Compound having indolocarbazole moiety and divalent linkage

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 R1 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.