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Instability in CH3NH3PbI3 perovskite solar cells due to elemental migration and chemical composition changes.

ABSTRACT: Organic-inorganic halide perovskites have rapidly grown as favorable materials for photovoltaic applications, but accomplishing long-term stability is still a major research problem. This work demonstrates a new insight on instability and degradation factors in CH3NH3PbI3 perovskite solar cells aging with time in open air. X-ray photoelectron spectroscopy (XPS) has been used to investigate the compositional changes caused by device degradation over the period of 1000?hrs. XPS spectra confirm the migration of metallic ions from the bottom electrode (ITO) as a key factor causing the chemical composition change in the perovskite layer besides the diffusion of oxygen. XPS results are in good agreement with the crystallographic marks. Glow discharge optical emission spectrometry (GD-OES) has also been performed on the samples to correlate the XPS results. Based on the experimental results, fundamental features that account for the instability in the perovskite solar cell is discussed.

SUBMITTER: Ahmad Z 

PROVIDER: S-EPMC5684397 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature

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Instability in CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> perovskite solar cells due to elemental migration and chemical composition changes.

Ahmad Zubair Z   Najeeb Mansoor Ani MA   Shakoor R A RA   Alashraf Abdulla A   Al-Muhtaseb Shaheen A SA   Soliman Ahmed A   Nazeeruddin M K MK  

Scientific reports 20171113 1

Organic-inorganic halide perovskites have rapidly grown as favorable materials for photovoltaic applications, but accomplishing long-term stability is still a major research problem. This work demonstrates a new insight on instability and degradation factors in CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> perovskite solar cells aging with time in open air. X-ray photoelectron spectroscopy (XPS) has been used to investigate the compositional changes caused by device degradation over the period of  ...[more]

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