Formulation and method for preparation of organic electronic devices

摘要

The present invention relates to novel formulations comprising an organic semiconductor (OSC) and one or more organic solvents. The formulation comprises a viscosity at 25° C. of less than 15 mPas and the boiling point of the solvent is at most 400° C. Furthermore, the present invention describes the use of these formulations as inks for the preparation of organic electronic (OE) devices, especially organic photovoltaic (OPV) cells and OLED devices, to methods for preparing OE devices using the novel formulations, and to OE devices, OLED devices and OPV cells prepared from such methods and formulations.

主权项

1. Formulation comprising one or more organic semiconducting compounds (OSC), and one or more organic solvents, wherein:
one or more organic semiconducting compound has a molecular weight of 2000 g/mol or less and is of the formula P6:wherein
n is an integer >1, R on each occurrence identically or differently denotes H, F, Cl, Br, I, CN, a straight-chain, branched or cyclic alkyl group having from 1 to 40 C atoms, in which one or more C atoms are optionally replaced by O, S, O—CO, CO—O, O—CO—O, CR0═CR0 or C≡C such that O— and/or S-atoms are not linked directly to each other, and in which one or more H atoms are optionally replaced by F, Cl, Br, I or CN, or denotes an aryl or heteroaryl group having from 4 to 20 ring atoms that is unsubstituted or substituted by one or more non-aromatic groups Rs, and wherein one or more groups R may also form a mono- or polycyclic aliphatic or aromatic ring system with one another and/or with the ring to which they are attached, Rs on each occurrence identically or differently denotes F, Cl, Br, I, CN, Sn(R00)3, Si(R00)3 or B(R00)2 a straight-chain, branched or cyclic alkyl group having from 1 to 25 C atoms, in which one or more C atoms are optionally replaced by O, S, O—CO, CO—O, O—CO—O, CR0═CR0, C≡C such that O—and/or S-atoms are not linked directly to each other, and in which one or more H atoms are optionally replaced by F, Cl, Br, I or CN, or Rs denotes an aryl or heteroaryl group having from 4 to 20 ring atoms that is unsubstituted or substituted by one or more non-aromatic groups Rs, and wherein one or more groups Rs may also form a ring system with one another and/or with R, R0 on each occurrence identically or differently denotes H, F, Cl, CN, alkyl having from 1 to 12 C atoms or aryl or heteroaryl having from 4 to 10 ring atoms, R00 on each occurrence identically or differently denotes H or an aliphatic or aromatic hydrocarbon group having from 1 to 20 C atoms, wherein two groups R00 may also form a ring together with the hetero atom (Sn, Si or B) to which they are attached, the formulation has a viscosity at 25° C. of less than 15 mPas and the boiling point of one or more organic solvent is at most 400° C.