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Issue 39, 2017
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Efficient and thermally stable inverted perovskite solar cells by introduction of non-fullerene electron transporting materials

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Abstract

Highly efficient and thermally stable inverted CH3NH3PbI3 (MAPbI3) and HC(NH2)2PbI3−xBrx (FAPbI3−xBrx) perovskite planar solar cells are demonstrated by using a N,N′-bis(phenylmethyl)naphthalene-1,4,5,8-tetracarboxylic diimide (NDI-PM)-based electron transporting material (ETM) instead of a conventional fullerene-based phenyl-C61-butyric acid methyl ester (PCBM) ETM. The MAPbI3 and FAPbI3−xBrx devices with the NDI-PM-based ETM exhibit 18.4% and 19.6% power conversion efficiency under an illumination of 1 Sun (100 mW cm−2), respectively, which are comparable to the efficiency of PCBM ETM-based ones (18.9% and 20.0%). The improved thermal stability of NDI-based perovskite solar cells is attributed to much stronger hydrogen bonds in the NDI-PM molecular crystals than the PCBM crystals.

Graphical abstract: Efficient and thermally stable inverted perovskite solar cells by introduction of non-fullerene electron transporting materials

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Publication details

The article was received on 04 Aug 2017, accepted on 12 Sep 2017 and first published on 13 Sep 2017


Article type: Communication
DOI: 10.1039/C7TA06900F
Citation: J. Mater. Chem. A, 2017,5, 20615-20622
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    Efficient and thermally stable inverted perovskite solar cells by introduction of non-fullerene electron transporting materials

    J. H. Heo, S. Lee, S. Jung, O. Kwon and S. H. Im, J. Mater. Chem. A, 2017, 5, 20615
    DOI: 10.1039/C7TA06900F

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