Printed solar cells on paper

A 15x15 cm solar module consists of multiple strips (in this case four) of photovoltaic cells. These printed photovoltaic modules are combined via snap fasteners and form a series connection. At the two ends of the serial connection, a connector cable is attached. The front of the module consists of the active layer composition. On the back paper, the substrate is directly visible. Photo: pmTUC/Bystrik Trnovec<br>

These days, everyone talks about the use of solar energy for the generation of electricity. Conventional solar cells, however, use expensive materials and are manufactured under costly clean room conditions. Consequently, they can only deliver expensive electricity. Researchers at Chemnitz University of Technology have now presented solar panels that are printed on paper.

The technology known as 3PV (3PV stands for printed paper photovoltaics) uses conventional printing methods and standard substrates, like those used for magazines, posters or packaging. Special inks with electrical properties form the necessary structures on paper, which ensure that electricity is generated when being exposed to light. Since the employed conventional printing methods, i.e. gravure, flexo and offset printing, are very cost-efficient, the printed solar panels shall generate much cheaper electricity in comparison to conventional solar cells.

Prof. Dr. Arved Hübler from the Institute for Print and Media Technology at Chemnitz University of Technology, who is working together with his research team on the 3PV technology for more than three years now, speaks of a paradigm shift in solar technology. His vision for the future is that common printing houses around the world could produce and market 3PV solar panels.

Now the Chemnitz-based researchers have published their results in the journal Advanced Energy Materials. Hübler and his team Tino Zillger, Bystrik Trnovec Mozzam Ali and Nora Wetzold, who have been supported by colleagues from the University of Würzburg with regard to the characterisation of the cells, report that the cells printed in Chemnitz achieve an energy conversion efficiency of 1.3 percent. The researchers use a new material approach. In a special printing process, naturally oxidised zinc is applied as base electrode. The transparent counter electrode is printed with PEDOT, a conductive polymer. “The materials are constantly optimised and we are confident that the 3PV parameters can be further improved,” says Tino Zillger, researcher at the Institute for Print and Media Technology and leader of the project. Even the team of Hübler is a bit surprised that it is already possible to produce very stable 3PV modules with a web printing press in the laboratory of the Institute for Print and Media Technology. “Our long experience in the field of printed electronics pays well here,” says the head of the chair Print Media Technology.

Hübler assumes that all in all paper solar cells could have the edge over the current technological state of the art due to the efficient production and lower material costs. The aim of further research is to increase the efficiency to more than five percent in order to ensure that a 3PV module is economically attractive despite a life time of less than one year. “In nature we find a model for this strategy: even green leaves only have a moderate energy conversion efficiency of four to seven percent and a life time of less than one year. Nevertheless, this approach is obviously successful,” explains Hübler.

The vision of being able to contribute to the overall energy supply with the help of paper solar panels is only one field of application. Researchers at Chemnitz University of Technology have already shown that it is also possible to drive small electrical devices with these paper solar cells. This opens up the possibility to supply mobile devices with “paper power” in a simple and self-sustaining way. Intelligent packaging, for instance, could include many additional features, ranging from displays to sensors. Handling of the paper solar cells can be very simple. Tino Zillger shows a possible solution with 3PV modules manufactured at the Institute for Print and Media Technology: The paper strips can be connected with the help of commercial snap fasteners. Immediately, an electrical current flows. After use, the paper modules can be recycled like any other waste paper. According to Hübler it is, thus, not only possible to generate renewable energy, but also the solar cell itself is made from renewable resources and is consequently renewable.

The publication is available online: Arved Hübler, Bystrik Trnovec, Tino Zillger, Mozzam Ali, Nora Wetzold, Markus Mingebach, Alexander Wagenpfahl, Carsten Deibel, Vladimir Dyakonov: Printed paper photovoltaic cells; Adv. Energy Mat. in print, pre-published at: http://onlinelibrary.wiley.com/doi/10.1002/aenm.201100394/abstract

More information can be found at http://www.pppv.de and is provided by Prof. Dr. Arved Hübler, phone 0371 531-32364, Email pmhuebler@mb.tu-chemnitz.de.

Media Contact

Katharina Thehos Technische Universität Chemnitz

All latest news from the category: Power and Electrical Engineering

This topic covers issues related to energy generation, conversion, transportation and consumption and how the industry is addressing the challenge of energy efficiency in general.

innovations-report provides in-depth and informative reports and articles on subjects ranging from wind energy, fuel cell technology, solar energy, geothermal energy, petroleum, gas, nuclear engineering, alternative energy and energy efficiency to fusion, hydrogen and superconductor technologies.

Back to home

Comments (0)

Write a comment

Newest articles

Lighting up the future

New multidisciplinary research from the University of St Andrews could lead to more efficient televisions, computer screens and lighting. Researchers at the Organic Semiconductor Centre in the School of Physics and…

Researchers crack sugarcane’s complex genetic code

Sweet success: Scientists created a highly accurate reference genome for one of the most important modern crops and found a rare example of how genes confer disease resistance in plants….

Evolution of the most powerful ocean current on Earth

The Antarctic Circumpolar Current plays an important part in global overturning circulation, the exchange of heat and CO2 between the ocean and atmosphere, and the stability of Antarctica’s ice sheets….

Partners & Sponsors