Lecture Klaus Meerholz
|20 January 2012||Bernoulliborg 5161.0293, Nijenborgh 9, 9747 AG, Groningen|
|Speaker:||Prof. Dr. Klaus Meerholz|
|Affiliation:||Department Chemie, Universität zu Köln|
|Title:||Crosslinkable semiconductors for use in solution-processed organic light-emitting diodes (OLED)|
|Date:||Fri Jan 20, 2012|
|Telephone:||+31 50 363 5553 / 8750|
Organic light emitting diodes (OLEDs) based on electroluminescent conjugated polymers are considered as a promising alternative for display and lighting applications, mainly due to their better compatibility with low-cost production techniques and large substrates. A challenge is multiple-layer deposition to improve the efficiency of the devices and, as a result, their lifetime.
We have in the past developed photochemically crosslinkable semiconductors for fabrication of complex multilayer OLED  and lithographic RGB-pixelation down to the micron scale. [2,3] Grey-scale lithographic capability has been demonstrated, allowing the fabrication of multiple cavities with different lengths in a single processing step and thus permits monolithic integration of multiple OLEDs with different emission wavelengths on a single substrate. By use of nanoporous hole-injection layers improved outcoupling has been demonstrated. Recently, we demonstrated a surface-initiated crosslinking process with high potentials in printing and 3D-coatings. After curing the materials feature excellent thermal robustness, allowing to process on top even elevated temperatures (e..g. up to 200C).
|Last modified:||22 October 2012 2.30 p.m.|