The unit set the record in the Research Area “Creative research for clean energy generation using solar energy” (Research Supervisor: Masafumi Yamaguchi, Principal Professor, Toyota Technological Institute Graduate School of Engineering) as part of the Core Research of Evolutional Science & Technology (CREST) program sponsored by the Japan Science and Technology Agency (JST).
The highest energy conversion efficiency in dye-sensitized solar cells had remained at 11.1% since 2006. However, in this research, the NIMS Photovoltaic Materials Unit succeeded in improving conversion efficiency to 11.4% by increasing both the cell short-circuit current density and open circuit voltage. This is the highest value was certified by the public test center (AIST, Japan).
This new world record for highest conversion efficiency in dye-sensitized solar cells was made possible by the development of a new additive material which is capable of fully demonstrating a dye-sensitizing effect. By applying this additive to dye-sensitized solar cells, it was possible to improve the external quantum efficiency of the cell in the visible light region by approximately 80% and obtain a large short-circuit current density. The open circuit voltage could also be improved simultaneously with this. The adoption of this additive, which is different from the conventional type, realized the new world record for conversion efficiency.
In the future, the Photovoltaic Materials Unit will investigate the effect of the additive on the state of dye adsorption on TiO2 and the mechanism of charge transfer in the cell in order to further improve the efficiency. The NIMS researchers are aiming at even higher conversion efficiency by developing a more effective materials based on this result.
This research achievement was announced at the 72nd Fall Meeting of the Japan Society of Applied Physics (JSAP) on August 29, 2011.
Mikiko Tanifuji | Research asia research news
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11.12.2017 | National Institute of Standards and Technology (NIST)
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Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
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The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
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With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
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An interdisciplinary group of researchers interfaced individual bacteria with a computer to build a hybrid bio-digital circuit - Study published in Nature Communications
Scientists at the Institute of Science and Technology Austria (IST Austria) have managed to control the behavior of individual bacteria by connecting them to a...
Physicists in the Laboratory for Attosecond Physics (run jointly by LMU Munich and the Max Planck Institute for Quantum Optics) have developed an attosecond electron microscope that allows them to visualize the dispersion of light in time and space, and observe the motions of electrons in atoms.
The most basic of all physical interactions in nature is that between light and matter. This interaction takes place in attosecond times (i.e. billionths of a...
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