scholarly journals Compatible Ferroelectricity, Antiferroelectricity and Broadband Emission for a Multi-Functional 2D Organic-Inorganic Hybrid Perovskite

2021 ◽  
Author(s):  
Wenjuan Wei ◽  
Hongqiang Gao ◽  
Yuhui Tan ◽  
Yunzhi Tang
Keyword(s):  
Second Harmonic ◽  
Photophysical Properties ◽  
Blue Shift ◽  
Molecular Reorientation ◽  
Inorganic Hybrid ◽  
Electron Phonon Interaction ◽  
Broadband Emission ◽  
Hybrid Perovskite ◽  
Potential Applications ◽  
Energy Storage Efficiency

Two-dimensional (2D) organic-inorganic hybrid perovskites with multifunctional characteristics have potential applications in many fields, such as, solar cells, microlasers and light-emitting diodes (LEDs), etc. Here, a 2D organic-inorganic lead halide perovskite, [Br(CH<sub>2</sub>)<sub>3</sub>NH<sub>3</sub>]<sub>2</sub>PbBr<sub>4</sub> (<b>BPA-PbBr<sub>4</sub></b>, BPA = Br(CH<sub>2</sub>)<sub>3</sub>NH<sub>3</sub>, 3-Bromopropylamine), is examined for its photophysical properties. Interestingly, <b>BPA-PbBr<sub>4</sub></b> reveals five successive phase transitions with decreasing temperature, including successive paraelectric-ferroelectric-antiferroelectric phases. Besides, <b>BPA-PbBr<sub>4</sub></b> displays ferroelectricity and antiferroelectricity throughout a wide temperature range (<376.4 K) with accompanying saturation polrization (<i>P</i><sub>s</sub>) values of 4.35 and 2.32 μC/cm<sup>2</sup>, respectively, and energy storage efficiency of 28.2%, and also exhibits superior second harmonic generation (SHG) with maximum value accounts for 95 % of the standard KDP due to the great deformation of structure (3.2302*10<sup>-4</sup>). In addition, the photoluminescence (PL) of the <b>BPA-PbBr<sub>4</sub></b> exhibits abnormal red-shift and blue-shift in different phases due to a consequence of competition between electron-phonon interaction and the lattice expansion. Further, <b>BPA-PbBr<sub>4</sub></b> reveals a broadband emission accompanied by bright white light at room temperature (293 K), which is supposed to be due to self-trapped excitons. In short, the versatility of <b>BPA-PbBr<sub>4</sub></b> originates from molecular reorientation of dynamic organic cations, as well as significant structural distortion of PbBr<sub>6</sub> octahedra. This work paves an avenue to design new hybrid multifunctional perovskites for potential applications in the photoelectronic field.

scholarly journals Compatible Ferroelectricity, Antiferroelectricity and Broadband Emission for a Multi-Functional 2D Organic-Inorganic Hybrid Perovskite

2021 ◽  
Author(s):  
Wenjuan Wei ◽  
Hongqiang Gao ◽  
Yuhui Tan ◽  
Yunzhi Tang
Keyword(s):  
Second Harmonic ◽  
Photophysical Properties ◽  
Blue Shift ◽  
Molecular Reorientation ◽  
Inorganic Hybrid ◽  
Electron Phonon Interaction ◽  
Broadband Emission ◽  
Hybrid Perovskite ◽  
Potential Applications ◽  
Energy Storage Efficiency

Two-dimensional (2D) organic-inorganic hybrid perovskites with multifunctional characteristics have potential applications in many fields, such as, solar cells, microlasers and light-emitting diodes (LEDs), etc. Here, a 2D organic-inorganic lead halide perovskite, [Br(CH<sub>2</sub>)<sub>3</sub>NH<sub>3</sub>]<sub>2</sub>PbBr<sub>4</sub> (<b>BPA-PbBr<sub>4</sub></b>, BPA = Br(CH<sub>2</sub>)<sub>3</sub>NH<sub>3</sub>, 3-Bromopropylamine), is examined for its photophysical properties. Interestingly, <b>BPA-PbBr<sub>4</sub></b> reveals five successive phase transitions with decreasing temperature, including successive paraelectric-ferroelectric-antiferroelectric phases. Besides, <b>BPA-PbBr<sub>4</sub></b> displays ferroelectricity and antiferroelectricity throughout a wide temperature range (<376.4 K) with accompanying saturation polrization (<i>P</i><sub>s</sub>) values of 4.35 and 2.32 μC/cm<sup>2</sup>, respectively, and energy storage efficiency of 28.2%, and also exhibits superior second harmonic generation (SHG) with maximum value accounts for 95 % of the standard KDP due to the great deformation of structure (3.2302*10<sup>-4</sup>). In addition, the photoluminescence (PL) of the <b>BPA-PbBr<sub>4</sub></b> exhibits abnormal red-shift and blue-shift in different phases due to a consequence of competition between electron-phonon interaction and the lattice expansion. Further, <b>BPA-PbBr<sub>4</sub></b> reveals a broadband emission accompanied by bright white light at room temperature (293 K), which is supposed to be due to self-trapped excitons. In short, the versatility of <b>BPA-PbBr<sub>4</sub></b> originates from molecular reorientation of dynamic organic cations, as well as significant structural distortion of PbBr<sub>6</sub> octahedra. This work paves an avenue to design new hybrid multifunctional perovskites for potential applications in the photoelectronic field.

Studie über den Einfluss des Fluorierungsgrades an einem tetradentaten C^N*N^C-Luminophor auf die photophysikalischen Eigenschaften seiner Platin(II)-Komplexe und deren Aggregation

2018 ◽  
Vol 73 (11) ◽  
pp. 849-863 ◽  
Author(s):  
Sebastian Wilde ◽  
Linda Stegemann ◽  
Constantin G. Daniliuc ◽  
Tobias Koch ◽  
Nikos L. Doltsinis ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Optoelectronic Devices ◽  
Blue Shift ◽  
Amorphous Solids ◽  
Clear Trend ◽  
Monomeric Species ◽  
Potential Applications ◽  
Homo Lumo

AbstractHerein, we present three new tetradentate C^N*N^C luminophores and their platinum(II) complexes. We describe the influence of the degree of fluorination at the phenylpyridine luminophore on the photophysical properties of the monomeric species. A blue-shift can be observed with increasing number of fluorine atoms (0–6), which is related to a growing HOMO-LUMO gap that reaches a maximum for four halogen moieties. Increasing degree of fluorination enables intermolecular Pt–Pt interactions and promotes emission from 3MMLCT states in amorphous solids and matrices, with the drawback of lowered solubility. A clear trend towards layered packing patterns in crystals has been observed within the series. This knowledge is important for the design and realization of triplet emitters with aggregation-controlled luminescence towards potential applications in optoelectronic devices.

scholarly journals Effect of Processing Technique Factors on Structure and Photophysical Properties of Perovskite Absorption Layer by Using Two-Step Spin-Coating Method

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 761
Author(s):  
Zixiao Zhou ◽  
Xiaoping Zou ◽  
Jialin Zhu ◽  
Jin Cheng ◽  
Haiyan Ren ◽  
...  
Keyword(s):  
Spin Coating ◽  
Perovskite Phase ◽  
Photophysical Properties ◽  
Precursor Solution ◽  
Coating Process ◽  
High Concentration ◽  
Inorganic Hybrid ◽  
Spin Coating Process ◽  
Enhanced Absorption ◽  
Hybrid Perovskite

The investigation of crystal growth is crucial for us to improve the film quality and photophysical properties of CH3NH3PbI3 (MAPbI3). In the two-step spin-coating process, the crystal structure could be modulated by controlling the growth conditions of PbI2 and CH3NH3I (MAI) layers. In this paper, the PbI2 layer was treated with annealing under different times. A liquid–liquid diffusion (LLD) mechanism is proposed to modify the deposition of MAI precursor solution and enhance the flatness of organic–inorganic hybrid perovskite film. Furthermore, the perovskite films are prepared using different concentrations of MAI. The evolution process of perovskite structure is observed by modulating the concentration of MAI. The spin-coating of moderate MAI tends to form high quality MAPbI3 films with enhanced absorption and carrier extraction capabilities. The high concentration of MAI would cause the perovskite phase transition, which provides a novel perspective to modulate the structure of organic–inorganic hybrid perovskite in the two-step spin-coating process, although it deteriorates the device performance.

A two-dimensional organic–inorganic hybrid perovskite-type semiconductor: poly[(2-azaniumylethyl)trimethylphosphanium [tetra-μ-bromido-plumbate(II)]]

2019 ◽  
Vol 75 (3) ◽  
pp. 354-358 ◽  
Author(s):  
Ling Cheng ◽  
Yingjie Cao
Keyword(s):  
Three Dimensional ◽  
Two Dimensional ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite ◽  
Perovskite Material ◽  
Potential Applications ◽  
Type Semiconductor ◽  
Indirect Band Gap ◽  
2D Hybrid Perovskite ◽  
Perovskite Type

Recently, with the prevalence of `perovskite fever', organic–inorganic hybrid perovskites (OHPs) have attracted intense attention due to their remarkable structural variability and highly tunable properties. In particular, the optical and electrical properties of organic–inorganic hybrid lead halides are typical of the OHP family. Besides, although three-dimensional hybrid perovskites, such as [CH3NH3]PbX 3 (X = Cl, Br or I), have been reported, the development of new organic–inorganic hybrid semiconductors is still an area in urgent need of exploration. Here, an organic–inorganic hybrid lead halide perovskite is reported, namely poly[(2-azaniumylethyl)trimethylphosphanium [tetra-μ-bromido-plumbate(II)]], {(C5H16NP)[PbBr4]} n , in which an organic cation is embedded in inorganic two-dimensional (2D) mesh layers to produce a sandwich structure. This unique sandwich 2D hybrid perovskite material shows an indirect band gap of ∼2.700 eV. The properties of this compound as a semiconductor are demonstrated by a series of optical characterizations and indicate potential applications for optical devices.

scholarly journals Pressure-Induced Broadband Emission of 2D Organic-Inorganic Hybrid Perovskite (C6 H5 C2 H4 NH3 )2 PbBr4

2018 ◽  
Vol 6 (2) ◽  
pp. 1801628 ◽  
Author(s):  
Long Zhang ◽  
Lianwei Wu ◽  
Kai Wang ◽  
Bo Zou
Keyword(s):  
Inorganic Hybrid ◽  
Broadband Emission ◽  
Hybrid Perovskite

Nanochemical Investigation of Degradation in Organic–Inorganic Hybrid Perovskite Films Using Infrared Nanoscopy

2020 ◽  
Vol 124 (6) ◽  
pp. 3915-3922 ◽  
Author(s):  
Hyang Mi Yu ◽  
Hye Min Oh ◽  
Dae Young Park ◽  
Mun Seok Jeong
Keyword(s):  
Inorganic Hybrid ◽  
Hybrid Perovskite

Ferroelastic domains and phase transitions in organic–inorganic hybrid perovskite CH3NH3PbBr3

2021 ◽  
Author(s):  
Maryam Bari ◽  
Alexei A. Bokov ◽  
Zuo-Guang Ye
Keyword(s):  
Phase Transitions ◽  
Electric Field ◽  
Light Microscopy ◽  
Domain Structure ◽  
Polarized Light ◽  
External Stress ◽  
Polarized Light Microscopy ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite ◽  
Ferroelastic Domains

Polarized light microscopy reveals twin domains and symmetry of the phases in CH3NH3PbBr3 crystal; domain structure remains unresponsive to electric field but changes under external stress, confirming ferroelasticity while ruling out ferroelectricity.

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