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Efficacious engineering on charge extraction for realizing high-efficient perovskite solar cells

Abstract

Efficient extraction of photo-generated charge carriers is of significance in acquiring a high efficiency for perovskite solar cells. Herein, we provide a systematical strategy on effectively engineering the charge extraction in inverted structured pervoskite solar cells based on CH3NH3PbI3-xClx. The intentionally doped chlorine element to the pervoskite structure is helpful to get a high open circuit voltage. The engineering is carried out by modifying the Al cathode with zirconium acetylacetonate, doping the hole transport layer of NiOx with Cu and using a high-conductive FTO substrate. This improves the bandgap alignment of the whole device and thus is of high benefit for extracting the charge carriers by promoting the transport rate and reducing the trap states. An optimized power conversion efficiency of 20.5% is consequantly realized. Insights into how to extract charge carriers efficiently with a minimum energy loss are discussed.

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Publication details

The article was received on 19 Sep 2017, accepted on 13 Nov 2017 and first published on 13 Nov 2017


Article type: Paper
DOI: 10.1039/C7EE02685D
Citation: Energy Environ. Sci., 2017, Accepted Manuscript
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    Efficacious engineering on charge extraction for realizing high-efficient perovskite solar cells

    S. Yue, K. liu, R. XU, M. Li, M. Azam, K. Ren, J. Liu, Y. sun, Z. Wang, D. Cao, X. Yan, S. Qu, Y. Lei and W. zhanguo, Energy Environ. Sci., 2017, Accepted Manuscript , DOI: 10.1039/C7EE02685D

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