Tunable phase transition temperature and nonlinear optical properties of organic-inorganic hybrid perovskites enabled by dimensional engineering

Organic-inorganic hybrid materials have received extensive interest due to their easily adjustable structures, environmentally friendly features and excellent properties. Recently, plenty of organic-inorganic hybrids have been reported. However, low phase transition temperature and limited propertie...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2022-11, Vol.1 (43), p.1633-16336
Main Authors: Jia, Qiang-Qiang, Ni, Hao-Fei, Lun, Meng-Meng, Xie, Li-Yan, Lu, Hai-Feng, Fu, Da-Wei, Guo, Qiang
Format: Article
Language:English
Subjects:
Bilayers
Energy gap
Ferroelectricity
Monolayers
Multifunctional materials
Nonlinear optics
Optical properties
Optoelectronics
Perovskites
Phase transitions
Second harmonic generation
Temperature
Transition temperature
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Summary:Organic-inorganic hybrid materials have received extensive interest due to their easily adjustable structures, environmentally friendly features and excellent properties. Recently, plenty of organic-inorganic hybrids have been reported. However, low phase transition temperature and limited properties restrict their applications. Therefore, improving the phase transition temperature and enriching optoelectronics properties have become the top priorities. Herein, we have successfully synthesized two bilayer (2D/3D) perovskites, (MACH) 2 ·CsPb 2 Br 7 (Prv-2) and (BMACH)·CsPb 2 Br 7 (Prv-3), based on a single layer perovskite, (MACH) 2 ·PbBr 4 (Prv-1), (MACH = cyclohexanemethylaminium and BMACH = 1,3-cyclohexanedimethanaminium). The experimental results show that the phase transition temperature (385-415 K) of bilayer perovskites has been significantly improved by increasing the thickness of the inorganic framework. Meanwhile, the offset of the mineralizer (Cs + , (0.5, 0.5, 0.5) → (0.5, 0.76, 0.47)) in the Prv-3 makes it crystallize in the polar space group ( Pmc 2 1 ). Therefore, the SHG (second harmonic generation) measurement indicates that it possesses 0.5 times the signal intensity compared to KDP. Finally, optical characterization and theoretical calculation synergistically verify that all three perovskites belong to direct bandgap semiconductors. Consequentially, the strategies in this work might pave the way for the design and construction of multifunctional materials with a narrow band gap, non-linear optics and ferroelectricity. Improving the phase transition temperature and enriching optoelectronics properties have become the top priorities. Herein, we have successfully synthesized two bilayer (2D/3D) perovskite materials based on a single layer perovskite.
ISSN:2050-7526
2050-7534
DOI:10.1039/d2tc03497b