Patent ID: 6613457
Filing Date: 2003-09-02
Classification: H01L,Y10S

Abstract:
An organic light emitting diode having an anode, a cathode and an emissive layer disposed between the anode and cathode, the emissive layer including the following repeating unit which is used to form a homopolymer or a copolymer comprising the structure: wherein:0&lE;x<1, 0S and T are each independently a chemical bond, an oxygen or sulfur atom, or Câ€”R, or Nâ€”R wherein C is a carbon atom, N is a nitrogen atom, and R is a substituent including hydrogen, alkyl group of from 1 to 24 carbon atoms, or aryl or substituted aryl of from 6 to 28 carbon atoms, or heteroaryl or substituted heteroaryl of from 4 to 40 carbons, or a cyano group, a nitro group, a chlorine, bromine, or a fluorine atom; In each ring, including D and E, if either D or E is a single bond, then the other group is not a single bond and is Râ€”Câ€”R, wherein C is a carbon atom and R is a substituent; Ar1, Ar2, and Ar are each individually aryl or substituted aryl of from 6 to 40 carbon atoms; or Ar1, Ar2, and Ar are each individually substituted heteroaryl or unsubstituted heteroaryl having 4 to 40 carbons.