57)=C(-R58))-, -(CC)-, group of formula (v) or (vi);X"=nonmetallic atom group required to form nitrogen-containing ring by bonding with benzene ring;R15=H, aliphatic group, aromatic group or heterocyclic group bonded with carbon atom;R56=group having acidic group;R62-R65,R57-R61,R66,R67-R72,R74-R79=H or substituent;e2,e3,h1,h2,h7,h9,h11=e1;g=0 or 1;h3,h4=0, or 1-3;h5,h6=0, or 1-4;Lc=-(CH2)h7- or -Xc-;Xc=O, S or NR79;Lb=-((CH2)h9-Xb)h10-(CH2)h11- or -(CH2)h7-;or substituent of R57-R61=ring;a4=0, or 1-4;Xb=O, S or NR66;M1=two hydrogen atoms, Li or metal atom;R73=group having acidic group;Y3,Y4=CR76R77, S, or NR78;andh8,h10=1 or more. Preferred Definitions:    B'=group of formula (V) having 6 or more group of formula: -(X')-n-A';    n=0 or 1;    X'=S, NR" or O;    NR"=H or substituent;    A'=aromatic group or heterocyclyl, preferably heterocyclyl;    R35-R50=H or substituent;    or R35-R50+adjacent substituent=ring;    or at least one of R35-R50+A or L'=ring;    M=two H or metal atom.    EXAMPLE - 2-((3-((5-Hydrogenio-1,3,3-trimethyl-2,3-dihydro-1H-indol-2-ylidene)methyl)-2-oxido-4-oxocyclobut-2-en-1-ylidene)methyl)-1,3,3,5,7,7-hexamethyl-6-methylidene-3H,5H,6H,7H-pyrrolo(2,3-f)indol-1-ium (in g) (0.5) and 2-((2-ethoxy-3,4-dioxocyclobut-1-en-1-yl)methylene)-1,3,3-trimethylindolin-5-carboxylic acid (0.25) were dissolved in solution of toluene and butanol and stirred at 80 degrees C for 11 hours. Dichloromethane and water were added to mixture, extracted and purified to obtain 2-((3-((5-carboxy-1,3,3-trimethyl-2,3-dihydro-1H-indol-2-ylidene)methyl)-2-oxido-4-oxocyclobut-2-en-1-ylidene)methyl)-6-((3-((5-(5-(5-(9-ethyl-9H-carbazol-3-yl)thiophen-2-yl)thiophen-2-yl)-1,3,3-trimethyl-2,3-dihydro-1H-indol-2-ylidene)methyl)-2-oxido-4-oxocyclobut-2-en-1-ylidene)methyl)-1,3,3,5,7,7-hexamethyl-3H,7H-pyrrolo(2,3-f)indol-1,5-diium (0.35).