Charge-transporting composition

Abstract

As a charge-transporting composition which can greatly improve the dark current properties of an organic photoelectric conversion element when the composition is used in the element, a charge-transporting composition for forming a charge-transporting thin film in an organic photoelectric conversion element is provided. The charge-transporting composition comprises a charge-transporting substance and an organic solvent, in which the charge-transporting substance comprises at least one polyimide-based polymer selected from the group consisting of a polyimide precursor produced from a diamine component having a structure represented by formula (1) or (2) and a tetracarboxylic acid component, an ester of the polyimide precursor, and an imidized product of the polyimide precursor. (In the formulae, R1 represents a hydrogen atom or a monovalent organic group; * indicates a position at which another group is bound; and an arbitrary hydrogen atom forming a benzene ring may be substituted by a monovalent organic group.)

Dependencies are inferred from the claim text.