Single-crystal microplates of two-dimensional organic–inorganic lead halide layered perovskites for optoelectronics
- 1.3k Downloads
Organic–inorganic hybrid perovskites attract considerable attention owing to their applications in high-efficiency solar cells and light emission. Compared with three-dimensional perovskites, two-dimensional (2D) layered hybrid perovskites have a higher exciton binding energy and potentially higher light-emission efficiency. The growth of high-quality crystalline 2D perovskites with a well-defined nanoscale morphology is desirable because they can be suitable building blocks for integrated optoelectronics and (nano)photonics. Herein, we report the facile solution growth of single-crystal microplates of 2D perovskites based on a 2-phenylethylammonium (C6H5CH2CH2NH 3 + , PEA) cation, (PEA)2PbX4 (X = Br, I), with a well-defined rectangular geometry and nanoscale thickness through a dissolution–recrystallization process. The crystal structures of (PEA)2PbX4 are first confirmed using single-crystal X-ray diffraction. A solution-phase transport-growth process is developed to grow microplates with a typical size of tens of micrometers and thickness of hundreds of nanometers on another clean substrate different from the substrate coated with lead-acetate precursor film. Surface-topography analysis suggests that the formation of the 2D microplates is likely driven by the wedding-cake growth mechanism. Through halide alloying, the photoluminescence emission of (PEA)2Pb(Br,I)4 perovskites with a narrow peak bandwidth is readily tuned from violet (~410 nm) to green (~530 nm).
Keywordslayered lead-halide perovskite phenylethylammonium lead-halide perovskites microplate nanoplate dissolution–recrystallization photoluminescence
Unable to display preview. Download preview PDF.
This work is supported by the Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering (No. DE-FG02-09ER46664). D. W. M. also acknowledges financial support from the China Scholarship Council and the Natural Science Foundation of Zhejiang Province of China (No. LY13F040002). L. N. D. also thanks the UW-Madison Advanced Opportunity Fellowship (AOF) and NSF Graduate Research Fellowship for support.
- Mitzi, D. B. Templating and structural engineering in organic-inorganic perovskites. J. Chem. Soc., Dalton Trans. 2001, 1–12.Google Scholar
- Lanty, G.; Lauret, J. S.; Deleporte, E.; Bouchoule, S.; Lafosse, X. UV polaritonic emission from a perovskite-based microcavity. Appl. Phys. Lett. 2008, 93, 081101.Google Scholar
- Zhang, S. J.; Audebert, P.; Wei, Y.; Al Choueiry, A.; Lanty, G.; Bré hier, A.; Galmiche, L.; Clavier, G.; Boissiè re, C.; Lauret, J.-S. et al. Preparations and characterizations of luminescent two dimensional organic–inorganic perovskite semiconductors. Materials 2010, 3, 3385–3406.CrossRefGoogle Scholar
- Fu, Y. P.; Meng, F.; Rowley, M. B.; Thompson, B. J.; Shearer, M. J.; Ma, D. W.; Hamers, R. J.; Wright, J. C.; Jin, S. Solution growth of single crystal methylammonium lead halide perovskite nanostructures for optoelectronic and photovoltaic applications. J. Am. Chem. Soc. 2015, 137, 5810–5818.CrossRefGoogle Scholar