Polymer light-emitting diodes (PLEDs) are attractive for use in large–area displays and lighting panels, but their limited stability impedes commercialization. Scientists of the Max Planck Institut for Polymer Research (MPIP) in Mainz have discovered the reasons for instability.
Monitor screens and smartphones that can be rolled and folded up are applications that could become possible in the future thanks to the development of polymer (plastic) based semiconductors.
Electronics from these conducting plastics pave the way for affordable, flexible and printable electronic components. A major obstacle hindering the market introduction of plastic based light-emitting diodes (PLEDs) is their relatively limited stability.
After a few months of continuous operation their light-output starts to decrease. In spite of many investigations in both industry and academic laboratories the cause of this degradation effect is only poorly understood.
Researchers at the Max Planck Institute for Polymer Research have recently discovered the mechanism causing the PLED degradation.
During degradation defects are formed that strongly reduce the current injected from the positive electrode. Furthermore, these defects lead to unwanted losses in the light generation processes.
The research results are published in the latest edition of the scientific journal Nature Materials.
By using a mixture of two polymers (plastics) the effect of the defects can be strongly suppressed, leasing to improved stability of the PLEDs.
Professor Paul Blom, Director at the Max Planck Institute for Polymer Research and head of its department for Molecular Electronics, and his research team are confident that the improved stability will boost the applicability of plastic light-emitting diodes.
Beate Schiewe | Max-Planck-Institut für Polymerforschung
Nano-scale process may speed arrival of cheaper hi-tech products
09.11.2018 | University of Edinburgh
Nuclear fusion: wrestling with burning questions on the control of 'burning plasmas'
25.10.2018 | Lehigh University
Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.
Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure
Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...
19.11.2018 | Event News
09.11.2018 | Event News
06.11.2018 | Event News
19.11.2018 | Materials Sciences
19.11.2018 | Information Technology
19.11.2018 | Life Sciences