| abstract |
A hole-transporting varnish for a metal anode containing a charge-transporting substance comprising, for example, aniline derivatives represented by formula (1), a dopant substance comprising a heteropolyacid, and an organic solvent can form a metal anode accepting A thin film that has excellent hole capacity and is suitable for use as a hole injection layer formed on a metal anode. (X 1 represents -NY 1 -, -O-, -S-, -(CR 7 R 8 ) l - or a single bond; Y 1 independently represents a hydrogen atom, etc.; R 1 to R 8 independently represent hydrogen atom, halogen atom, etc.; m and n independently represent an integer of 0 or more, and satisfy 1≤m+n≤20. In the formula, when m or n is 0, X 1 represents -NY 1 -). |