OPTICAL DEVICE COMPRISING A CHARGE TRANSPORT LAYER OF INSOLUBLE ORGANIC MATERIAL AND METHOD FOR THE PRODUCTION THEREOF

摘要

A method of forming an organic light emitting diode comprising the steps of: providing a substrate comprising a first electrode for injection of charge carriers of a first type; forming a charge transporting layer by depositing over the substrate a charge transporting material for transporting charge carriers of the first type, the charge transporting material being soluble in a solvent; treating the charge transporting layer to render it insoluble in the solvent; forming an electroluminescent layer by depositing onto the charge transporting layer a composition comprising the solvent, a phosphorescent material, and a host material; and depositing over the electroluminescent layer a second electrode for injection of charge carriers of a second type.

主权项

1. A method of forming an organic light emitting diode comprising, in sequence, a first electrode for injection of charge carriers of a first type; a first charge transporting layer comprising a first charge transporting material for transporting charge carriers of the first type; an electroluminescent layer adjacent to the charge transporting layer; and a second electrode for injection of charge carriers of a second type,
the method comprising the steps of: forming the first charge transporting layer by a solution processing method from a composition comprising a solvent and the first charge transporting material being soluble in the solvent; rendering the first charge transporting layer insoluble in the solvent; and forming the electroluminescent layer from a composition comprising a solvent, a phosphorescent material and a small molecule host material.