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Issue 11, 2016
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Ultrathin Cu2O as an efficient inorganic hole transporting material for perovskite solar cells

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Abstract

We demonstrate that ultrathin P-type Cu2O thin films fabricated by a facile thermal oxidation method can serve as a promising hole-transporting material in perovskite solar cells. Following a two-step method, inorganic–organic hybrid perovskite solar cells were fabricated and a power conversion efficiency of 11.0% was achieved. We found that the thickness and properties of Cu2O layers must be precisely tuned in order to achieve the optimal solar cell performance. The good performance of such perovskite solar cells can be attributed to the unique properties of ultrathin Cu2O, including high hole mobility, good energy level alignment with CH3NH3PbI3, and longer lifetime of photo-excited carriers. Combining the merits of low cost, facile synthesis, and high device performance, ultrathin Cu2O films fabricated via thermal oxidation hold promise for facilitating the developments of industrial-scale perovskite solar cells.

Graphical abstract: Ultrathin Cu2O as an efficient inorganic hole transporting material for perovskite solar cells

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Publication details

The article was received on 05 Nov 2015, accepted on 15 Feb 2016 and first published on 18 Feb 2016


Article type: Paper
DOI: 10.1039/C5NR07758C
Citation: Nanoscale, 2016,8, 6173-6179
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    Ultrathin Cu2O as an efficient inorganic hole transporting material for perovskite solar cells

    W. Yu, F. Li, H. Wang, E. Alarousu, Y. Chen, B. Lin, L. Wang, M. N. Hedhili, Y. Li, K. Wu, X. Wang, O. F. Mohammed and T. Wu, Nanoscale, 2016, 8, 6173
    DOI: 10.1039/C5NR07758C

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