Unraveling the exciton binding energy and the dielectric constant in single crystal methylammonium lead tri-iodide perovskite
| Autor: | Henry J. Snaith, Duncan K. Maude, Amir A. Haghighirad, Krzysztof Galkowski, Robin J. Nicholas, Paulina Plochocka, Zhuo Yang, Alessandro Surrente, Nicolas Bruyant |
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| Přispěvatelé: | Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
crystal lattice disorder
FOS: Physical sciences 02 engineering and technology Dielectric 010402 general chemistry 01 natural sciences Tetragonal crystal system chemistry.chemical_compound Condensed Matter::Materials Science Perovskites General Materials Science Physical and Theoretical Chemistry Triiodide ComputingMilieux_MISCELLANEOUS Perovskite (structure) Condensed Matter - Materials Science Condensed matter physics Materials Science (cond-mat.mtrl-sci) photoluminescence 021001 nanoscience & nanotechnology 3. Good health 0104 chemical sciences Magnetic field [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con] chemistry Orthorhombic crystal system Crystallite 0210 nano-technology Single crystal |
| Zdroj: | HAL Journal of Physical Chemistry Letters Journal of Physical Chemistry Letters, American Chemical Society, 2018 Journal of Physical Chemistry Letters, 2018 |
| ISSN: | 1948-7185 |
| Popis: | We have accurately determined the exciton binding energy and reduced mass of single crystals of methylammonium lead tri-iodide using magneto-reflectivity at very high magnetic fields. The single crystal has excellent optical properties with a narrow line width of $\sim 3$meV for the excitonic transitions and a 2s transition which is clearly visible even at zero magnetic field. The exciton binding energy of $16 \pm 2$meV in the low temperature orthorhombic phase is almost identical to the value found in polycrystalline samples, crucially ruling out any possibility that the exciton binding energy depends on the grain size. In the room temperature tetragonal phase, an upper limit for the exciton binding energy of $12 \pm 4$ meV is estimated from the evolution of 1s-2s splitting at high magnetic field. 5 pages, 4 figures |
| Databáze: | OpenAIRE |
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