Abstract: A thin film that has high flatness and high charge transport properties and enables an organic EL element to achieve excellent luminance characteristics if applied thereto can be obtained by using a charge-transporting varnish which contains a charge-transporting substance, an organosilane compound that is composed of a polymer prepared in advance by subjecting an alkoxysilane compound to hydrolysis-condensation and having a weight average molecular weight of 500-10,000, and an organic solvent, said alkoxysilane compound containing at least one compound selected from among alkoxysilane compounds represented by formulae (1-1) and (1-2). SiR1(OR2)3 (1-1) SiR12(OR2)2 (1-2) (In the formulae, each R1 independently represents an alkyl group having 1-20 carbon atoms, which is substituted by Z1, or the like; each R2 independently represents an alkyl group having 1-20 carbon atoms, which may be substituted by Z3; and each of Z1 and Z3 represents a halogen atom or the like.).

Abstract: A thin film that has high flatness and high charge transport properties and enables an organic EL element to achieve excellent luminance characteristics if applied thereto can be obtained by using a charge-transporting varnish which contains a charge-transporting substance, an organosilane compound that is composed of a polymer prepared in advance by subjecting an alkoxysilane compound to hydrolysis-condensation and having a weight average molecular weight of 500-10,000, and an organic solvent, said alkoxysilane compound containing at least one compound selected from among alkoxysilane compounds represented by formulae (1-1) and (1-2). SiR1(OR2)3 (1-1) SiR12(OR2)2 (1-2) (In the formulae, each R1 independently represents an alkyl group having 1-20 carbon atoms, which is substituted by Z1, or the like; each R2 independently represents an alkyl group having 1-20 carbon atoms, which may be substituted by Z3; and each of Z1 and Z3 represents a halogen atom or the like.