Patent ID: 7919010

Claim:
A doped organic semiconductor material comprising an organic matrix material which is electrically doped with at least one acridine derivative, the compound having at least one nitrogen atom with a free electron pair, wherein the dopant has a pKa value of between about 8.0 and about 14.0, wherein the organic matrix material is an electron transporter, and wherein the matrix material is selected from fullerene, 1,2,3,4,8,9,10,11,15,16,17,18,22,23,24,25-hexadecafluorophthalo-cyanine zinc, naphthalene tetracarboxylic acid di-anhydride, or any combination thereof; and wherein the acridine derivative is of the formula (I): wherein R is selected independently each time it occurs from alkyl, aralkyl, aryl, or cycloalkyl.