Polymer-based Optoelectronic Devices with Interlayers

Add to your list(s) Download to your calendar using vCal

• Dieter Neher, University of Potsdam
• Monday 15 January 2007, 14:30-15:30
• Small Lecture Theatre, Cavendish Laboratory, Department of Physics.

If you have a question about this talk, please contact Chris McNeill.

Recently, a novel approach to insert ultrahin polymer layers with well-controllable electronic properties into solution-processed optoelectronic device structures has been proposed [1]. This approach allows to establish property-function relationships, which are not accessible by the study of conventional blend device. Experiments on electrophosphorescent devices as well as Kelvin-probe experiments under illumination show that these layers are dense and exhibit a strong electron-blocking function [2]. Upon proper choice of the HOMO and LUMO level of the interlayer material, efficient recombination of charges at the interface could be realized. Comparable studies on bilayer and solar cell devices based on poly(p-phenylene vinylenes) suggest that the performance of these devices is not determined by charge transport and free carrier recombination. This supports the view that the efficiency to form free carriers is the main limiting factor.

[1] J. S. Kim, R. H. Friend, I. Grizzi, J. H. Burroughes, Appl. Phys. Lett. 87 (2006) 023506. [2] X.H. Yang, F. Jaiser, B. Stiller, D. Neher, F. Galbrecht, U. Scherf, Adv. Funct. Mater. 16 (2006) 2156

This talk is part of the Optoelectronics Group series.

This talk is included in these lists:

• All Cavendish Laboratory Seminars
• All Talks (aka the CURE list)
• Centre for Health Leadership and Enterprise
• Featured lists
• ME Seminar
• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
• Optoelectronics Group
• School of Physical Sciences
• Small Lecture Theatre, Cavendish Laboratory, Department of Physics
• Thin Film Magnetic Talks
• few29

Note that ex-directory lists are not shown.