29.5%-Efficient GaInP/GaAs Tandem Solar Cells

K. A. Bertness, Sarah R. Kurtz, D. J. Friedman, A. E. Kibbler, C. Kramer, J. M. Olson

Research output: Contribution to journalArticlepeer-review

278 Scopus Citations


We report on multijunction GaInP/GaAs photovoltaic cells with efficiencies of 29.5% at 1-sun concentration and air mass (AM) 1.5 global and 25.7% 1-sun, AM0. These values represent the highest efficiencies achieved by any solar cell under these illumination conditions. Three key areas in this technology are identified and discussed; the grid design, front surface passivation of the top cell, and bottom surface passivation of both cells. Aspects of cell design related to its operation under concentration are also discussed.

Original languageAmerican English
Pages (from-to)989-991
Number of pages3
JournalApplied Physics Letters
Issue number8
StatePublished - 1994

NREL Publication Number

  • NREL/JA-451-6210


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