Vertically phase-separating semiconducting organic material layers

摘要

Improved OLED devices and methods of making the same using vertical phase separation to simplify processing. Vertically phase separated material can include at least one lower first layer disposed on the electrode, and at least one upper second layer different from the first layer and disposed away from the electrode or optionally on one layer comprising at least one semiconducting organic material. The first layer can be enriched with at least one first semiconducting organic material (SOM 1) and the second layer can be enriched with at least one second semiconducting organic material (SOM 2) different from the SOM 1. The ink composition can be adapted so that the film vertically phase separates into the first and second layers. Compositions and devices are also embodied herein.

主权项

1. A composition comprising:
a first semiconducting organic material (SOM 1); a second semiconducting organic material (SOM 2) different from the SOM 1; at least one solvent system, wherein the SOM 1 is a hole injection material (HIM) and the SOM 2 is a hole transporting material (HTM) different from the hole injection material, wherein the SOM 2 is functionalized to encourage surface enrichment of the SOM 2 away from a substrate when the solvent system is removed and a film is formed on the substrate, wherein the SOM 2 comprises N4,N4′-bis(4-tridecafluorononyloxyphenyl)-N4,N4′-diphenyl-[1,1′-biphenyl]-4,4′-diamine.