Procedures for Evaluating Multijunction Concentrators

K. Emery, M. Meusel, R. Beckett, F. Dimroth, A. Bett, W. Warta

Research output: Contribution to conferencePaperpeer-review

69 Scopus Citations


Procedures at NREL and Fraunhofer ISE for evaluating multijunction cells are detailed with a triple-junction GaInP/GaAs/Ge concentrator cell designed and grown at Spectrolab and processed at NREL [1], and a tandem Fraunhofer ISE Ga0.35In0.65P/Ga0.63In0.17As [2] cell as examples. The one-sun efficiency and Isc for the triple-junction device measured at Fraunhofer ISE and NREL agreed within 0.2%, well below the ±6% uncertainty estimated by NREL. The procedures for determining the one-sun characteristics involve determining the quantum efficiency and using it for spectral correction during the I-V-characterization. The characteristics under concentration are evaluated with a flash simulator.

Original languageAmerican English
Number of pages5
StatePublished - 2000
Event28th IEEE Photovoltaic Specialists Conference, PVSC 2000 - Anchorage, United States
Duration: 15 Sep 200022 Sep 2000


Conference28th IEEE Photovoltaic Specialists Conference, PVSC 2000
Country/TerritoryUnited States

Bibliographical note

Publisher Copyright:
© 2000 IEEE.

NREL Publication Number

  • NREL/CP-520-28923


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