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Issue 40, 2017
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A gradient engineered hole-transporting material for monolithic series-type large-area perovskite solar cells

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Abstract

Further efficiency enhancement mainly relies on decreasing the interface losses between the active layers in perovskite solar cells. The design of a gradient engineered hole-transporting material is expected to tune the interface losses in perovskite solar cells. In this work, we reported gradient engineering that afforded the hole-transport material (spiro-OMeTAD) dispersed in the upper part of the perovskite layer. Photoluminescence measurements indicated an enhanced hole extraction from the perovskite–spiro-OMeTAD gradient film. And a maximum PCE of 19.16% and a steady-state efficiency of 18.01% were obtained for the small-area device. Furthermore, we assembled monolithic series-type large-area perovskite solar cells based on gradient engineering. The large-area perovskite solar cell with an active area of 1.01 cm2 obtained a PCE of 16.61%. Moreover, monolithic series-type large-area perovskite solar cells showed a Voc of 2.095 V for the binary module and a Voc of 3.104 V for the ternary module, respectively.

Graphical abstract: A gradient engineered hole-transporting material for monolithic series-type large-area perovskite solar cells

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Publication details

The article was received on 05 May 2017, accepted on 18 Jul 2017 and first published on 18 Jul 2017


Article type: Paper
DOI: 10.1039/C7TA03890A
Citation: J. Mater. Chem. A, 2017,5, 21161-21168
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    A gradient engineered hole-transporting material for monolithic series-type large-area perovskite solar cells

    Y. Tu, J. Wu, X. He, P. Guo, T. Wu, H. Luo, Q. Liu, Q. Wu, J. Lin, M. Huang, Z. Lan and S. Li, J. Mater. Chem. A, 2017, 5, 21161
    DOI: 10.1039/C7TA03890A

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