A team of scientists established in Japan has a new record for the efficiency of power conversion based for all-organic solar cells, more than doubling the previous record. They say that the cell has been developed with rganic electrodes with a high conductivity that did not require acid doping or high temperature heating, which avoids damage to the plastic substrates.
A team led by scientists from Kanazawa University in Japan Haa developed a completely organic solar cell with a power conversion efficiency of 8.7%
The result doubles more than the power conversion efficiency of previously manufactured fully organic solar cells, which achieved around 4%.
In the research paper “High-performance unlocking in fully organic solar cells through the development of organic electrodes without treatment with acid and high temperature and its effective preparation for organic multi-layered films“Available in the magazine Advanced functional materials, The team explains that they have achieved the result by accepting two challenges in the development of such cells.
First they developed a transparent electrode based on conductive polymer -pedot: PSS that was manufactured at 80 degrees without using acids or bases. It showed sufficient conductivity, with a plate resistance of less than 70 Ω/SQ, for film cells of the film type.
The article explains that the earlier preparation of organic materials with high conductivity had required a high temperature, of more than 150 degrees, which can damage organic substrate films and organic semiconducting layers, leading to a reduction in the execution of the organic solar cell.
The team also developed a lamination method of carbon nanobuis electrodes, which they say has tackled the difficulty to stack multiple layers in the film type of solar cell device without damaging the underlying layers.
The lamination technique included the formation of electrodes separately on the barrier films of solar cells and then attaching it to the device, avoiding damage to the lower organic films during the manufacture of the electrode.
Image: Kanazawa University
In the research paper, the scientists explain that their completely organic solar cell does not contain Expensive transparent electrodes or vapor -dependent electrodes, and add that the cell can be completely manufactured using solution processes. They say that this indicates the relative sense of scaling up to create larger modules.
The researchers provide all-organic solar cells to keep a great promise for applications in environmentally sensitive areas, such as agricultural land and portable devices. The team now wants to further improve the performance of their manufactured cell by improving the conductivity of the organic electrodes.
The Kanazawa University team collaborated with scientists from Kyoto headquarters Reiko Co., LTD and Queen’s University in Canada, on the research project.
This content is protected by copyright and may not be reused. If you want to work with us and reuse part of our content, please contact: editors@pv-magazine.com.
Popular content
