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High-performance concentrator tandem solar cells based on IR-sensitive bottom cells

✍ Scribed by M.W. Wanlass; J.S. Ward; K.A. Emery; T.A. Gessert; C.R. Osterwald; T.J. Coutts

Publisher
Elsevier Science
Year
1991
Weight
556 KB
Volume
30
Category
Article
ISSN
0379-6787

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✦ Synopsis

Computer simulations of two-junction, concentrator tandem solar cell performance show that IR-sensitive bottom cells are required to achieve high efficiencies. Based on this conclusion, two novel concentrator tandem designs are under investigation: (1) a mechanically stacked, four-terminal GaAs/GaInAsP (0.95 eV) tandem, and (2) a monolithic, lattice-matched, three-terminal InP/GaInAs tandem. In preliminary experiments, terrestrial concentrator efliciencies exceeding 30% have been achieved with each of the above tandem designs. Methods for improving the efficiency of each tandem type are discussed.

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