Recent progress of Spectrolab high-efficiency space solar cells

Daniel C. Law, X. Q. Liu, J. C. Boisvert, E. M. Redher, C. M. Fetzer, S. Mesropian, R. R. King, K. M. Edmondson, B. Jun, R. L. Woo, D. D. Krut, P. T. Chiu, D. M. Bhusari, S. K. Sharma, N. H. Karam

Research output: Chapter in Book/Report/Conference proceedingConference contribution

15 Scopus citations

Abstract

High-efficiency Inverted Metamorphic (IMM) multi-junction solar cells are being developed at Spectrolab for use in space and near-space applications. Recently, large-area (26-cm2) IMM3J cells achieved a 1-sun, AM0 conversion efficiency of 32% with an open-circuit-voltage of 3.04 V, a short-circuit current-density of 16.7 mA/cm2, and a fill factor of 0.84. In addition, IMM4J cells (1-cm2) reached a 1-sun, AM0 conversion efficiency of 33%. The 4-junction cell achieved an open-circuit-voltage of 3.42 V, a short-circuit current-density of 15.8 mA/cm2, and a fill factor of 0.82. Both the inverted metamorphic 3J and 4J cells reveal excellent component subcell quantum efficiency. Improvements in crystal growth, as well as more optimal subcell current density balance, will further raise the 1-sun, AM0 efficiency of the 3J and the 4J IMM cells to 33% and 35% respectively. The latest status of the 72-cm2 XTJ (based on 150-mm Ge substrate) Supercells will also be discussed.

Original languageEnglish (US)
Title of host publicationProgram - 38th IEEE Photovoltaic Specialists Conference, PVSC 2012
Pages3146-3149
Number of pages4
DOIs
StatePublished - Nov 26 2012
Externally publishedYes
Event38th IEEE Photovoltaic Specialists Conference, PVSC 2012 - Austin, TX, United States
Duration: Jun 3 2012Jun 8 2012

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371

Other

Other38th IEEE Photovoltaic Specialists Conference, PVSC 2012
CountryUnited States
CityAustin, TX
Period6/3/126/8/12

Keywords

  • Ge-based lattice-matched solar cells
  • III-V multijunction
  • inverted metamorphic solar cells
  • space solar cells

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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  • Cite this

    Law, D. C., Liu, X. Q., Boisvert, J. C., Redher, E. M., Fetzer, C. M., Mesropian, S., King, R. R., Edmondson, K. M., Jun, B., Woo, R. L., Krut, D. D., Chiu, P. T., Bhusari, D. M., Sharma, S. K., & Karam, N. H. (2012). Recent progress of Spectrolab high-efficiency space solar cells. In Program - 38th IEEE Photovoltaic Specialists Conference, PVSC 2012 (pp. 3146-3149). [6318246] (Conference Record of the IEEE Photovoltaic Specialists Conference). https://doi.org/10.1109/PVSC.2012.6318246