Patent ID: 7396852

Claim:
A compound consisting of at least one type of an optionally substituted indolocarbazole moiety and at least one divalent linkage including at least one atom, wherein the at least one divalent linkage is independently selected from the group consisting of the following structural units which are optionally substituted: an oxygen atom, one or more optionally substituted thienylene group, each thienylene group being the same or different from each other and of the structure (I) where R 1 is independently selected from a hydrocarbon group, a heteroatom group, and a halogen, and where m is 0, 1, or 2, and a combination thereof, wherein X is selected from the group consisting of C(R′R″), O, S, Se, NR′, and Si(R′R″), and wherein R′ and R″ are independently selected from the group consisting of a hydrocarbon group, a heteroatom-containing group, a halogen and a mixture thereof; and Y is a carbon atom or a nitrogen atom.