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. 2020 Sep 23;11:4814. doi: 10.1038/s41467-020-18655-7

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — a J–V characteristics of CQD PVs with different HTLs under AM 1.5 illumination with 1100-nm cutoff silicon filter. b EQE spectra of CQD PVs with different HTLs beyond 1100 nm. c Statistics of device performance with different HTLs using 1100-nm cutoff silicon filter. d MPP stability of unencapsulated CQD PVs with BA HTL and EDT HTL under continuous 1-sun illumination and nitrogen flow. e J–V characteristics and f EQE spectra of perovskite front cell and CQD back cell with BA HTL in the 4T tandem configuration.