Crosslinkable hole-transport materials for preparation of multilayer organic light emitting devices by spin-coating

Our approach to prepare multilayer light emitting devices (LEDs) by low-cos t spin-coating techniques is the combination of spin-coating and photo-cros slinking. The oxetane functionality was used as the polymerizable moiety, w hich was crosslinked in bulk by a cationic mechanism. The resulting films w ere resistant against solvents used in subsequent spin-coating steps. The s ynthesis of bis-functionalized hole transporting triarylamines by palladium catalyzed C-N-coupling reaction, their polymerization, characterization, a nd first application in two-layer blue light emitting OLEDs are presented.