Patent ID: 7834199
Filing Date: 2010-11-16
Classification: H01L

Abstract:
1. A small molecular thiophene compound consisting of: a plurality of thiophene units, each thiophene unit being represented by structure (A) wherein each thiophene unit is bonded at either or both of the second ring position and the fifth ring position, wherein m is 0, 1, or 2, wherein each thiophene unit is the same or different from each other, wherein each R (a) a hydrocarbon group, (b) a heteroatom containing group, and (c) a halogen, there is excluded the simultaneous presence of the same or different R 1 at the 3-position of one thiophene unit and at the 3′-position of the other thiophene unit, and wherein the number of the thiophene units is at least 6; and at least one divalent linkage selected from the group consisting of: wherein n is 0, 1, 2, 3, or 4, and when n is at least 2, the substituents of R