Nonlinear frequency doubling device, chiral perovskite material and preparation method and application thereof

A perovskite material, nonlinear technology, applied in nonlinear optics, polycrystalline material growth, chemical instruments and methods, etc., can solve problems such as poor deliquescence resistance, achieve good deliquescence resistance, good thermal stability, The effect of a good laser damage threshold

Pending Publication Date: 2021-12-31
NANKAI UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] The traditional chiral perovskite exemplified above has the defect of poor deliquescence resistance

Method used

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  • Nonlinear frequency doubling device, chiral perovskite material and preparation method and application thereof
  • Nonlinear frequency doubling device, chiral perovskite material and preparation method and application thereof
  • Nonlinear frequency doubling device, chiral perovskite material and preparation method and application thereof

Examples

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preparation example Construction

[0063] In a second aspect, the present invention provides a method for preparing the above-mentioned chiral perovskite material, the preparation method comprising the following steps:

[0064] Under the condition of hydrohalic acid, R / S-2-methylpiperidine and lead halide are heated to react, and the impurities in the obtained reaction liquid are removed and evaporated to dryness.

[0065] The main synthetic route of the present invention is as follows:

[0066]

[0067] In one example, the heating temperature is 60°C-70°C. For example, 60°C, 65°C, 70°C, etc.

[0068] In one of the examples, the ratio of the R / S-2-methylpiperidine, the lead halide to the hydrohalic acid is (8mmol-8.5mmol): (8mmol-8.5mmol): (45mL -55mL). For example, 8.3mmol: 8.3mmol: 50mL, 8.5mmol: 8.5mmol: 45mL, 8mmol: 8mmol: 55mL, etc.

[0069] In one example, filtration is used to remove impurities in the reaction solution.

[0070] In one example, a filter membrane with a pore size of 0.15 μm-0.25 μ...

Embodiment 1

[0090] The synthesis route of the nonlinear optical material chiral perovskite involved in this embodiment is as follows:

[0091]

[0092] (1) Dissolve S-2-methylpiperidine (1mL, 8.3mmol) and lead bromide (3.05g, 8.3mmol) in 50mL of hydrobromic acid, heat at 65°C and keep stirring until a colorless transparent solution is formed.

[0093] (2) After cooling, use a 0.2 μm polytetrafluoroethylene filter to filter the solution into a beaker, and place it in an undisturbed room for natural volatilization.

[0094] The nonlinear optical material provided in this embodiment is a lead-based perovskite with S-2-methylpiperidine as a chiral organic amine, and its molecular formula is C 6 h 14 NPbBr 3 , the crystal is orthorhombic, and the space group is P212121.

[0095] The above-mentioned synthetic route provided in this example, one-step dissolution, volatilization at room temperature, a colorless large block crystal with a size of 6 mm × 6 mm × 2 mm is obtained after a few we...

Embodiment 2

[0107] like Figure 15 As shown, this embodiment provides a nonlinear crystal doubling device for generating frequency doubling in a resonant cavity, which includes a lead-based perovskite with R / S-2-methylpiperidine as a chiral organic amine Crystal is the frequency doubling device 1 and the filter device 2 made of material.

[0108] The filter device 2 can filter the fundamental frequency laser to obtain pure frequency-doubled light. This device can be a colored glass filter, an interference bandpass filter, a neutral density absorption filter, a neutral density reflection type Filters, circular graded neutral density filters, birefringent filters, magneto-optic modulators, or electro-optic modulators.

[0109] In this way, the nonlinear crystal frequency doubling device is placed inside the resonator, when the polarized fundamental frequency light that meets the phase matching condition passes through the lead-based perovskite crystal in which R / S-2-methylpiperidine is a c...

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Abstract

The invention relates to a nonlinear frequency doubling device, a chiral perovskite material and a preparation method and application thereof. The invention relates to a chiral perovskite material and a preparation method and application thereof. The one-dimensional chiral perovskite material with a new structure is prepared for the first time by selecting R / S-2-methylpiperidine as the chiral organic amine, the lead-based perovskite taking R / S-2-methylpiperidine as the chiral organic amine is provided, and the application limitation caused by inherent defects of the perovskite material is solved. The material has the following characteristics: a huge second harmonic generation signal and a second-order nonlinear property are realized, phase matching and high polarization ratio can be realized, and a wide transparent window is provided in an ultraviolet region, a visible region and an infrared region; the material has the advantages of good laser damage threshold, excellent air stability and good thermal stability, and high-quality large crystals can be prepared by a simple volatilization method; and all properties of all high-quality nonlinear crystals are met, and the application of perovskite in the field of nonlinear optics is a great progress.

Description

technical field [0001] The invention belongs to the field of perovskite materials, and in particular relates to a chiral perovskite material, a preparation method and application thereof, and a nonlinear frequency doubling device. Background technique [0002] Chirality constitutes the basic life phenomena and laws in nature, and is closely related to the activities of the entire universe. If an object cannot coincide with its mirror image through rotation and movement, it means that the object has chirality. Designing and preparing functional materials with chiral optical activity has become an important development direction in the fields of chemistry, life science, materials science and physics. Chiral materials have extremely important applications in the field of biomedicine, such as pharmaceuticals, diagnostic analysis, bioengineering, etc. Some drugs have two kinds of left-handed and right-handed, and their chemical properties are exactly the same, but the microscop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/109H01S5/06G02F1/355G02B5/28G02B5/22G02B5/20C30B29/12C30B7/14
CPCH01S3/109H01S5/0604C30B29/12C30B7/14G02F1/355G02B5/20G02B5/22G02B5/28
Inventor 徐加良郑永申信明阳卜显和
Owner NANKAI UNIV
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