POLYIMIDE PRECURSOR, POLYIMIDE, CHARGE TRANSPORT COMPOSITION, AND METHOD FOR PRODUCING POLYIMIDE PRECURSOR

摘要

PROBLEM TO BE SOLVED: To provide a polyimide (precursor), with which element characteristics of an organic EL element or the like can be improved when used together with a charge transport material.SOLUTION: A polyimide precursor or a polyimide includes any of ferrocene-containing groups represented by formula (10) to (12) (wherein each of Rto Rrepresents a hydrogen atom or the like, and W represents a divalent hydrocarbon group or the like).