Multijunction Solar Cell Substrate

A diffused photoactive junction in the germanium silicon substrate.

Multijunction solar cell substrate.

A solar cell comprising a bulk germanium silicon growth substrate. The strength of the bond will be characterized. Multi junction mj solar cells are solar cells with multiple p n junctions made of different semiconductor materials each material s p n junction will produce electric current in response to different wavelengths of light the use of multiple semiconducting materials allows the absorbance of a broader range of wavelengths improving the cell s sunlight to electrical energy conversion efficiency. And a sequence of subcells grown over the substrate with the first grown subcell either being lattice matched or.

The polyimide substrate serves as a permanent lightweight and flexible carrier for the thin multijunction solar cell for space applications. Multijunction solar cells based on iii v materials gallium arsenide gaas aluminum indium phosphide alinp aluminum gallium indium phosphide algainp gallium indium phosphide gainp and indium phosphide inp etc show high efficiency exceeding 35 but due to the high production cost and low availability of their constituents these solar cells are not considered suitable for cost. For the first time an efficiency of 25 9 percent has been achieved with a multi junction solar cell grown directly on a silicon substrate. The thin epi layer is transferred to the polyimide wafer.

Multijunction solar cells on bulk gesi substrate mar 13 2020 solaero technologies corp. A central stage in the development of economic solutions for the industrial use of multi junction solar cells for power generation has been reached.