Recently developed a dark environment can also generate electricity in photovoltaic cells Japan International Research Institute of cutting-edge technology.
The battery can by means of the human eye can not see the infrared light to generate electric power, less power consumption lighting emitting diode (LED) lamp. The Institute plans without power for emergency lighting lamps, etc. to seek the technology to practical use.
Waseda University professor Tetsuya Aisaka, who provide assistance. In the surface of the electrode paste crystal particles form a film-like photovoltaic cell, the naked eye can not see the crystal absorbs infrared light, and then transmitted to the dye, and then converted to electrical energy. Such electrical called “dye-sensitized” photovoltaic cell.
Team trial 7 cm square photovoltaic cells, even in the dark the human eye 14 lux (lux brightness display unit) environment, but also a small lighted LED lights. If the ambient brightness of 200 lux, the conversion efficiency will reach 18% or more.