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. 2016 May 23;11:266. doi: 10.1186/s11671-016-1457-y

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© Zheng et al. 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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.

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Fig. 4 — a Structure of the quantum dots in a fence barrier (DEFENCE) solar cell. Reprinted with permission from Ref. [62] Copyright (2007) American Chemical Society. b Time evolution of carrier lifetime for the two samples with type II band structures. Excitation intensity is 38 mW/cm². Reprinted from Ref. [77] with the permission of AIP Publishing