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Completing the picture of 2-(aminomethylpyridinium) lead hybrid perovskites : Insights into structure, conductivity behavior and optical properties

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2018

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Lermer, Claudia
Senocrate, Alessandro
Moudrakovski, Igor
Hatz, Anna-Katharina
Mayer, Peter
Pielnhofer, Florian
Jaser, Julian A.
Lotsch, Bettina V.
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https://doi.org/10.1021/acs.chemmater.8b01840
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Chemistry of Materials. 2018, 30(18), pp. 6289-6297. ISSN 0897-4756. eISSN 1520-5002. Available under: doi: 10.1021/acs.chemmater.8b01840

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Hybrid perovskites have evolved into an exciting materials platform supporting a wide variety of optoelectronic applications including solar cells and light-emitting devices. In spite of their rapid deployment in devices, a detailed understanding of their structure – property relationships is scarce. In this study, we comprehensively analyze the crystal and electronic structures, as well as thermal, optical and electronic properties of a series of 2-(aminomethylpyridinium) lead halides including the isotypic hybrid perovskites (C6H10N2)PbX4 (X = Cl, Br and I) and the hybrid compound (C6H10N2)6IPb5I21 · 3 H2O. The thermal transformation of (C6H10N2)6IPb5I21 · 3 H2O into (C6H10N2)PbI4 was studied by thermal analysis and powder X-ray diffraction und used to reverse engineer a synthesis route for phase-pure (C6H10N2)PbI4. The very broad PL emission of (C6H10N2)6IPb5I21 · 3 H2O is traced back to the largest octahedral distortion found in this compound amongst all studied 2-(aminomethylpyridinium) lead halides. We further find that (C6H10N2)PbI4 and (C6H10N2)6IPb5I21 · 3 H2O are mixed ionic-electronic conductors and identify the diffusing ionic species as iodine and protons, respectively, by combining solid-state NMR measurements with a.c. impedance spectroscopy and d.c. galvanos-tatic polarization measurements.

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ISO 690LERMER, Claudia, Alessandro SENOCRATE, Igor MOUDRAKOVSKI, Tobias SEEWALD, Anna-Katharina HATZ, Peter MAYER, Florian PIELNHOFER, Julian A. JASER, Lukas SCHMIDT-MENDE, Bettina V. LOTSCH, 2018. Completing the picture of 2-(aminomethylpyridinium) lead hybrid perovskites : Insights into structure, conductivity behavior and optical properties. In: Chemistry of Materials. 2018, 30(18), pp. 6289-6297. ISSN 0897-4756. eISSN 1520-5002. Available under: doi: 10.1021/acs.chemmater.8b01840
BibTex
@article{Lermer2018-09-25Compl-43172,
  year={2018},
  doi={10.1021/acs.chemmater.8b01840},
  title={Completing the picture of 2-(aminomethylpyridinium) lead hybrid perovskites : Insights into structure, conductivity behavior and optical properties},
  number={18},
  volume={30},
  issn={0897-4756},
  journal={Chemistry of Materials},
  pages={6289--6297},
  author={Lermer, Claudia and Senocrate, Alessandro and Moudrakovski, Igor and Seewald, Tobias and Hatz, Anna-Katharina and Mayer, Peter and Pielnhofer, Florian and Jaser, Julian A. and Schmidt-Mende, Lukas and Lotsch, Bettina V.}
}
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