Split spectrum tandem cell

VI MONOLITHIC AND SPLIT SPECTRUM TANDEM CELL SYSTEMS... 

The super-efficient, super thin cells described in the preceding section can of course stand alone as the building blocks of solar arrays. However, they can be used as elements in tandem cell systems. There are three principle ways in which they can be assembled to form such systems. In the first method, illustrated in Fig. 2, the cells are placed one over the other but they are electrically isolated so that each bandgap cell is connected to a separate load. Optical losses at the interfaces can be reduced by using a split spectrum system like that shown schematically in Fig. 16. [23] Here mirror M reflects that portion of sunlight which can be used by cell C, the largest E cell in this three cell tandem system. The dichroic mirror M ... 

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