| abstract |
It contains a 2,2,6,6-tetraalkylpiperidine-N-oxyl derivative represented by the formula (T1), a charge transporting substance, and an organic solvent, and contains a good solvent and a poor solvent as the organic solvent. Provided is a varnish for charge transport thin film formation. (Wherein, each R A independently represents an alkyl group having 1 to 20 carbon atoms, and R B represents a hydroxy group, an oxo group, or an acetamide group). |