| 摘要 |
A multijunction, monolithic, photovoltaic (PV) cell and device ( 600 ) is provided for converting radiant energy to photocurrent and photovoltage with improved efficiency. The PV cell includes an array of subcells ( 602 ), i.e., active p/n junctions, grown on a compliant substrate, where the compliant substrate accommodates greater flexibility in matching lattice constants to adjacent semiconductor material. The lattice matched semiconductor materials are selected with appropriate band-gaps to efficiently create photovoltage from a larger portion of the solar spectrum. Subcell strings ( 601, 603 ) from multiple PV cells are voltage matched to provide high output PV devices. A light emitting cell and device is also provided having monolithically grown red-yellow and green emission subcells and a mechanically stacked blue emission subcell.
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