Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Micropatterning OLEDs using electron beam technology

27.04.2016

The Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP will be presenting the first micro-OLEDs patterned using electron beam at Booth 1023 during SID Display Week 2016 in San Francisco / USA from May 24 – 26.

Fraunhofer FEP has years of experience in the field of processing organic semiconductor materials. Scientists here are also developing organic light-emitting diodes (OLEDs) and OLED microdisplays based on organic semiconductors.


OLED patterned with an electron beam

© Fraunhofer FEP / Photographer Semper Opera: Christof Lippmann


OLED patterned with an electron beam (Patterning: A. Rudzinski, Raith GmbH)

© Fraunhofer FEP / Photographer: Jürgen Lösel

Currently, techniques and new applications of electron beam technology – an additional area of core expertise at Fraunhofer FEP – are being particularly investigated in the field of organic electronics. Due to their outstanding optical and electronic properties, OLEDs have a broad range of potential applications in mobile electronics and displays.

Especially small displays with high pixel density, such as OLED microdisplays, are necessary for future applications such as augmented- or virtual-reality, for example. Researchers are now working on further miniaturizing while maintaining high resolution.

The patterning of the organic layers in OLEDs represents one of the biggest challenges, as conventional methods such as photolithography cannot be applied to organic semiconductor materials easily.

Fraunhofer FEP scientists have developed a novel approach to pattern the emission area of an OLED at high resolution. The patented technology uses an electron beam process, which takes place after finalizing the OLED including the encapsulation. Therefore it is possible to build the OLED highly productive and completely unpatterned, before the emission is individually modified by an adjusted electron beam process.

The energy of the electrons determines their penetration depth in the layer stack. With a suitable choice of process parameters, the encapsulation can also be penetrated by the electron beam and the luminous characteristics of the organic layers beneath will change without destroying or compromising the encapsulation itself. Depending on the application, it is even possible to modify individual layers directly.

“Continuous gray scales in an image can be created on a monochrome OLED using the electron beam, while at the same time the local current consumption is reduced. The longer the dwell time on one spot with the beam, the darker the OLED will appear there”, explains Elisabeth Bodenstein from the development team at Fraunhofer FEP. “An impressive example is the white OLED shown, in which the image of the famous Dresden Semperoper was structured with the electron beam in a hundred seconds.”

Even with a write time of less than two minutes, an impressive resolution of 12,700 dpi was attained – corresponding to 2 µm spacing of the image dots. The structuring of the OLED was carried out with an electron beam lithography system of Raith GmbH, the leading manufacturer of nanofabrication systems.

The process is highly adaptable – regardless of whether the OLED is applied to a rigid medium or flexible film, what color the OLED is, or whether the substrate is optically opaque, translucent, or transparent. The size of the substrate is universal as well and can be matched to the corresponding application. An enhancement to full-color patterning is being planned.

The Fraunhofer FEP scientists are now prepared to put this new technology into practice with industrial partners. The technology was developed within a project funded by the Fraunhofer Gesellschaft.

Fraunhofer FEP at the SID Display Week 2016
Talk
»OLED Microdisplays: Enabling Advanced Near-to-Eye Displays, Sensors, and Beyond«
Dr. Uwe Vogel, Session 52: OLED Displays II (Paper Number 52.2)
May 26, 2016, San Francisco Moscone Convention Center, Room 131

Exhibitor Forum
»Electron Beam Induced High-Resolution Modification of OLED Emission«
Elisabeth Bodenstein

Poster
»Electron Beam Induced High-Resolution Modification of OLED Emission«
Elisabeth Bodenstein, Poster number 208
May 26, 2016, San Francisco Moscone Convention Center, Room City View (Metreon)

Announcement
Fraunhofer FEP is pleased to be host of next SID ME 2017 Chapter Spring Meeting on March 13 – 14, 2017 in Dresden. First Call-for-Papers here:
www.fep.fraunhofer.de/sidme17

Press contact:

Annett Arnold
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP| Phone +49 351 2586 452 | Annett.Arnold@fep.fraunhofer.de
Winterbergstraße 28 | 01277 Dresden | Germany | www.fep.fraunhofer.de

Weitere Informationen:

http://s.fhg.de/88h

Annett Arnold | Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP

More articles from Information Technology:

nachricht World's thinnest hologram paves path to new 3-D world
18.05.2017 | RMIT University

nachricht Internet of things made simple: One sensor package does work of many
11.05.2017 | Carnegie Mellon University

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

Im Focus: Using graphene to create quantum bits

In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.

In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...

Im Focus: Bacteria harness the lotus effect to protect themselves

Biofilms: Researchers find the causes of water-repelling properties

Dental plaque and the viscous brown slime in drainpipes are two familiar examples of bacterial biofilms. Removing such bacterial depositions from surfaces is...

Im Focus: Hydrogen Bonds Directly Detected for the First Time

For the first time, scientists have succeeded in studying the strength of hydrogen bonds in a single molecule using an atomic force microscope. Researchers from the University of Basel’s Swiss Nanoscience Institute network have reported the results in the journal Science Advances.

Hydrogen is the most common element in the universe and is an integral part of almost all organic compounds. Molecules and sections of macromolecules are...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

Innovation 4.0: Shaping a humane fourth industrial revolution

17.05.2017 | Event News

Media accreditation opens for historic year at European Health Forum Gastein

16.05.2017 | Event News

 
Latest News

New approach to revolutionize the production of molecular hydrogen

22.05.2017 | Materials Sciences

Scientists enlist engineered protein to battle the MERS virus

22.05.2017 | Life Sciences

Experts explain origins of topographic relief on Earth, Mars and Titan

22.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>