Branched phenylene-terminated thiophene oligomers
View Patent ↗A composition comprising a plurality of molecules. Each of the molecules has a core comprising at least one aromatic ring and at least three pendant arms chemically bonded to the core. The pendant arms comprise a phenylene-terminated thiophene oligomer.
1. A composition, comprising:
a plurality of branched organic molecules, each of said molecules having a core and three pendant arms covalently bonded to said core, wherein
said core is an aromatic ring or a fused aromatic ring system,
said pendant arms comprise a phenylene-terminated thiophene oligomer,
a pi-pi conjugation portion of said branched organic molecules includes said terminal phenylene groups of said three pendant arms and said core, and
said branched organic molecule has a molecular weight of less than about 2000 gm/mol.
2. The composition of claim 1 , wherein said phenylene-terminated thiophene oligomer comprises from 1 to 20 thiophene rings.
3. The composition of claim 1 , wherein said core is an aromatic ring.
4. The composition of claim 1 , wherein said core comprises a fused ring system.
5. The composition of claim 1 , wherein one or more of said terminal phenylene group is unsubstituted.
6. The composition of claim 1 , wherein one or more of said terminal phenylene groups are substituted with a fluorocarbon group.
7. The composition of claim 1 , wherein one or more of said terminal phenylene group is substituted with an alkyl group.
8. The composition of claim 1 , wherein all of said pendant arms have an identical chemical formula.
9. The composition of claim 1 , wherein said branched organic molecules are star-shaped molecules.
10. The composition of claim 1 , wherein said plurality of branched organic molecules form an amorphous film.
11. The composition of claim 1 , wherein said plurality of branched organic molecules form a semiconductive film.
12. The composition of claim 1 , wherein said plurality of said branched organic molecules form a light-emitting layer of an OLED.
13. A device, comprising:
a layer composed of said plurality of branched organic molecules of claim 1 .
14. The device of claim 13 , wherein said layer is a semiconductive film in an OFET device.
15. The device of claim 13 , wherein said layer is a p-type semiconductor layer.
16. The device of claim 13 , wherein said layer is an n-type semiconductor layer.
17. The device of claim 13 , wherein said layer is a light-emitting layer of an OLED device.