POLYMER FOR POSITIVE ELECTRODE BUFFER LAYER, SOLUTION FOR POSITIVE ELECTRODE BUFFER LAYER APPLICATION AND ORGANIC LIGHT EMITTING ELEMENT

摘要

PROBLEM TO BE SOLVED: To provide self-dope type conductive polymer for positive electrode buffer layer free from a problem of light emitting layer deterioration by extraneous dopant.;SOLUTION: The organic light emitting element includes polymer for a positive electrode buffer layer of an organic light emitting element consisting of self-dope type conductive polymer containing monomeric unit having pH 3-7 in a water solution of 1 mass % and expressed by the formula (1) and/or the formula (2), a solution for positive electrode buffer layer application of the organic light emitting element containing the polymer and a positive buffer layer using the polymer. In the formulas, M⁺ expresses hydrogen ion, alkali metal ion or the 4th class ammonium ion, k is 1 or 2, +k expresses the number of positive charges, and the position where hydrogens on aromatic ring are combined may be replaced by substituent.;COPYRIGHT: (C)2005,JPO&NCIPI