Patent ID: 9172048
Filing Date: 2015-10-27
Classification: C08G,C09D,H01B,H01L,H05B,Y02E,Y10T

Abstract:
1. A charge-transporting varnish which has a viscosity of 1 to 60 mPa·s at 20° C. and comprises a charge-transporting substance composed of a charge-transporting oligomer having a number-average molecular weight of 200 to 2,000, or a charge-transporting organic material composed of said charge-transporting substance and a charge-accepting dopant substance composed of an electron accepting dopant substance or hole accepting dopant substance, a first solvent containing at least one species of high-viscosity solvent having a viscosity of 10 to 200 mPa·s at 20° C., and one or more second solvents selected from the group consisting of N,N-dimethylacetamide and N,N′-dimethylimidazolidinone, wherein said charge-transporting substance or charge-transporting organic material is dissolved or uniformly dispersed in said solvents, and wherein said charge-transporting substance is a 1,4-dithiin derivative represented by the formula (4): where R