Hysteretic Piezochromism in a Lead Iodide-Based Two-Dimensional Inorganic–Organic Hybrid Perovskite
Two-dimensional inorganic-organic hybrid perovskites are in the limelight due to their potential applications in photonics and optoelectronics. They are environmentally stable, and their various chemical compositions offer a wide range of bandgap energies. Alternatively, crystal deformation enables in situ control over their optical properties. Here, we investigate (C<sub>6</sub>H<sub>9</sub>C<sub>2</sub>H<sub>4</sub>NH<sub>3</sub>)<sub>2</sub>PbI<sub>4</sub>, a hybrid perovskite whose organic linkers are 2-(1-cyclohexenyl)ethylammonium. Pressure-dependent optical absorption and emission spectroscopy reveal a hysteretic piezochromism that was not reported for other lead iodide-based 2D perovskites. We combine our optical studies with high-pressure X-ray diffraction experiments and first-principles calculations to demonstrate that the deformation of the inorganic lead iodide layers is the main reason for the observed changes in the optical bandgap.
Authors
- Thorsten Deilmann (ORCID: https://orcid.org/0000-0003-4165-2446)
- Carmen Sanchez‐Valle (ORCID: https://orcid.org/0000-0001-5046-1612)
- Paul Steeger (ORCID: https://orcid.org/0000-0001-5672-0312)
- G. Vijaya Prakash (ORCID: https://orcid.org/0000-0003-0450-3767)
- Efim Kolesnikov
- Steffen Michaelis de Vasconcellos (ORCID: https://orcid.org/0000-0003-3584-0635)
- Theresa Block (ORCID: https://orcid.org/0000-0001-6487-5875)
- Jutta Kösters (ORCID: https://orcid.org/0000-0003-1233-5900)
- Rudolf Bratschitsch (ORCID: https://orcid.org/0000-0002-2368-2548)
- Mohammad Adnan (ORCID: https://orcid.org/0000-0002-8496-1583)
- Ilya Kupenko (ORCID: https://orcid.org/0000-0003-3783-8360)
- Michael Hanfland (ORCID: https://orcid.org/0000-0002-8904-5461)
- Robert Schmidt (ORCID: https://orcid.org/0000-0002-8856-3347)
- Xiang Li (ORCID: https://orcid.org/0000-0003-3259-1784)
- Susanne Müller (ORCID: https://orcid.org/0009-0007-6099-4333)
- Katarzyna Skrzyńska (ORCID: https://orcid.org/0000-0001-5816-9958)
Institutions
- University of Münster (DE)
- European Synchrotron Radiation Facility (FR)
- CeNTech (DE)
- Indian Institute of Technology Delhi (IN)
- University of Silesia in Katowice (PL)
Publication Details
- Journal
- Journal of the American Chemical Society
- Published
- 2024-08-09
- DOI
- https://doi.org/10.1021/jacs.4c05557
- Citations
- 12
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 2.50
Funders
- Alexander von Humboldt-Stiftung
- Deutsche Forschungsgemeinschaft
- European Synchrotron Radiation Facility
- Gauss Centre for Supercomputing