A hole transporting varnish for a metal anode and a composite metal anode

摘要

This hole transporting varnish for metal positive electrodes, which contains, for example, a charge transporting material that is composed of an aniline derivative represented by formula (1), a dopant material that is composed of a heteropolyacid, and an organic solvent, provides a thin film that has excellent ability of accepting holes from a metal positive electrode and is suitable for use as a hole injection layer which is formed on the metal positive electrode. (In the formula, X1 represents -NY1-, -O-, -S-, -(CR7R8)l- or a single bond; each Y1 independently represents a hydrogen atom or the like; each of R1-R8 independently represents a hydrogen atom, a halogen atom or the like; and each of m and n independently represents an integer of 0 or more, while satisfying 1 ≤ m + n ≤ 20, provided that in cases where m or n is 0, X1 represents -NY1-.)