Patent ID: 8252432

Claim:
A composition for a charge-transport film, comprising at least: a charge-transporting compound having an ionization potential of between 4.5 and 5.5 eV; and an ionic compound selected from the group consisting of the compounds of formulae (1)-(3), wherein: R 11 , R 21 and R 31 represent, independently of each other, an organic group bound to A 1 -A 3 , respectively, via a carbon atom; R 12 , R 22 , R 23 and R 32 -R 34 represent, independently of each other, an arbitrary group; wherein two or more neighboring groups of R 11 -R 34 may combine together to form a ring; A 1 -A 3 each represent an element belonging to the third and subsequent periods in the periodic table; A 1 represents an element belonging to group 17 of the long form periodic table; A 2 represents an element belonging to group 16 of the long form periodic table; A 3 represents an element belonging to group 15 of the long form periodic table; Z 1 n1− -Z 3 n3− represent, independently of each other, a counter anion; and n1-n3 represent, independently of each other, an ionic valency of the counter anion.