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Synthesis, Structure and Photoluminescence Properties of 2D Organic–Inorganic Hybrid Perovskites

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School of Mechanical and Electrical Engineering, Hubei Key Laboratory of Optical Information and Pattern Recognition, School of Optical Information and Energy Engineering, Wuhan Institute of Technology, Wuhan 430073, China
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School of Physics, Huazhong University of Science & Technology, Wuhan 430073, China
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Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(23), 5211; https://doi.org/10.3390/app9235211
Received: 9 November 2019 / Revised: 25 November 2019 / Accepted: 27 November 2019 / Published: 29 November 2019
Two-dimensional (2D) layered hybrid organic–inorganic perovskites have potential applications in solar cells, electroluminescent devices and radiation detection because of their unique optoelectronic properties. In this paper, four 2D layered hybrid organic–inorganic halide perovskites of (C6H5CH2NH3)2PbCl4, (C6H5CH2NH3)2PbBr4, (C6H5CH2NH3)2PbI4 and (C4H9NH3)2PbBr4 were synthesized by solvent evaporation. Their crystal structure and surface morphology were studied. The effects of different halogens and organic amines on perovskites’ absorption spectra were investigated, and the photoluminescence (PL) properties were studied by femtosecond ultrafast spectroscopy. The experimental results show that the four perovskites are well crystallized and oriented. With the increase of halogen atom number (Cl, Br, I) in turn, the UV-Vis absorption spectra peaks of perovskites redshift due to the increasing of the layer spacing, but organic amines have little effect on the spectra of perovskites. The PL intensity increases with increasing laser power, but the lifetime decreases with increasing laser power, which is mainly due to the non-geminate recombination. This research is of great significance for realizing the spectral regulation of organic–inorganic hybrid perovskites and promoting their application in nano-photonics and optoelectronic devices. View Full-Text
Keywords: two-dimensional (2D) layered hybrid organic-inorganic perovskites; UV-Vis absorption spectrum; photoluminescence lifetime two-dimensional (2D) layered hybrid organic-inorganic perovskites; UV-Vis absorption spectrum; photoluminescence lifetime
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Liu, Y.; Li, F.; Yao, F.; He, Z.; Liu, S.; Xu, L.; Han, X.; Wang, K. Synthesis, Structure and Photoluminescence Properties of 2D Organic–Inorganic Hybrid Perovskites. Appl. Sci. 2019, 9, 5211.

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