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
Failures in power grids: Dynamically induced cascades
25.05.2018 | Technische Universität Dresden
Beyond the limits of conventional electronics: stable organic molecular nanowires
24.05.2018 | Tokyo Institute of Technology
The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.
Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
25.05.2018 | Event News
02.05.2018 | Event News
13.04.2018 | Event News
25.05.2018 | Event News
25.05.2018 | Machine Engineering
25.05.2018 | Life Sciences