Patent ID: 6376105
Filing Date: 2002-04-23
Classification: H01L,Y10S

Abstract:
Electroluminescing arrangement comprising a hole-injecting layer comprising thiophene of the formula (I) whereinR1 and R2 denote, independently of one another, hydrogen, optionally substituted C1-C20-alkyl, CH2OH or C6-C14-aryl, or R1 and R2 together denote â€”(CH2)mâ€”CH2â€” with m=0 to 12 or C6-C14-arylene, and n is an integer from 5 to 100, wherein the thiophene of the formula (I) is in cationic form in the presence of a polymeric sulfonic acid or a polymeric carboxylic acid as a polyanion; an emitter layer; and a pair of electrodes, wherein at least one of said electrodes is transparent and consists of a material selected from the group consisting of metal oxides and semi-transparent metal films and wherein said hole-injecting layer is directly located on a transparent electrode.