Ossila's PhD Student Achieves High-Efficiency Slot-Die Coated OLEDs
Posted on Tue, Jan 15, 2019 by Jon Griffin
After his completing his secondment at Ossila, our Excilight PhD student Amruth has been working hard to publish a paper on his efforts to slot-die coat organic light-emitting diodes (OLEDs). We are excited to announce that his research, titled 'Slot-Die Coating of Double Polymer Layers for the Fabrication of Organic Light Emitting Diodes' has been published in Micromachines, 10(1), 53.
In this work, Amruth covers the optimisation process for slot-die coating the solution-processed layers used in OLEDs. The OLEDs are made up of a commonly-used system involving a blend of F8BT and PFO deposited onto a PEDOT:PSS hole-transport layer. Alongside this optimisation process, he compares the properties of these thin films and devices against spin-coated references, showing that films deposited via slot-die coating are comparable to those deposited via spin coating. The Ossila Slot-Die Coater was used in this paper.
The basic OLED architecture was comprised of a hole-transport material (HTM) layer and semiconductor emissive layer sandwiched between the two electrodes. Both of these organic layers were deposited by slot-die coating. The OLED efficiency achieved via the slot-die coating method in this paper was found to be 17 times higher than in a 2017 paper for similar OLEDs that used a slot-die coated F8BT layer.
If you are interested in learning more about the slot-die coating technique, you can read the guides below: