Abstract
Photovoltaic structures on the basis of GaAs p–i–n junctions with a different number of In0.4Ga0.6As layers in the space-charge region forming quantum-confined objects are experimentally and theoretically investigated. For all structures, the dependences of the open-circuit voltage on the solar-irradiation concentration are analyzed. It is shown that the implantation of quantum objects leads to the dominance of recombination in them over recombination in the matrix, which manifests itself in a drop in the open-circuit-voltage. An increase in the number of In0.4Ga0.6As layers leads to a proportional increase in the recombination rate, which is expressed in a proportional increase in the “saturation” current and corresponds to the model proposed in the study.
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ACKNOWLEDGMENTS
The study was supported by the Russian Science Foundation, project no. 17-72-20146.We thank N.Kh. Timoshina for measuring the dependences of the open-circuit voltage on the solar-radiation multiplicity.
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Mintairov, M.A., Evstropov, V.V., Mintairov, S.A. et al. Recombination in GaAs p–i–n Structures with InGaAs Quantum-Confined Objects: Modeling and Regularities. Semiconductors 52, 1244–1248 (2018). https://doi.org/10.1134/S1063782618100135
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DOI: https://doi.org/10.1134/S1063782618100135