[PV] world record solar cell with 44.7% efficiency

image © fraunhofer ISE  

독일 프라운호퍼 협회(ISE, soitec, CEA-leti, helmholtz center berlin)에서 CPV를 이용하여 태양광발전 효율을 44.7% 달성하였다. four solar subcell이라는 태양광셀의 새로운 구조를 이용하였다. CPV는 일사량이 풍부한 지역에서는 기존 PV보다 두 배의 효율을 기대할 수 있다. subcell은 다양한 파장대를 이용할 수 있게 III-V multi-junction 반도체 물질로 제작하였다. 

 the fraunhofer institute for solar energy systems ISE, soitec, CEA-leti and the helmholtz center berlin have achieved a new world record for the conversion of sunlight into electricity using a new solar cell structure with four solar subcells. a new record efficiency of 44.7% was measured at a concentration of 297 suns, indicating that 44.7% of the solar spectrum’s energy – from ultraviolet through to the infrared – is converted into electrical energy. these solar cells are used in concentrator photovoltaics (CPV), a technology which achieves more than twice the efficiency of conventional PV power plants in sun-rich locations. several cells made out of different III-V multi-junction semiconductor materials are stacked on top of each other causing the single subcells to absorb different wavelength ranges of the solar spectrum.   

external quantum efficiency of the four-junction solar cell

source - 

http://www.ise.fraunhofer.de/en/press-and-media/press-releases/presseinformationen-2013/world-record-solar-cell-with-44.7-efficiency?set_language=en