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. 2020 Apr 22;13(8):1958. doi: 10.3390/ma13081958

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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External quantum efficiency (EQE) curves of solar cells before (G, A) and after (G-EBI, A-EBI) electron beam irradiation: (a) EQE result of top subcells; (b) EQE result of middle subcells; (c) EQE result of bottom subcells.