COMPOSITION FOR USE IN ORGANIC ELECTROLUMINESCENT ELEMENT, THIN FILM FOR USE IN ORGANIC ELECTROLUMINESCENT ELEMENT, THIN FILM TRANSFER MEMBER FOR USE IN ELECTROLUMINESCENT ELEMENT, ORGANIC ELECTROLUMINESCENT ELEMENT AND METHOD FOR MANUFACTURING ORGANIC ELECTROLUMINESCENT ELEMENT

摘要

PROBLEM TO BE SOLVED: To provide an organic electroluminescent element which has an organic luminescent layer formed by a wet type film-forming method and has good charge injection characteristics from an electrode to the organic luminescent layer, and which is excellent in the light emission efficiency and in the driving life.;SOLUTION: The composition for forming the organic luminescent layer of the organic electroluminescent element by the wet type film-forming method contains a phosphorescence emitting material, a charge transport material and a solvent, wherein each of the phosphorescent material and the charge transport material is an unpolymerizable organic compound, and wherein a relationship among the first oxidation potential E_D⁺ of the phosphorescence emitting material, the first reduction potential E_D^- of the phosphorescence emitting material, the first oxidation potential E_T⁺ of the charge transport material and the first reduction potential E_T^- of the charge transport material is expressed by formula E_T^-+0.1E_D^-E_T⁺E_D⁺-0.1 or E_D^-+0.1E_T^-E_D⁺E_T⁺-0.1.;COPYRIGHT: (C)2009,JPO&INPIT