Antimony-based organic-inorganic hybrid metal halide luminescent material and preparation method thereof

Abstract

The present invention provides an antimony-based organic-inorganic hybrid metal halide luminescent material and a preparation method thereof, which is applicable to the photoelectric field. The present invention uses 2-methylpiperazine as an organic ligand to synthesize a luminescent material with the chemical formula (C5H 14 N2)SbCl5 luminescent material, where C5H 14 N2 represents the cationic form of 2-methylpiperazine. The excitation wavelength range of this material is 250 to 400 nanometers, while its emission wavelength covers 450 to 850 nanometers, with the main emission peak at approximately 600 to 650 nanometers. The preparation method of the present invention is characterized by a simple process, low cost, and suitability for large-scale production. In addition, the luminescent material exhibits wide excitation and emission bandwidths and has high luminous efficiency. It can be widely used in the manufacture of light-emitting devices, as well as in applications such as phosphors, spectrum conversion, and display lighting.

Description

Technical Field

[0001] The present invention relates to the technical field of photoelectric materials, and in particular to an antimony-based organic-inorganic hybrid metal halide luminescent material, a preparation method thereof, and applications in the photoelectric field. Background Art

[0002] With the rapid development of optoelectronic technology, luminescent materials are increasingly being used in fields such as displays, lighting, bioimaging, and security marking. Organic-inorganic hybrid metal halides, in particular, have become a hot topic of research due to their excellent optical properties and tunable band gaps. These materials typically exhibit high quantum efficiency, broad absorption spectra, and tunable luminescence properties, giving them broad application potential in optoelectronic devices. Traditional luminescent materials, such as pure organic light-emitting diodes (OLEDs) and inorganic semiconductors, are widely used in commercial display and lighting devices, but they are often limited by cost, preparation complexity, or environmental stability. For example, high-performance OLED materials often require expensive rare metal complexes or complex synthesis steps, while traditional inorganic luminescent materials, such as quantum dots, face challenges with toxicity and environmental stability.

[0003] In this context, antimony-based organic-inorganic hybrid metal halides, as a new type of luminescent material, have shown potential to address these issues. Compared to traditional materials, this type of hybrid material combines the design flexibility of organic molecules with the high optoelectronic properties of inorganic components, exhibiting better photostability and the ability to optimize their optoelectronic properties through simple chemical regulation. However, these hybrid materials currently on the market still have limitations in terms of luminous efficiency, color purity, and preparation costs, and there is an urgent need to develop new material systems and preparation technologies to overcome these challenges. Summary of the Invention

[0004] The present invention provides a novel antimony-based organic-inorganic hybrid metal halide based on 2-methylpiperazine. Through specific ligand design and preparation methods, it optimizes luminous efficiency and color performance while reducing production costs, bringing an economical and effective new material solution to the optoelectronic field.

[0005] To achieve the above objectives, the present invention introduces a macrocyclic organic cation 2-methylpiperazine as an organic ligand to prepare an organic-inorganic hybrid metal halide luminescent material with strong stability and high luminescence intensity. Its emission band covers 450-850 nm, the emission peak is located around 600-650 nm, and the excitation wavelength range is 250-400 nm.

[0006] Another object of the present invention is to provide a method for preparing the above-mentioned antimony-based organic-inorganic hybrid metal halide luminescent material with 2-methylpiperazine as a ligand, which has a simple preparation process and is easy to promote on a large scale.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] An antimony-based organic-inorganic hybrid metal halide luminescent material, the molecular formula of which is (C5H 14 N2)SbCl5, where C5H 14 N2 represents the cationic form of 2-methylpiperazine.

[0009] Furthermore, the antimony-based organic-inorganic hybrid metal halide luminescent material uses the organic substance 2-methylpiperazine as an organic ligand and the Sb element as a trivalent cation.

[0010] A method for preparing the antimony-based organic-inorganic hybrid metal halide luminescent material as described above comprises the following steps:

[0011] (1) Weigh the material: according to the molecular formula (C5H 14 N2) SbCl5 is prepared, compound SbCl3 is weighed, powder of organic 2-methylpiperazine and HCl acid are measured;

[0012] (2) Mixing the organic matter 2-methylpiperazine and SbCl3 in a container and adding HCl acid to obtain a mixed solution;

[0013] (3) heating the mixed solution obtained in step (2) and continuously stirring until the mixture is completely dissolved to obtain a clear solution;

[0014] (4) The solution obtained in step (3) is placed in an oven. The initial temperature of the oven is the temperature at which the solution is completely dissolved after stirring in step (3). The temperature is slowly lowered. After cooling for 1-7 days, the obtained reaction solution is filtered and dried in sequence to obtain an organic-inorganic hybrid metal halide (C5H 14 N2)SbCl5 crystals.

[0015] Furthermore, step (1) selects 2-methylpiperazine as a ligand of a small molecule organic compound, which has high solubility, especially in water and organic solvents. Its molecular structure is relatively simple and not easily decomposed, which can ensure the formation of a stable organic-inorganic hybrid metal halide during the synthesis process, avoid excessive decomposition or aggregation, and improve the controllability of the reaction and the purity of the product. In addition, the synthesis route of 2-methylpiperazine is relatively simple and easy to operate. It can be dissolved in common solvents, and the product generated when reacting with SbCl3 is easy to purify, which makes it highly practical in the laboratory synthesis process.

[0016] Furthermore, in step (1), the molar ratio of SbCl3 to 2-methylpiperazine is 1:1 to 1:3. HCl acid is used as a solvent as long as it can dissolve 2-methylpiperazine and SbCl3, and the concentration and specific addition amount are not limited.

[0017] Furthermore, in step (3), the temperature of the solution heating and stirring reaction is 60-100°C.

[0018] Furthermore, in step (4), the slow cooling is natural cooling.

[0019] The present invention also provides the application of the antimony-based organic-inorganic hybrid metal halide luminescent material in the field of photoelectricity.

[0020] Furthermore, the optoelectronic field is the field of lighting, light-emitting diodes, lasers, solar cells, phototransistors, phosphors and photodetectors.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] (1) High fluorescence conversion efficiency;

[0023] (2) Wide emission spectrum coverage;

[0024] (3) High luminous efficiency and excellent thermal stability;

[0025] (4) Stable physical and chemical properties;

[0026] (5) The preparation method of the present invention is simple and can be easily promoted on a large scale. The luminescent material can be used to manufacture light-emitting devices and applied in fields such as display lighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is the powder X-ray diffraction (XRD) pattern of Example 1 of the present invention.

[0029] Figure 2 This is the excitation spectrum of the sample prepared in Example 1 of the present invention.

[0030] Figure 3 This is the emission spectrum of the sample prepared in Example 1 of the present invention. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] The chemical composition formula of this embodiment is (C5H 14 The preparation method of the antimony-based organic-inorganic hybrid metal halide luminescent material of N2)SbCl5 is as follows:

[0034] The ingredients are prepared according to the stoichiometric ratio. According to the molar ratio of SbCl3 to organic matter of 1:1, 0.228g of high-purity SbCl3 compound powder raw material, 0.1g of organic 2-methylpiperazine powder, and 2 ml of hydrochloric acid with a mass concentration of 36% are weighed respectively. The measured organic 2-methylpiperazine solution and the powder raw material of the SbCl3 compound are mixed and dissolved in a container. A certain amount of HCl solution is added to the container where the organic 2-methylpiperazine solution and the SbCl3 powder raw material are located. The obtained mixed solution is then heated to a temperature of 90°C and continuously stirred until the mixture inside is completely dissolved to obtain a clear solution. The obtained clear solution is placed in a 90°C oven and slowly cooled for 5 days to obtain the required (C5H 14 N2) SbCl5 crystals and residual solution, the reaction solution and crystals were filtered and dried in turn to obtain (C5H 14 N2)SbCl5 crystals, and the correctness of the elemental composition was verified by single crystal testing.

[0035] The powder X-ray diffraction (XRD) pattern of the organic-inorganic hybrid metal halide luminescent material prepared in this example is as follows: Figure 1 The excitation spectrum is shown as Figure 2 As shown, the excitation wavelength range is 250-400 nm, with one excitation peak located at 325-375 nm. Figure 3 As shown, the emission band is located at 450-850 nm, and the emission peak is at 630 nm, indicating that this organic-inorganic hybrid metal halide luminescent material can achieve broadband emission.

[0036] Example 2

[0037] The preparation method is basically the same as that of Example 1, except that the mixed solution is heated to 80°C and stirred continuously until the mixture is completely dissolved to obtain a clear solution. The obtained clear solution is placed in an oven at 80°C and slowly cooled for 4 days to obtain the desired (C5H 14 N2)SbCl5 crystals.

[0038] The powder X-ray diffraction pattern, excitation and emission spectra of the organic-inorganic hybrid metal halide luminescent material prepared in this example are consistent with those in Example 1.

[0039] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. Application of an antimony-based organic-inorganic hybrid metal halide luminescent material in the field of optoelectronics, characterized in that: The molecular formula of the luminescent material is (C5H 14 N2)SbCl5, where C5H 14 N2 represents the cationic form of 2-methylpiperazine; The excitation wavelength of the luminescent material is 250-400 nm, the emission wavelength range is 450-850 nm, and the emission peak is located at 600-650 nm; The method for preparing the antimony-based organic-inorganic hybrid metal halide luminescent material comprises the following steps: (1) Weigh the material: according to the molecular formula (C5H 14 N2) SbCl5 is prepared, compound SbCl3 is weighed, powder of organic 2-methylpiperazine and HCl acid are measured; (2) Mixing the organic matter 2-methylpiperazine and SbCl3 in a container and adding HCl acid to obtain a mixed solution; (3) heating the mixed solution obtained in step (2) and continuously stirring until the mixture is completely dissolved to obtain a clear solution; (4) The solution obtained in step (3) is placed in an oven. The initial temperature of the oven is the temperature at which the solution is completely dissolved after stirring in step (3). The temperature is slowly lowered. After cooling for 1-7 days, the obtained reaction solution is filtered and dried in sequence to obtain an organic-inorganic hybrid metal halide (C5H 14 N2)SbCl5 crystals.

2. The use according to claim 1, characterized in that In step (1), the molar ratio of SbCl3 to 2-methylpiperazine is 1:1 to 1:

3.

3. The use according to claim 1, characterized in that In step (3), the solution is heated and stirred to react at a temperature of 60 to 100°C.

4. The use according to claim 1, characterized in that In step (4), the slow cooling is natural cooling.

5. The use according to claim 1, characterized in that The optoelectronic field includes lighting, light-emitting diodes, lasers, solar cells, phototransistors, phosphors and photodetectors.

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