Sharp developed a photoelectric conversion rate of 37.9% of the solar cell

Japan leading solar plant Sharp (Sharp) 24 issued a press release to announce that has developed a photoelectric conversion rate of the world's highest level of compound 3-junction solar cell Cell (of Triple-JunctionCompound Solar Cell), its conversion rate up to 37.9% (conversion rate) of the R & D stage.

Sharp said compound solar cell differs from the current mainstream silicon solar cell material, but a compound consisting of indium and other elements of two or more kinds as the material forming the light absorbing layer (photo-absorption layer) having a high slew rate The Photovoltaic Panels generally used in satellites. Sharp plans to utilize the R & D results, use extended to the the HCPV system or car.

Since 2000, Sharp began the development of the light-absorbing layer stacked three-layer (upper, middle, bottom) to improve the conversion rate of the compound 3-junction solar cells, after in December 2012, the conversion rate increased to 37.7% of the further increased to the level of 37.9%. Even if the case of rainy weather, the latest research and development of solar lights can be lit for more than 5 days. Yesterday, the private enterprises in Shunde Jiaxin Lighting invested 20 million yuan hand in the Chinese Academy of Sciences set up a joint research and development of solar grid tie inverter lighting technology center, the two sides will be the key technology research of photovoltaic power generation, solar street lights intelligent control.

It is reported that with ordinary solar street lights, the Schwab lighting jointly developed by the Chinese Academy of Sciences intelligent control circuit system through the switch device, according to the brightness of the sky and individuals 24 hours a day in a variety of environments to automatically adjust the brightness. At the same time, the system can also be assigned to the proportion of solar regulator power for lighting and storage, and then graded according to the brightness of the street lamp discharge, fully charge the battery to ensure that the lights in a sunny day, and can be used in the rainy days, do not result in waste , and thus more energy efficient.

The person in charge of the Chinese Academy of Sciences, at present, the largest solar cell utilization rate of approximately 80%, through the MPPT maximum power point tracking technology to optimize the utilization rate up to 95%. Such as solar lamp charging day, can generally be lit for six or seven hours, and the adoption of new technology, the solar lamp lighting time can reach 15 hours or even longer. According to this principle, Schwab lighting and solar street lights developed by the Chinese Academy of Sciences, in rainy weather can generally be lit 3-5 days.