Ziegler, Jonas D. and Lin, Kai-Qiang and Meisinger, Barbara and Zhu, Xiangzhou and Kober-Czerny, Manuel and Nayak, Pabitra K. and Vona, Cecilia and Taniguchi, Takashi and Watanabe, Kenji and Draxl, Claudia and Snaith, Henry J. and Lupton, John M. and Egger, David A. and Chernikov, Alexey (2022) Excitons at the Phase Transition of 2D Hybrid Perovskites br. ACS PHOTONICS, 9 (11). pp. 3609-3616. ISSN 2330-4022
Full text not available from this repository. (Request a copy)Abstract
2D halide perovskites are among intensely studied materials platforms profiting from solution-based growth and chemical flexibility. They feature exceptionally strong interactions among electronic, optical, as well as vibrational excitations and hold a great potential for future optoelectronic applications. A key feature for these materials is the occurrence of structural phase transitions that can impact their functional properties, including the electronic band gap and optical response dominated by excitons. However, to what extent the phase transitions in 2D perovskites alter the fundamental exciton properties remains barely explored so far. Here, we study the influence of the phase transition on both exciton binding energy and exciton diffusion, demonstrating their robust nature across the phase transition. These findings are unexpected in view of the associated substantial changes of the free carrier masses, strongly contrast broadly considered effective mass and drift-diffusion transport mechanisms, highlighting the unusual nature of excitons in 2D perovskites.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | EFFECTIVE MASSES; ENHANCEMENT; ABSORPTION; CARRIERS; ENERGY; 2D perovskites; excitons; phase transition; diffusion |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group John Lupton |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 16 Feb 2024 07:47 |
| Last Modified: | 16 Feb 2024 07:47 |
| URI: | https://pred.uni-regensburg.de/id/eprint/57964 |
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