A compound represented by Formula (1) or (11) below,

X-A.sup.1-(N═N-A.sup.2).sub.n-N═N-A.sup.3-Y  (1) (in Formula (1), -A.sup.1- and -A.sup.2- each independently represent an unsubstituted or substituted divalent group of an aromatic heterocyclic ring including one or more S atoms wherein atoms constituting the aromatic heterocyclic ring other than a carbon atom are not adjacent to one another, an unsubstituted or substituted divalent group of a benzisothiazole ring, or an unsubstituted or substituted divalent group of an aromatic hydrocarbon ring; -A.sup.3- represents an unsubstituted or substituted divalent group of an aromatic hydrocarbon ring; —X represents a branched alkyl, alkoxy, or alkylsulfanyl group having 3 or more carbon atoms; —Y represents a monovalent organic group; n represents 1, 2, or 3; when n is 2 or 3, a plurality of -A.sup.2-'s may be identical to or different from one another; and -A.sup.1- and -A.sup.2- do not represent an unsubstituted or substituted divalent group of an aromatic hydrocarbon ring at the same time),

X-A.sup.41-(N═N-A.sup.42).sub.n-N═N-A.sup.43-Y  (11) (in Formula (11), at least one -A.sup.42- represents an unsubstituted or substituted divalent group of an aromatic heterocyclic ring including one or more S atoms; -A.sup.41- and -A.sup.43- each independently represent an unsubstituted or substituted divalent group of an aromatic hydrocarbon ring; —X represents a branched alkyl, alkoxy, or alkylsulfanyl group having 3 or more carbon atoms; —Y represents a monovalent organic group; n represents 1, 2, or 3; and when n is 2 or 3, a plurality of -A.sup.42-'s may be identical to or different from one another).

Provided is a black pigment that enables pattern formation of pixel division layer while suppressing generation of development residue. The black pigment comprises (a) a core containing at least one organic black pigment selected from the group consisting of benzodifuranone-based black pigments, perylene-based black pigments, azo-based black pigments, and isomers thereof and (b) a coating layer containing silica and/or a metal oxide and/or a metal hydroxide.

Provided is a black pigment that enables pattern formation of pixel division layer while suppressing generation of development residue. The black pigment comprises (a) a core containing at least one organic black pigment selected from the group consisting of benzodifuranone-based black pigments, perylene-based black pigments, azo-based black pigments, and isomers thereof and (b) a coating layer containing silica and/or a metal oxide and/or a metal hydroxide.

A compound of formula (1) or (11):
X-A.sup.1-(N?N-A.sup.2).sub.n-N?N-A.sup.3-Y(1)
X-A.sup.41-(N?N-A.sup.42).sub.n-N?N-A.sup.43-Y(11), -A.sup.1- and -A.sup.2- being independently a divalent group of an S-containing aromatic heterocyclic ring, with no adjacent non-carbons in the ring, a divalent group of a benzisothiazole ring, or a divalent group of an aromatic hydrocarbon ring, -A.sup.3- being a divalent group of an aromatic hydrocarbon ring, X is a branched alkyl, alkoxy, or alkylsulfanyl group having 3 or more carbon atoms, Y is a monovalent organic group, n is 1, 2, or 3, when n is 2 or 3, a plurality of -A.sup.2-s and/or -A.sup.42-s optionally differing, wherein -A.sup.1- and -A.sup.2- are not both a divalent group of an aromatic hydrocarbon ring, at least one -A.sup.42- is a divalent group of an S-containing aromatic heterocyclic ring, -A.sup.41- and -A.sup.43- are independently a divalent group of an aromatic hydrocarbon ring.

Organic dye for a dye sensitized solar cell (DSSC) comprising at least one substituted pyrrole group. Said organic dye is particularly useful in a dye sensitized photoelectric transformation element which, in its turn, can be used in a dye sensitized solar cell (DSSC).

Provided is a pigment dispersion excellent in the dispersibility of C.I. Pigment yellow 185. The pigment dispersion includes C.I. Pigment yellow 185 and a compound represented by the following formula (1), which are dispersed in a dispersing medium: ##STR00001##