| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for forming a phosphorescent OLED (organic light-emitting diode) by solution deposition of layers, which is not constrained by the nature of an active material being used.SOLUTION: A method for forming an organic light-emitting diode is provided, which includes steps of: providing a substrate 1 having a first electrode 2 for injection of charge carriers of a first type; forming a charge transporting layer 4 by depositing on the substrate a charge transporting material for transporting charge carriers of the first type, where the charge transporting material is soluble in a first solvent; changing the charge transporting layer into insoluble in the first solvent; forming an electroluminescent layer 5 by depositing a composition comprising the first solvent, a phosphorescent material and a host material on the charge transporting layer; and vapor depositing a second electrode 6 for injection of charge carriers of a second type on the electroluminescent layer. |
