35.8% space and 38.8% terrestrial 5J direct bonded cells

P. T. Chiu, D. C. Law, R. L. Woo, S. B. Singer, D. Bhusari, W. D. Hong, A. Zakaria, J. Boisvert, S. Mesropian, R. R. King, N. H. Karam

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

78 Scopus citations

Abstract

Spectrolab has fabricated a direct semiconductor bonded space solar cell with an efficiency of 35.8% under the AM0 space spectrum. Using a similar technology, Spectrolab has achieved a 5-junction (5J) direct bonded terrestrial cell with a record efficiency of 38.8% under the one-sun AM1.5G terrestrial spectrum. Efforts to further improve the 5J cell efficiency have focused on development of the top 3 junctions (T3J) grown on GaAs. Experiments with top 3J isotype cells have yielded an improvement of 1% in current and 100 mV in voltage for the T3J. Spectrolab has also made significant improvements in its direct bonding process. The improved process has increased bond strengths by more than a factor of 5 and eliminated issues with large voids.

Original languageEnglish (US)
Title of host publication2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages11-13
Number of pages3
ISBN (Electronic)9781479943982
DOIs
StatePublished - Oct 15 2014
Externally publishedYes
Event40th IEEE Photovoltaic Specialist Conference, PVSC 2014 - Denver, United States
Duration: Jun 8 2014Jun 13 2014

Publication series

Name2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014

Other

Other40th IEEE Photovoltaic Specialist Conference, PVSC 2014
CountryUnited States
CityDenver
Period6/8/146/13/14

Keywords

  • direct bonding
  • multijunction cells
  • semiconductor bonding
  • wafer bonding

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Fingerprint Dive into the research topics of '35.8% space and 38.8% terrestrial 5J direct bonded cells'. Together they form a unique fingerprint.

  • Cite this

    Chiu, P. T., Law, D. C., Woo, R. L., Singer, S. B., Bhusari, D., Hong, W. D., Zakaria, A., Boisvert, J., Mesropian, S., King, R. R., & Karam, N. H. (2014). 35.8% space and 38.8% terrestrial 5J direct bonded cells. In 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014 (pp. 11-13). [6924957] (2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2014.6924957