Cross-linkable charge transport materials

Abstract

A compound of the formula, plus devices incorporating this compound, and a method of marking such devices: wherein: A represents a phenyl group, a naphthyl group, a biphenyl group or two phenyl groups linked by a C1-C8 alkyl chain; B1 and B2 in each occurrence are independently selected side chains of the structure —(Y1)n-L-(Y2)m—X wherein: Y1 and Y2 in each occurrence are independently selected from O, CO2— and CH2O, m and n in each occurrence are independently selected from 0 or 1; L in each occurrence is a C2-C14 straight chain alkyl group; and X in each occurrence is an independently selected cross linkable group; C is a side chain of the structure —(Z1)p-M-(Z2)q-E wherein: Z1 and Z2 are independently selected from O, CO2— and CH2O, p and q in each occurrence are independently selected from 0 or 1; M is a C1-C14 straight chain alkyl group; and E comprises a charge transport group; D is a side chain of the structure —(W1)r—N—(W2)s—F wherein: W1 and W2 are independently selected from O, CO2— and CH2O, r and s in each occurrence are independently selected from 0 or 1; N is a C1-C14 straight chain alkyl group; and F comprises a charge transport group or light emitter group; and wherein the charge transport group E does not contain a fluorene group other than those that form part of a spirobifluorenearylamine motif.

Dependencies are inferred from the claim text.