Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Future solar panels

03.09.2014

IK4-Ikerlan and the UPV/EHU-University of the Basque Country are exploring the limits of organic solar cells and how to manufacture more efficient cells

Conventional photovoltaic technology uses large, heavy, opaque, dark silicon panels, but this could soon change. The IK4-Ikerlan research centre is working within the X10D European project with new materials to produce solar panels in order to come up with alternatives to the current panels. What is needed to improve the functioning of cells with a large surface are materials that cost less to produce and offer greater energy efficiency.


Module -to which two cells have been connected in series- powering a toy

(Source: IK4-Ikerlan).

The solar panels we see tend to be rigid and black. Organic photovoltaic technology, by contrast, enables more translucent and more flexible solar panels in a range of colours to be manufactured. But this technology needs to meet certain requirements if it is to be accepted on the market: greater efficiency, longer duration and low production cost. So this research has set out "to analyse the capacity new materials have to absorb solar energy as well as to seek appropriate strategies to move from the lab to actual operations," pointed out Ikerne Etxebarria, a researcher of the UPV/EHU and IK4-Ikerlan.

The research team has analysed what the maximum size is for the cells, which must have a large surface area, if they are to work properly.  Various cells with different structures and surfaces have been designed for this purpose. Once the results had been analysed, "we found that in cells of up to approximately 6 cm2 the power was in direct proportion to their surface area. On larger surface areas, however, the performance of the cells falls considerably," stressed Etxebarria, who has reached the following conclusion: to be able to manufacture cells with a large surface area it is necessary to build  modules, to which cells with a smaller surface will be connected in series or in parallel, on the substrate itself. 

To manufacture these modules, the layers existing between the electrodes need to be structured, in other words, the cells have to be connected to each other. "Until now, that structuring has been done mechanically or by means of laser but with the risk of damaging the substrate. However, in this research we have developed a new automatic structuring technique," she pointed out. This technique involves transforming the features of the surface of the substrate.

Aim: to improve efficiency
Another of the aims of this research was to find a way of manufacturing highly efficient cells. To do this, the first step was to optimize the production process of cells based on different polymers, in order to achieve the maximum efficiency of these materials; secondly, polymers that absorb light at different wavelengths have been used to produce cells with a tandem structure in order to make them more efficient. "Each polymer absorbs light at a different wavelength. The ideal thing would be to take advantage of all the sun's rays, but there is no polymer capable of absorbing the light at all the wavelengths. So to be able to make the most efficient use of the sunlight, one of the possibilities is to build tandem-type structures, in other words, to fit the cells manufactured with different polymers one on top of the other," explained Etxebarria. These tandem-type structures can be connected in series or in parallel. "We have seen that after many measurements greater efficiency is achieved in the cells installed in series than in the ones fitted in parallel," added the researcher.

The production of cells manufactured using polymers or new materials will be much more cost-effective, since these polymers are produced in the laboratory, unlike silicon that has to be mined. Etxebarria works in the laboratory of IK4-Ikerlan trying out different polymers in the quest for suitable materials for manufacturing cells. "We try out (different) materials in small devices," she pointed out. Many materials of many types are in fact tried out and the most efficient ones are selected, in other words, those that capture the most solar energy and which make the most of it.

Additional information
Ikerne Etxebarria-Zubizarreta is a Doctor of Chemical Engineering. She works at the IK4-Ikerlan research centre. She submitted her PhD thesis entitled "Mini-Modules and Tandem Organic Solar Cells: Strategies to improve device efficiency" at the UPV/EHU and written up under the supervision of Iñigo López-Arbeloa, lecturer in the UPV/EHU's Department of Physical Chemistry, and Roberto Pacios-Castro, an IK4-Ikerlan researcher.

Matxalen Sotillo | Eurek Alert!
Further information:
http://www.ehu.es/p200-hmencont/en/contenidos/noticia/20140901_ikerne_etxebarria/en_etxebarr/20140901_ikerne_etxebarria.html

Further reports about: Organic electrodes layers manufacture materials solar panels structures technique wavelengths

More articles from Materials Sciences:

nachricht Diamonds get more beautiful with laser lamps
16.04.2015 | Heraeus Noblelight GmbH

nachricht X-ray study images structural damage in lithium-ion batteries
15.04.2015 | Deutsches Elektronen-Synchrotron DESY

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Astronomers reveal supermassive black hole's intense magnetic field

Astronomers from Chalmers University of Technology have used the giant telescope Alma to reveal an extremely powerful magnetic field very close to a supermassive black hole in a distant galaxy

Astronomers from Chalmers University of Technology have used the giant telescope Alma to reveal an extremely powerful magnetic field very close to a...

Im Focus: A “pin ball machine” for atoms and photons

A team of physicists from MPQ, Caltech, and ICFO proposes the combination of nano-photonics with ultracold atoms for simulating quantum many-body systems and creating new states of matter.

Ultracold atoms in the so-called optical lattices, that are generated by crosswise superposition of laser beams, have been proven to be one of the most...

Im Focus: UV light robot to clean hospital rooms could help stop spread of 'superbugs'

Can a robot clean a hospital room just as well as a person?

According to new research out of the Texas A&M Health Science Center College of Medicine, that is indeed the case. Chetan Jinadatha, M.D., M.P.H., assistant...

Im Focus: Graphene pushes the speed limit of light-to-electricity conversion

Researchers from ICFO, MIT and UC Riverside have been able to develop a graphene-based photodetector capable of converting absorbed light into an electrical voltage at ultrafast timescales

The efficient conversion of light into electricity plays a crucial role in many technologies, ranging from cameras to solar cells.

Im Focus: Study shows novel pattern of electrical charge movement through DNA

Electrical charges not only move through wires, they also travel along lengths of DNA, the molecule of life. The property is known as charge transport.

In a new study appearing in the journal Nature Chemistry, authors, Limin Xiang, Julio Palma, Christopher Bruot and others at Arizona State University's...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

HHL's Entrepreneurship Conference on FinTech

13.04.2015 | Event News

World Conference On Regenerative Medicine 2015: Registration And Abstract Submission Now Open

25.03.2015 | Event News

University presidents from all over the world meet in Hamburg

19.03.2015 | Event News

 
Latest News

Engineer Improves Rechargeable Batteries with MoS2 Nano 'Sandwich'

17.04.2015 | Power and Electrical Engineering

Comparing Climate Models to Real World Shows Differences in Precipitation Intensity

17.04.2015 | Earth Sciences

A blueprint for clearing the skies of space debris

17.04.2015 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>