Electrical properties and structural defects in lattice mismatched InGaAs solar cells

T. Sasaki, K. Arafune, H. S. Lee, N. J. Ekins-Daukes, S. Tanaka, W. Metzger, M. J. Romero, K. Jones, M. Al-Jassim, Y. Ohshita, M. Yamaguchi

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

1 Citation (Scopus)

Abstract

Higher conversion efficiency has been predicted theoretically for InGaP/In0.16Ga0.84As/Ge lattice-mismatched triple junction solar cells owing to widening of the effective range of the solar spectrum than the conventional lattice-matched solar cells. The most serious problem in lattice-mismatched system is the large lattice mismatch (∼1%) between In0.16Ga0.84As and Ge cells. The effect of a thermal cycle annealing (TCA) process which is expected to reduce the defect density in this system has been discussed from electrical and structural viewpoints. The minority carrier lifetime in In0.16Ga0.84As emitter layers were improved after TCA treatment from TR-PL measurement. EBIC measurements showed a reduction of the structural defect such as misfit dislocations due to the TCA process in In0.16Ga0.84As base layers. The misfit components observed in the base layers may have some influence through the emitter layers.

Original languageEnglish
Title of host publicationConference Record of the 2006 IEEE 4th World Conference on Photovoltaic Energy Conversion, WCPEC-4
PublisherIEEE Computer Society
Pages795-798
Number of pages4
ISBN (Print)1424400163, 9781424400164
DOIs
Publication statusPublished - 2006
Event2006 IEEE 4th World Conference on Photovoltaic Energy Conversion, WCPEC-4 - Waikoloa, HI, United States
Duration: 2006 May 72006 May 12

Publication series

NameConference Record of the 2006 IEEE 4th World Conference on Photovoltaic Energy Conversion, WCPEC-4
Volume1

Other

Other2006 IEEE 4th World Conference on Photovoltaic Energy Conversion, WCPEC-4
CountryUnited States
CityWaikoloa, HI
Period06/5/706/5/12

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry

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    Sasaki, T., Arafune, K., Lee, H. S., Ekins-Daukes, N. J., Tanaka, S., Metzger, W., Romero, M. J., Jones, K., Al-Jassim, M., Ohshita, Y., & Yamaguchi, M. (2006). Electrical properties and structural defects in lattice mismatched InGaAs solar cells. In Conference Record of the 2006 IEEE 4th World Conference on Photovoltaic Energy Conversion, WCPEC-4 (pp. 795-798). [4059749] (Conference Record of the 2006 IEEE 4th World Conference on Photovoltaic Energy Conversion, WCPEC-4; Vol. 1). IEEE Computer Society. https://doi.org/10.1109/WCPEC.2006.279576