Graphene can enhance semiconductor polymers charge transport

Researchers at the Swedish Umea University have shown that if you place semiconductors polymers on a layer of graphene, they transport electrical charges more efficiently than when the polymers are placed on a silicon substrate.

This discovery means that graphene can enable more efficient charge transport in organic electronics such as OLEDs or OPVs.

Interview with AIXTRON's biz-dev director as the company moves into large-scale OVPD equipment

Juergen Kreis photoGermany-based AIXTRON is a leading deposition equipment provider for the semiconductor industries - used for a wide range of applications, from LED to graphene deposition. For the OLED market, Aixtron is offering Organic Vapor Phase Deposition (OVPD) equipment (which was exclusively licensed to AIXTRON by Universal Display).

Juergen Kreis, AIXTRON's Director Business Development, was kind enough to update us on Aixtron's OLED business and answer a few questions we had on the company's technology. Juergen joined AIXTRON in 2010 as Director Business Development with special focus on the portfolio for organic material deposition solutions.

Q: Hello Juergen. Can you give us a short introduction to AIXTRON's OLED related products and services?

AIXTRON’s core expertise clearly is in the offering of proprietary process solutions for the deposition of organic thin-films, with OVPD (Organic Vapor Phase Deposition) and PVPD (Polymer Vapor Phase Deposition) being the core process technologies. As the fabrication of organic electronics requires many manufacturing steps, flawless integration of the respective processes into an automated material flow is essential.

Simulation and measurement expert Fluxim announces two product releases and two training events

Switzerland based Fluxim (an OLED-Info sponsor) , providing leading simulation and measurement technology to the OLED and solar cell industry, announces two product releases and two training events. Following is a sponsored message from Fluxim.

Fluxim is Launching SETFOS 4.0 with a New Light Scattering Module for Assessing the OLED Light Outcoupling Enhancement

After extended development and testing effort, Fluxim is going to release a new module of the simulator SETFOS in the beginning of June 2014 to simulate light scattering in OLEDs and solar cells. Fluxim believes that their customers can strongly take advantage from this major improvement as the new module makes it easy to quantify the impact of light outcoupling enhancement structures. Please write to to obtain further information today.

BASF and the National University of Singapore to jointly develop graphene for flexible OLEDs

BASF and the Graphene Research Centre (GRC) at the National University of Singapore announced a new partnership to develop the use of graphene in organic electronics devices - such as OLED devices and OPVs. The goal of this collaboration is to interface graphene films with organic electronic materials, with an aim to create more efficient and flexible lighting devices.

In this collaboration, the GRC will contribute its graphene knowledge (the synthesis and characterization of the graphene) while BASF is focused on organic materials. Of course BASF is also engaged with graphene research (for several years) and are looking to speed up their device development with this new partnership.

COMEDD and partners develop new organic printable transparent electrodes for flexible OLEDs and OPVs

The 3-year German project IMAGE (innovation printable electrode materials for high performance OLEDs and OPVs) has been successfully completed. The project partners (which include Fraunhofer COMEDD and Carnot MIB) demonstrated novel organic transparent electrodes, which are arranged on a backing film and enable flexible electronic components.

The performance of these electrodes was demonstrated using flexible OLEDs and OPVs. COMEDD explains that new electrodes could replace conventional transparent metal oxides, such as ITO - which is less cost effective and less flexible. COMEDD can now manufacture flexible organic devices using the new electrodes, and the project partners are looking for industry partners to commercialize this technology.

Fluxim updates its OLED/OPV simulation software and all-in-one measurement platform

Fluxim released a new version (3.4) of its setfos simulation software used to study OLEDs and OPVs. The new version 3.4 is a major improvement with respect to drift-diffusion modeling and light-outcoupling simulation. Some of the major improvements are:

  • Modeling of electrical impedance spectra in the presence of charge traps
  • Improved convergence for the steady-state drift-diffusion solver
  • Improved heterojunction interface model
  • Light extraction from arbitrary stacks of coherent and incoherent layers

The Holst Centre shows new flexible OLED demonstrators

The Holst Centre published a nice video showing some new flexible OLED demonstrators:

First up are a flexible OLED with an wireless sensor integrated into a fabric and a watch with a flexible OLED. There's also a cool demo that shows how you can iron a flexible OLED on a fabric - the OLED can withstand the high temperature without a problem. They also show how an OLED lighting can be used under water.

Fraunhofer IAP and MBraun develop an OLED lighting and OPV printing system

Researchers from the Fraunhofer IAP insitute, together with MBraun, developed a new production facility that can be used to print OLED panels and OPV cells. They say that the new system can be used to produce large sample panels. The Fraunhofer showed the "bus stop of the future" that includes both large OPVs and OLED displays:

The Fraunhofer released very little technical details. I think this process actually produces very large OLED (or OPV) pixels , so you can think of these as OLED lighting panels and not really displays. The researchers said that the system includes a robot that controls different printers - and this all is like a "huge" ink-jet printer.

Beneq's technical sales director explains the company's ALD-based OLED encapsulation technology

OLED Encapsulation is a very hot topic, especially for flexible OLEDs. Samsung and LG are already producing flexible OLEDs, but the search for better encapsulation technologies is still on. ALD, or Atomic Layer Deposition is one candidate for future deposition of OLED encapsulation. ALD is based on Chemical Vapor Deposition (CVD) that uses two vapors (gaseous) precursors which react on the substrate which creates a solid thin film. ALD works in relatively low temperatures which means it is suitable for all substrates including plastics.

One of the leaders in ALD is Finland's Beneq. Beneq developed an inorganic barrier film called nClear which is deposited using ALD. Beneq says that nClear provides "world class" barrier performance and can be deposited at temperatures well below 100 degrees Celsius. Beneq offers the TFS-600 (Gen-2.5, 500x400 mm) which is used for industrial-scale OLED encapsulation. Beneq's director of Technical sales, Mikko Soderlund, was kind enough to answer a few questions we had on the company's technology and business. Mikko is leading the application development and commercialization of ALD-based thin-film encapsulation technology for OLEDs. He has a PhD in Photonics from Helsinki University of Technology (2009).

New oligomer OLED molecule emits non-polarized light, to enable more efficient PLEDs

Researchers from the University of Utah, Bonn and Regensburg developed a new wagon-wheel (or rotelle-pasta) shaped OLED molecule that emits non-polarized (random) light.Those oligomers, or wrapped-up polymers may enable OLEDs more efficient than polymer based OLEDs (PLEDs).

The researchers explain that current poylmer OLED molecules (which are shaped like spaghetti pasta, to continue the same metaphore) emit polarized light. Some of that light get trapped inside the OLED device and this makes it less efficient. They say that up to 80% of the generated light may be trapped in the OLED because it is polarized.

Cambridge Isotope Laboratories - Deutreated Reagents and High-Purity Gases for OLEDsCambridge Isotope Laboratories - Deutreated Reagents and High-Purity Gases for OLEDs