Polyimide layer comprising functional material, device employing the same and method of manufacturing same device

A layer for use in electronic and optoelectronic devices, comprising polyimide and one or more organic materials selected from the group consisting of hole transport materials, electron transport materials and emitter materials having a glass transition temperature of more than 80° C. and a molecular weight of greater than 750, wherein said hole transport material is a compound or a mixture of compounds selected from the group consisting of:

• a. compounds of formula (1):
• wherein Ar1 is selected from the group consisting of compounds 1, 2, 3, 4 and 5:
• wherein Ar2 to Ar7 are, independently of each other, selected from the group consisting of compounds (a), (b), (c), (d) and (e):
• wherein R1′ to R9′ are, independently of each other, a hydrogen atom, a —CHnH2n+1 residue, a —OCnH2n+1 residue, wherein n is an integer from 1 to 20, or a group of the formula:
• b. compounds of the formula (II):
• wherein Ar1′ to Ar4′ are, independently of each other, a compound selected from the group consisting of compounds (1) to (5) as above, and wherein Ar2 to Ar9, independently of each other, are compounds selected from the group consisting of compounds (a) to (e) as above;
• and
• c. compounds of the formula (III):
• wherein Ar is:
• wherein R1′ to R12′ are, independently of each other, selected from the group consisting of those compounds recited for R1′ to R9′ above, and wherein Ar is the same as Ar or is a compound selected from the group consisting of those recited for compounds (a) to (e) above, and wherein said layer is adapted to be aligned.