Patent ID: 7585933

Claim:
A dendritic polymer having a branching structure including repeating units each having a branch portion, each of said repeating units having a structure represented by formula ( 1 ), and containing a linear portion X formed of an optionally substituted divalent organic group and a branch portion Y formed of an optionally substituted trivalent organic group: characterized in that the linear portion X is represented by formula (3): wherein Z represents a single bond or an optionally substituted divalent organic group which is at least partially conjugated with thienylene; and each of R 4 and R 5 is selected from hydrogen, an alkyl group, and an alkoxy group; and the linear portion X is at least partially conjugated with the branch portion Y; the portion Y included in the repeating unit and serving as an end of the branching structure is bonded to end moieties which are different from the repeating unit; wherein the end moieties have hole conductivity, electron conductivity, or ion conductivity; and in that the polymer exhibits semiconducting characteristics.