Near-infrared-absorbing composition, near-infrared-absorbing film, and image sensor for solid-state imaging element

A near-infrared absorbing composition comprising a near-infrared absorber and a solvent, wherein the near-infrared absorber contains at least one of the following component (A) or component (B),

• Component (A):
• a component composed of a phosphonic acid compound represented by the following Formula (I), two or more kinds of phosphoric acid ester compounds or sulfonic acid ester compounds having different structures, and copper ions;
• and
• Component (B):
• a component composed of a copper complex obtained by a reaction of a phosphonic acid compound represented by the following Formula (I), two or more kinds of phosphoric acid ester compounds or sulfonic acid ester compounds having different structures, and a copper compound,
• in Formula (I), R1 represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or a fluorinated alkyl group having 1 to 20 carbon atoms, and
• wherein the two or more kinds of phosphoric acid ester compounds or sulfonic acid ester compounds having different structures in the component (A) and the component (B) contain a compound A and a compound B, wherein the compound A has a structure represented by the following Formula (II), and is selected from the phosphoric acid ester compound or the sulfonic acid ester compound in which 1 and m each are respectively 0 or more, and the total number of 1 and m (1+m) is 1 or more and less than 4, and the compound B has a structure represented by the following Formula (II), and is selected from the phosphoric acid ester compound or the sulfonic acid ester compound in which 1 and m each are respectively 0 or more, and the total number of 1 and m (1+m) is in the range of 4 to 10,
• in the above Formula (II), R represents an alkyl group having 1 to 20 carbon atoms or an aryl group having 6 to 20 carbon atoms, R may further have a substituent, and Z represents a structural unit selected from Formulas (Z-1) to (Z-3) below,
• an asterisk (*) described in the above Formulas (Z-1) to (Z-3) represents a binding site and binds 0 in the above Formula (II),
• R21 to R24 each respectively represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms,
• provided that the compound having a structure represented by Formula (II) has at least one partial structure satisfying the following condition (i) or one partial structure satisfying the condition (ii), or has at least both of one partial structure satisfying the following condition (i) and one partial structure satisfying the condition (ii),
• Condition (i):
• R21 to R24 all represent a hydrogen atom;
• and
• Condition (ii):
• at least one of R21 to R24 represents an alkyl group having 1 to 4 carbon atoms,
• in Formula (II), 1 represents a number of partial structures satisfying the above condition (i), m represents a number of partial structures satisfying the above condition (ii), 1 and m in the compound A each are respectively 0 or more, the total number of 1 and m (1+m) is 1 or more and less than 4, 1 and m in the compound B each are respectively 0 or more, and the total number of 1 and m (1+m) is in the range of 4 to 10.