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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
Start: 10.45
Location: Bernoulliborg 5161.0293
Host: J.C. Hummelen
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 [1] 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.[4] By use of nanoporous hole-injection layers improved outcoupling has been demonstrated.[5] Recently, we demonstrated a surface-initiated crosslinking process with high potentials in printing and 3D-coatings.[6] 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.