Improvement of radiation resistance of multijunction solar cells by application of Bragg reflectors

V. Emelyanov; N. Kaluzhniy; S. Mintairov; M. Shvarts; V. Lantratov

doi:10.1117/12.853750

26 February 2010 Improvement of radiation resistance of multijunction solar cells by application of Bragg reflectors

V. Emelyanov, N. Kaluzhniy, S. Mintairov, M. Shvarts, V. Lantratov

Proceedings Volume 7521, International Conference on Micro- and Nano-Electronics 2009; 75210D (2010) https://doi.org/10.1117/12.853750
Event: International Conference on Micro- and Nano-Electronics 2009, 2009, Zvenigorod, Russian Federation

Abstract

Feasibilities to increase the radiation resistance of multijunction solar cells in using Bragg reflectors have been shown, and also the solar cell structure optimum parameters and the optical reflector design have been chosen. Spectral characteristics and photocurrent values of single- and multi-junction SCs with and without Bragg reflectors at different Ga(In)As subcell thicknesses have been simulated. The dependencies of the solar cell photocurrent on the minority charge carrier diffusion length in the Ga(In)As subcell base at different subcell thicknesses have been investigated for structures both with and without Bragg reflectors. A good fit of the calculated dependencies to the experimental ones have been obtained. Two designs of Bragg reflectors for multijunction solar cells have been proposed, which allow ensuring in the Ga(In)As subcell base an effective collection of minority charge carriers at the decrease of their diffusion length caused by radiation treatment.

Citation Download Citation

V. Emelyanov, N. Kaluzhniy, S. Mintairov, M. Shvarts, and V. Lantratov "Improvement of radiation resistance of multijunction solar cells by application of Bragg reflectors", Proc. SPIE 7521, International Conference on Micro- and Nano-Electronics 2009, 75210D (26 February 2010); https://doi.org/10.1117/12.853750

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