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Highly efficient perovskite solar cells incorporating NiO nanotubes: increased grain size and enhanced charge extraction

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Abstract

Perovskite solar cells (PSCs) have greatly improved through optimizing the morphology and charge extraction of the perovskite film. To increase the efficiency, we have developed a new method of adding NiO nanotubes (NTs) to the perovskite precursor solution. The NiO NTs promoted the growth of perovskite grains during annealing and facilitated charge extraction. The increase in the grain size improved the crystallinity of the perovskite film and reduced the grain boundaries that could trap charge. Additionally, the NiO NTs located between the grain boundaries transferred holes, which prevented charge recombination. The efficiency of the PSCs increased due to the improved crystallinity and charge extraction of the perovskite film. Devices incorporating the NiO NTs exhibited power conversion efficiencies of 19.3 and 12.82% for planar-type and carbon-based PSCs, respectively.

Graphical abstract: Highly efficient perovskite solar cells incorporating NiO nanotubes: increased grain size and enhanced charge extraction

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Publication details

The article was received on 27 Jun 2017, accepted on 19 Sep 2017 and first published on 19 Sep 2017


Article type: Paper
DOI: 10.1039/C7TA05560A
Citation: J. Mater. Chem. A, 2017, Advance Article
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    Highly efficient perovskite solar cells incorporating NiO nanotubes: increased grain size and enhanced charge extraction

    J. Yun, J. Jun, H. Yu, K. Lee, J. Ryu, J. Lee and J. Jang, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA05560A

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