IMO-IMOMEC lectures on advanced materials
Feb 12, 2016
Agoralaan Gebouw D
Lokaal Lecture room A5
Prof. dr. Dirk VANDERZANDE
Prof. Dr. Dirk Vanderzande (IMO-IMOMEC director) would like to invite you to this lecture on advanced materials.
Speaker: Prof. Dr. Jorge Morgado, University of Lisbon and Instituto de telecomunicações, Instituto superior técnico, Lisboa, Portugal.
12 February 2016, 11:00 -12:00
Lecture room A5, Building D, Hasselt University, Campus Diepenbeek.
In this presentation, two examples of the influence of organic layers morphology on device performance will be discussed.
We have been studying the role of phenanthrolines (BPhen and BCP) as electron-extraction layers on the performance of organic photovoltaics. In particular, we found that both materials grow as nanostructured layers, with columnar grain-like structures, with pillars having heights much larger than the average layer thickness. Yet, we found that the presence of such interlayers, in combination with LiF/Al electrodes, leads to significant efficiency improvements.
The second part is devoted to the study of light-emitting diodes based on polymer blends, which combine polymers with efficient energy transfer. We found that the use of a solvent additive leads to a suppression of that energy transfer process, which we attribute to changes in the blend film morphology.