Publikation:

Benzimidazolium Lead Halide Perovskites : Effects of Anion Substitution and Dimensionality on the Bandgap

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Datum

2016

Autor:innen

Lermer, Claudia
Harm, Sascha P.
Jaser, Julian
Kutz, Christopher
Mayer, Peter
Lotsch, Bettina V.

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http://nbn-resolving.de/urn:nbn:de:bsz:352-0-390101
DOI (zitierfähiger Link)
https://doi.org/10.1002/zaac.201600371
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Open Access-Veröffentlichung
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Physik: Publikationen
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Zeitschrift für anorganische und allgemeine Chemie. 2016, 642(23), pp. 1369-1376. ISSN 0044-2313. eISSN 1521-3749. Available under: doi: 10.1002/zaac.201600371

Zusammenfassung

We present the synthesis and structural characterization of a series of benzimidazolium-based lead halide perovskites including (C7H7N2)2PbCl4, (C7H7N2)2PbBr4, (C7H7N2)2PbI4, and (C7H7N2)PbI3, which serves as a platform to investigate the change in optical properties as a function of the halide and the dimensionality of the inorganic sublattice. The structural similarity of the layered systems with A2MX4 stoichiometry was verified by single-crystal X-ray diffraction and solid- state NMR spectroscopy. The optical properties were analyzed by absorption and photoluminescence (PL) measurements, confirming the decrease in bandgap when exchanging the chloride with its higher homologues Br and I. In addition, comparison of the layered compound (C7H7N2)2PbI4 with the known compound (C7H7N2)PbI3 reveals an increase in bandgap on going from a 2D to a dimensionally reduced 1D topology. Besides, significant differences in the PL spectra of the halides are observed, which likely are due to recombination of self-trapped excitons stabilized through lattice distortions or permanent lattice defects in the compounds featuring broad PL emission bands.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
530 Physik

Schlagwörter

Hybrid perovskites, Layered compounds, Organic-inorganic hybrid composites, Photoluminescence, Optical properties

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ISO 690LERMER, Claudia, Sascha P. HARM, Susanne T. BIRKHOLD, Julian JASER, Christopher KUTZ, Peter MAYER, Lukas SCHMIDT-MENDE, Bettina V. LOTSCH, 2016. Benzimidazolium Lead Halide Perovskites : Effects of Anion Substitution and Dimensionality on the Bandgap. In: Zeitschrift für anorganische und allgemeine Chemie. 2016, 642(23), pp. 1369-1376. ISSN 0044-2313. eISSN 1521-3749. Available under: doi: 10.1002/zaac.201600371
BibTex
@article{Lermer2016Benzi-37035,
  year={2016},
  doi={10.1002/zaac.201600371},
  title={Benzimidazolium Lead Halide Perovskites : Effects of Anion Substitution and Dimensionality on the Bandgap},
  url={http://onlinelibrary.wiley.com/doi/10.1002/zaac.201600371/full},
  number={23},
  volume={642},
  issn={0044-2313},
  journal={Zeitschrift für anorganische und allgemeine Chemie},
  pages={1369--1376},
  author={Lermer, Claudia and Harm, Sascha P. and Birkhold, Susanne T. and Jaser, Julian and Kutz, Christopher and Mayer, Peter and Schmidt-Mende, Lukas and Lotsch, Bettina V.}
}
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http://onlinelibrary.wiley.com/doi/10.1002/zaac.201600371/full

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