Gold-free Cu-metallized III-V solar cell

Ching Hsiang Hsu*, Hsun Jui Chang, Hung Wei Yu, Hong Quan Nguyen, Jer Shen Ma, Edward Yi Chang

*Corresponding author for this work

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

3 Scopus citations

Abstract

Au-free, fully Cu-metallized InGaP/InGaAs/Ge triple-junction solar cells using Pd/Ge/Cu as front contact and Pt/Ti/Pt/Cu/Cr as back contact were fabricated and the results are reported for the first time. From the specific contact resistance measurement, these Cu-metallized ohmic contacts have low contact resistance in the order of 10-6 Ω-cm2. AES and TEM results clearly show the formation mechanisms of the Cu-metallization ohmic structures, for Pd/Ge/Cu contact, it was due to the formation of Ge diffusion into the GaAs layer, and for the Pt/Ti/Pt/Cu/Cr contact, it was due to high work function of Pt layer, these copper metallized ohmic contacts were quite stable even after 310 °C annealing. The I-V curves of the Cu-metallized InGaP/InGaAs/Ge triple-junction solar cells showed similar electrical characteristics to the solar cells with Au-metallized triple junction solar cell. Overall, the Pd/Ge/Cu and Pt/Ti/Pt/Cu ohmic contacts have been successfully applied to the InGaP/InGaAs/Ge triple-junction solar cells and demonstrated excellent performance.

Original languageEnglish
Title of host publicationIEEE International Conference on Semiconductor Electronics, Proceedings, ICSE
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages336-338
Number of pages3
ISBN (Electronic)9781479957606
DOIs
StatePublished - 10 Oct 2014
Event11th IEEE International Conference on Semiconductor Electronics, ICSE 2014 - Kuala Lumpur, Malaysia
Duration: 27 Aug 201429 Aug 2014

Publication series

NameIEEE International Conference on Semiconductor Electronics, Proceedings, ICSE

Conference

Conference11th IEEE International Conference on Semiconductor Electronics, ICSE 2014
CountryMalaysia
CityKuala Lumpur
Period27/08/1429/08/14

Keywords

  • Copper-metallization
  • III-V solar cell
  • low-cost

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  • Cite this

    Hsu, C. H., Chang, H. J., Yu, H. W., Nguyen, H. Q., Ma, J. S., & Chang, E. Y. (2014). Gold-free Cu-metallized III-V solar cell. In IEEE International Conference on Semiconductor Electronics, Proceedings, ICSE (pp. 336-338). [6920866] (IEEE International Conference on Semiconductor Electronics, Proceedings, ICSE). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/SMELEC.2014.6920866