Enabling Technology Project
Photon Management and Optical Engineering
Outline of the area
Internationally considering the emission-reduction target, we focus on the R&D on lowering the energy loss in optics-based technologies that can contribute to the reduction of CO2 emission. We attempt to lower power consumption in liquid-crystal displays and lighting by suppressing unnecessary light and improving its directionality. In addition, we attempt to lower the energy loss and improve the efficiency of light-emitting diodes by optimizing their structure and materials. In this ALCA Enabling Technology project, we examine the germicidal lamp technology in addition to lighting. Moreover, via R&D on solar-cell materials and structures, we effectively utilize solar light and attempt to reduce CO2 emission by decreasing the electricity required for lighting.
More specifically, we investigate new technologies such as perovskite solar cells and tandem one. Moreover, we construct photovoltaic devices separately from photodetectors using laser transmission.
Spatially Imaged Iris Plane Ultra Low Power Consumption Display
Researcher, Tohoku university
A conventional display diffuses optical rays from screen or surface of display to free space. But only rays which pass through the pupil of human’s eyes are used. The most part of rays are not used. Our display gathers rays of displayed images near eyes of observer and horizontal area in which observers exist in a strong probability. Therefore the most part of rays are used.Consequently ultra high optical efficiency and ultra low power consumption are achieved.
Development of High Performance and Environmentally Friendly Perovskite Type Solar Cells
Professor, ICR, Kyoto University
The ultimate objective of this project is the generation of environmentally friendly high-performance perovskite-type solar cells. For this purpose, a series of promising Pb-free peroviskite-type semiconductors will be developed, whereby particular focus is placed on highly pure materials. Taking advantage of their intrinsic advantageous characteristics, i.e., low fabrication costs, light weight, and flexibility, it should be possible to establish such solar cells as an alternative renewable energy source, which would contribute substantially to the reduction of carbon emission levels and thus make society more sustainable.