Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

European Research Alliance for the Simplified Production of Organic Solar Cells

09.11.2010
A new laser system is being developed to increase the effectivity of organic solar cells. A consortium under the leadership of the Laser Zentrum Hannover e.V. (LZH) is working on a tunable infrared laser system for the selective processing of organic layers in opto-electronical components.

A tunable infrared laser system for the selective processing of organic layers in opto-electronical components is the goal of the new research project IMPROV, which started in September, 2010. The EU has provided approximately 2.4 million Euros support from the 7th Framework Programme for the project, which will run until 2013. The Laser Zentrum Hannover e.V. (LZH) is coordinator of the project consortium, with seven partners from science and industry.

Organic photovoltaic solar cells (OSC) are made of thin layers of different photo-active polymer films. In order to produce a functional component, these layers must be, among other things, selectively structured. The UV lasers presently used for this process are not precise enough, which often leads to a 20% loss of the active area. With a new laser process – resonant infrared ablation, or RIA for short – this production step can be significantly improved. Due to the different absorption bands of each individual polymer film, RIA can be used for selective cutting, structuring or material removal within the whole layer system. In order to achieve this, a short pulsed laser in the infrared wavelength is used, which can be tuned exactly to the best suitable maximum absorption of the layers to be processed.

This is where the EU project IMPROV „Integrated Mid-infrared high Power source for Resonant ablation of Organic based photovoltaic devices“ comes in, in which a widely tunable, infrared short pulsed laser in the wavelength spectrum between 3 and 10 m is being developed. In order to achieve this, frequency conversion of a 2° µm system in an innovative, non-linear crystal (orientation-patterned gallium arsenide) is necessary.

The market potential for plastic micro-processing applications is enormous. The planned laser system could greatly simplify production process and significantly decrease area losses, especially for organic photovoltaics, (OPV), but also for organic light emitting diodes (OLED) and organic thin-film transistors (OTFT).

Dr. Dieter Wandt, head of the Ultrafast Photonics Group of the LZH, is the IMPROV coordinator. In this project, his group is responsible for developing a completely fiber-based, mode-coupled, ultra-short pulsed thulium fiber laser with tunable output radiation in the wavelength range of 2 µm. Additionally, the typical repetition rate of 40 to 60 MHz must be reduced to 1 MHz. The other partners from Belgium, Denmark and France will amplify the laser output in further thulium-doted fibers, and then convert the laser radiation to the infrared spectral range in optical parameter generators/amplifiers based on GaAs crystals

Dieter Wandt is conscious of with the difficulty facing the LZH. "There is hardly any research on 2µm thulium-based ultra-short pulse fiber lasers, and commercial optical components are nearly non-existent. Also, due to the wavelength range, there are no laser viewers." Nevertheless, the physicist is confident, since the LZH has already gathered experience with this kind of oscillator. Also, the LZH can make some of the fiber-based key components such as pump-light couplers, outcouplers, and filters themselves.

Project partners in IMPROV are, apart from the German firms BATOP und Heliatek, the Interuniversitair MicroeIectronica Centrum VZW (IMEC), as well as Multitel ASBL, NKT Photonics and Thales. Together they form the complete process chain, from development to industrial exploitation. Experiments using the laser system for the production of organic solar cells will be carried with the help of the the Heliatek GmbH in Dresden. Interest in the compact IR high-powered laser has also been shown by the plastic processing industry, where the excimer laser is usually used.

Contact:
Laser Zentrum Hannover e.V.
Michael Botts
Hollerithallee 8
D-30419 Hannover
Germany
Tel.: +49 511 2788-151
Fax: +49 511 2788-100
E-Mail: m.botts@lzh.de
The Laser Zentrum Hannover e.V. (LZH) carries out research and development in the field of laser technology and is supported by the Ministry of Economic Affairs, Labour and Transport of the State of Lower Saxony (Niedersächsisches Ministerium für Wirtschaft, Arbeit und Verkehr).

Michael Botts | Laser Zentrum Hannover e.V.
Further information:
http://www.lzh.de

More articles from Materials Sciences:

nachricht New approach to revolutionize the production of molecular hydrogen
22.05.2017 | Technische Universität Dresden

nachricht Photocatalyst makes hydrogen production 10 times more efficient
19.05.2017 | Kobe University

All articles from Materials Sciences >>>

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 >>>