Preparation method and application of all-inorganic vacancy ordered double perovskite luminescent material

Abstract

The invention discloses a preparation method and application of an all-inorganic vacancy ordered double-perovskite luminescent material, and belongs to the technical field of lead-free perovskite luminescent materials. The preparation method comprises the following steps: putting raw materials CsCl and ZrCl4 into a polytetrafluoroethylene lining, and mixing; then adding Sb2O3 and 8-Hydroxyquinine, adding hydrochloric acid as a solvent, and stirring for one hour so that the Sb2O3 and the 8-Hydroxyquinine are fully and uniformly mixed; and finally, putting the polytetrafluoroethylene lining into a cylinder sleeve of a reaction kettle, putting the polytetrafluoroethylene lining into a drying oven for reaction, slowly cooling the polytetrafluoroethylene lining to room temperature in the drying oven after the reaction is finished, cleaning the polytetrafluoroethylene lining with absolute ethyl alcohol, and drying the polytetrafluoroethylene lining to obtain the lead-free perovskite material. The prepared full-inorganic vacancy ordered double perovskite luminescent material can emit visible green light, yellow light and orange light under 365 nm excitation, and can be applied to triplet state luminescence regulation and thermal response information encryption.

Description

Technical Field

[0001] The present invention relates to the technical field of lead-free perovskite luminescent materials, and in particular to a preparation method and application of a fully inorganic vacancy ordered double perovskite luminescent material. Background Art

[0002] Lead-free halide perovskites (DPs) as luminescent materials have attracted extensive attention in materials science and optoelectronics due to their low toxicity, high chemical stability, thermal stability, and photostability. In particular, multicolor and multimode luminescent materials show great promise in advanced anti-counterfeiting, optical sensing, smart lighting devices, and optical information encryption due to their controllable multiple emission colors under different external stimuli. Typically, color-tunable emission is achieved through photoexcitation sources, such as UV light, X-rays, and NIR lasers, providing high designability for a wide range of lighting applications.

[0003] Main group ns 2 Metal ions, mainly Sn 2+ , Sb 3+ and Bi 3+ , are often selected as sensitizers and emitters to tune the optical properties of various materials. 2 Cation doping can allow the introduction of self-trapped exciton (STE) emission for multiexciton luminescence. However, due to the complex ionic interactions in the host lattice, doping strategies usually suffer from low controllability or low efficiency in response to different excitation conditions. Therefore, exploring ns photocatalytic devices that can tune the emission color through external manipulation is an important goal. 2 Ion-activated materials remain a challenge.

[0004] Recently, 0-dimensional all-organic and all-inorganic vacancy-ordered double perovskites have been considered as attractive materials for a wide range of optoelectronic and photonic applications. In particular, their unique crystal and electronic structures favor the formation of STEs, making luminescence in lighting technology a real possibility. As a lead-free perovskite derivative, all-inorganic vacancy-ordered double perovskite Cs 2 MCl 6 (M=Zr 4+ , Hf 4+ and Sn 4+ ) has attracted much attention due to its low cost, environmental friendliness, high structural stability and interesting optical properties. However, based on the exciton dynamics of STE emission, the singlet STE emission is weak at room temperature due to the ultrafast relaxation process from the singlet STE intermediate to the emitting triplet STE state. The harvesting of singlet excitons can be enhanced from thermally activated delayed fluorescence, which is rare in all-organic and all-inorganic vacancy-ordered double perovskites. Therefore, it is urgent to develop a simple and rational strategy to tune the singlet-triplet emission properties for advanced multimode luminescence applications. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a method for preparing an all-inorganic vacancy ordered double perovskite luminescent material, aiming to study Sb 3+ and 8-Hydroxyquinoline-doped Cs 2 ZrCl 6 Multi-exciton emission characteristics in perovskite crystals; by adjusting the concentration of dopants and luminescence conditions, the singlet-triplet emission properties can be adjusted for advanced multimode luminescence applications, providing new ideas and directions for the application of perovskite materials in the field of optoelectronics.

[0006] In order to achieve the above technical effects, the present invention is implemented by the following technical solutions: A method for preparing an all-inorganic vacancy ordered double perovskite luminescent material, characterized in that: Cs 2 ZrCl 6 As the perovskite matrix, Sb 3+ The fully inorganic vacancy ordered double perovskite luminescent material is obtained by doping with 8-Hydroxyquinoline. The specific preparation steps are as follows:

[0007] S1, An The amount of substance ratio is CsCl: ZrCl 4 =2~4:1~2 ratio, weigh CsCl and ZrCl 4 Add to the tetrafluoroethylene liner and mix to obtain mixture A;

[0008] S2. Add Sb to the obtained mixture A. 2 O 3 and 8-Hydroxyquinoline, and adding hydrochloric acid, stirring and mixing well to obtain a mixture B;

[0009] S3. Put the obtained mixture B into an oven for reaction, cool it to room temperature, wash it with anhydrous ethanol, and dry it to obtain a fully inorganic vacancy ordered double perovskite light-emitting material.

[0010] Furthermore, in S2, Sb 2 O 3 The mass percentage of added is CsCl, ZrCl 4 1% to 10% of the total mass; the mass percentage of 8-Hydroxyquinoline added is CsCl, ZrCl 4 3% to 40% of the total mass.

[0011] Furthermore, in S3, the reaction condition in the oven is 170-190° C. for 11-13 hours.

[0012] Another object of the present invention is to provide an application of an all-inorganic vacancy ordered double perovskite luminescent material, characterized in that the all-inorganic vacancy ordered double perovskite luminescent material is used in triplet luminescence regulation and thermal response information encryption.

[0013] The beneficial effects of the present invention are:

[0014] (1) The all-inorganic vacancy ordered double perovskite luminescent material prepared by the present invention can emit visible green light, yellow light and orange light under 365nm excitation;

[0015] (2) The all-inorganic vacancy ordered double perovskite luminescent material prepared by the present invention can emit visible blue light, yellow light and green light under excitation at 254nm, 310nm and 365nm;

[0016] (3) The all-inorganic vacancy ordered double perovskite luminescent material prepared by the present invention can change green light into yellow light when excited at 365nm and heated to 150 degrees, and can also achieve color restoration after cooling;

[0017] (4) The all-inorganic vacancy ordered double perovskite luminescent material prepared by the present invention can generate visible blue light under the excitation of X-ray laser;

[0018] (5) The all-inorganic vacancy ordered double perovskite luminescent material prepared by the present invention has good structural stability and excellent optical properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 X-ray diffraction (XRD) data diagram of the all-inorganic vacancy ordered double perovskite luminescent material in Example 4, Example 7, Example 9 and Comparative Example 1 of the present invention;

[0021] Figure 2 The scanning electron microscope (SEM) and element distribution map of the all-inorganic vacancy ordered double perovskite luminescent material in Example 1 of the present invention;

[0022] Figure 3 The inductively coupled plasma atomic emission spectrum (ICP-OES) of the all-inorganic vacancy ordered double perovskite luminescent material in Example 3 of the present invention;

[0023] Figure 4The all-inorganic vacancy ordered double perovskite luminescent material in Example 2 and Example 6 of the present invention shows luminescence phenomenon under 254nm, 310nm, 365nm and X-ray excitation, and changes color when heated at 365, making a secondary encryption anti-counterfeiting application display;

[0024] Figure 5 The X-ray photoelectron spectrum of the all-inorganic vacancy ordered double perovskite luminescent material in Example 5 of the present invention;

[0025] Figure 6 The luminescence spectrum of the all-inorganic vacancy ordered double perovskite luminescent material under 365 excitation in Example 3, Example 8, and Example 10 of the present invention;

[0026] Figure 7 The luminescence spectrum of the all-inorganic vacancy ordered double perovskite luminescent material under different excitations in Example 7 of the present invention;

[0027] Figure 8 This is a crystal structure diagram of the all-inorganic vacancy ordered double perovskite light-emitting material in Example 11 of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example 1

[0030] The CsCl and ZrCl 4 The molar ratio is CsCl:ZrCl 4 =2:1, Sb 2 O 3 The mass percentage of added is CsCl, ZrCl 4 1% of the total mass, the mass percentage of 8-Hydroxyquinoline added is CsCl, ZrCl 4 3% of the total mass, the specific preparation steps are as follows:

[0031] (1) Take CsCl and ZrCl in proportion 4 Add into the tetrafluoroethylene liner and mix to obtain mixture A.

[0032] (2) Then, Sb was added to the mixture A in step (1). 2 O 3and 8-Hydroxyquinoline, add hydrochloric acid and stir well to mix well to obtain a mixture B.

[0033] (3) Finally, the mixture B obtained in step (2) is placed in an oven at 180° C. for 12 h, cooled to room temperature, washed with anhydrous ethanol, and dried to obtain an all-inorganic vacancy ordered double perovskite luminescent material.

[0034] The scanning electron microscope (SEM) and element distribution map of the all-inorganic vacancy ordered double perovskite luminescent material obtained in this embodiment can be used to observe the position of each element in the structure.

[0035] Example 2

[0036] The CsCl and ZrCl 4 The molar ratio is CsCl:ZrCl 4 =2:1, Sb 2 O 3 The mass percentage of added is CsCl, ZrCl 4 2% of the total mass, the mass percentage of 8-Hydroxyquinoline added is CsCl, ZrCl 4 3% of the total mass, the specific preparation steps are as follows:

[0037] (1) Take CsCl and ZrCl in proportion 4 Add into the tetrafluoroethylene liner and mix to obtain mixture A.

[0038] (2) Then, Sb was added to the mixture A in step (1). 2 O 3 and 8-Hydroxyquinoline, add hydrochloric acid and stir well to mix well to obtain a mixture B.

[0039] (3) Finally, the mixture B obtained in step (2) is placed in an oven at 180° C. for 12 h, cooled to room temperature, washed with anhydrous ethanol, and dried to obtain an all-inorganic vacancy ordered double perovskite luminescent material.

[0040] The all-inorganic vacancy ordered double perovskite luminescent material obtained in this embodiment responds to X-rays when irradiated with X-rays, and emits visible blue light.

[0041] Example 3

[0042] The CsCl and ZrCl 4 The molar ratio is CsCl:ZrCl 4=2:1, Sb 2 O 3 The mass percentage of added is CsCl, ZrCl 4 2% of the total mass, the mass percentage of 8-Hydroxyquinoline added is CsCl, ZrCl 4 5% of the total mass, the specific preparation steps are as follows:

[0043] (1) Take CsCl and ZrCl in proportion 4 Add into the tetrafluoroethylene liner and mix to obtain mixture A.

[0044] (2) Then, Sb was added to the mixture A in step (1). 2 O 3 and 8-Hydroxyquinoline, add hydrochloric acid and stir well to mix well to obtain a mixture B.

[0045] (3) Finally, the mixture B obtained in step (2) is placed in an oven at 180° C. for 12 h, cooled to room temperature, washed with anhydrous ethanol, and dried to obtain an all-inorganic vacancy ordered double perovskite luminescent material.

[0046] The all-inorganic vacancy ordered double perovskite luminescent material obtained in this example was subjected to inductively coupled plasma atomic emission spectroscopy (ICP-OES), and it can be obtained from the table that Sb 3+ Successfully doped into the matrix, replacing Zr in the matrix 4+ location.

[0047] Example 4

[0048] The CsCl and ZrCl 4 The molar ratio is CsCl:ZrCl 4 =2:1, Sb 2 O 3 The mass percentage of added is CsCl, ZrCl 4 2% of the total mass, the mass percentage of 8-Hydroxyquinoline added is CsCl, ZrCl 4 8% of the total mass, the specific preparation steps are as follows:

[0049] (1) Take CsCl and ZrCl in proportion 4 Add into the tetrafluoroethylene liner and mix to obtain mixture A.

[0050] (2) Then, Sb was added to the mixture A in step (1). 2 O 3and 8-Hydroxyquinoline, add hydrochloric acid and stir well to mix well to obtain a mixture B.

[0051] (3) Finally, the mixture B obtained in step (2) is placed in an oven at 180° C. for 12 h, cooled to room temperature, washed with anhydrous ethanol, and dried to obtain an all-inorganic vacancy ordered double perovskite luminescent material.

[0052] The all-inorganic vacancy ordered double perovskite luminescent material obtained in this example was subjected to XRD test. The results are as follows: Figure 2 As shown, it can be seen from the figure that what is obtained is the pure phase of the all-inorganic vacancy ordered double perovskite luminescent material.

[0053] Example 5

[0054] The CsCl and ZrCl in the all-inorganic vacancy ordered double perovskite luminescent material prepared in the embodiment 4 The molar ratio is CsCl:ZrCl 4 =2:1, Sb 2 O 3 The mass percentage of added is CsCl, ZrCl 4 2% of the total mass, the mass percentage of 8-Hydroxyquinoline added is CsCl, ZrCl 4 10% of the total mass, the specific preparation steps are as follows:

[0055] (1) Take CsCl and ZrCl in proportion 4 Add into the tetrafluoroethylene liner and mix to obtain mixture A.

[0056] (2) Then, Sb was added to the mixture A in step (1). 2 O 3 and 8-Hydroxyquinoline, add hydrochloric acid and stir well to mix well to obtain a mixture B.

[0057] (3) Finally, the mixture B obtained in step (2) is placed in an oven at 180° C. for 12 h, cooled to room temperature, washed with anhydrous ethanol, and dried to obtain an all-inorganic vacancy ordered double perovskite luminescent material.

[0058] The all-inorganic vacancy ordered double perovskite luminescent material obtained in this example was subjected to X-ray photoelectron spectroscopy. From the overall spectrum, it can be seen that nitrogen and oxygen elements were successfully doped, indicating that 8-Hydroxyquinoline will produce luminescence regulation after combining with the matrix.

[0059] Example 6

[0060] The CsCl and ZrCl in the all-inorganic vacancy ordered double perovskite luminescent material prepared in the embodiment 4 The molar ratio is CsCl:ZrCl 4 =2:1, Sb 2 O 3 The mass percentage of added is CsCl, ZrCl 4 2% of the total mass, the mass percentage of 8-Hydroxyquinoline added is CsCl, ZrCl 4 15% of the total mass, the specific preparation steps are as follows:

[0061] (1) Take CsCl and ZrCl in proportion 4 Add into the tetrafluoroethylene liner and mix to obtain mixture A.

[0062] (2) Then, Sb was added to the mixture A in step (1). 2 O 3 and 8-Hydroxyquinoline, add hydrochloric acid and stir well to mix well to obtain a mixture B.

[0063] (3) Finally, the mixture B obtained in step (2) is placed in an oven at 180° C. for 12 h, cooled to room temperature, washed with anhydrous ethanol, and dried to obtain an all-inorganic vacancy ordered double perovskite luminescent material.

[0064] The all-inorganic vacancy ordered double perovskite luminescent material obtained in this embodiment can emit different light under different excitations and will produce color change when heated under 365 conditions.

[0065] Example 7

[0066] The CsCl and ZrCl in the all-inorganic vacancy ordered double perovskite luminescent material prepared in the embodiment 4 The molar ratio is CsCl:ZrCl 4 =2:1, Sb 2 O 3 The mass percentage of added is CsCl, ZrCl 4 2% of the total mass, the mass percentage of 8-Hydroxyquinoline added is CsCl, ZrCl 4 20% of the total mass, the specific preparation steps are as follows:

[0067] (1) Take CsCl and ZrCl in proportion 4 Add into the tetrafluoroethylene liner and mix to obtain mixture A.

[0068] (2) Then, Sb was added to the mixture A in step (1). 2 O3 and 8-Hydroxyquinoline, add hydrochloric acid and stir well to mix well to obtain a mixture B.

[0069] (3) Finally, the mixture B obtained in step (2) is placed in an oven at 180° C. for 12 h, cooled to room temperature, washed with anhydrous ethanol, and dried to obtain an all-inorganic vacancy ordered double perovskite luminescent material.

[0070] The XRD test of the all-inorganic vacancy ordered double perovskite luminescent material prepared in this embodiment is as follows: Figure 2 As shown in the figure, it can be seen that the material is a pure phase all-inorganic vacancy ordered double perovskite. The spectrum under different excitations is also obtained from the material test.

[0071] Example 8

[0072] The CsCl and ZrCl in the all-inorganic vacancy ordered double perovskite luminescent material prepared in the embodiment 4 The molar ratio is CsCl:ZrCl 4 =2:1, Sb 2 O 3 The mass percentage of added is CsCl, ZrCl 4 2% of the total mass, the mass percentage of 8-Hydroxyquinoline added is CsCl, ZrCl 4 40% of the total mass, the specific preparation steps are as follows:

[0073] (1) Take CsCl and ZrCl in proportion 4 Add into the tetrafluoroethylene liner and mix to obtain mixture A.

[0074] (2) Then, Sb was added to the mixture A in step (1). 2 O 3 and 8-Hydroxyquinoline, add hydrochloric acid and stir well to mix well to obtain a mixture B.

[0075] (3) Finally, the mixture B obtained in step (2) is placed in an oven at 180° C. for 12 h, cooled to room temperature, washed with anhydrous ethanol, and dried to obtain an all-inorganic vacancy ordered double perovskite luminescent material.

[0076] The excitation spectrum and emission spectrum of the all-inorganic vacancy ordered double perovskite luminescent material obtained in this example under 365nm laser show that the material emits visible green light.

[0077] Example 9

[0078] The CsCl and ZrCl in the all-inorganic vacancy ordered double perovskite luminescent material prepared in the embodiment 4 The molar ratio is CsCl:ZrCl 4 =2:1, Sb 2 O 3 The mass percentage of added is CsCl, ZrCl 4 10% of the total mass, the mass percentage of 8-Hydroxyquinoline added is CsCl, ZrCl 4 1% of the total mass, the specific preparation steps are as follows:

[0079] (1) Take CsCl and ZrCl in proportion 4 Add into the tetrafluoroethylene liner and mix to obtain mixture A.

[0080] (2) Then, Sb was added to the mixture A in step (1). 2 O 3 and 8-Hydroxyquinoline, add hydrochloric acid and stir well to mix well to obtain a mixture B.

[0081] (3) Finally, the mixture B obtained in step (2) is placed in an oven at 180° C. for 12 h, cooled to room temperature, washed with anhydrous ethanol, and dried to obtain an all-inorganic vacancy ordered double perovskite luminescent material.

[0082] The XRD test of the all-inorganic vacancy ordered double perovskite luminescent material synthesized in this embodiment is as follows: Figure 2 As shown in the figure, it can be observed that the obtained material is a pure phase all-inorganic vacancy ordered double perovskite and can be used as Figure 5 Visible orange light used in the application display.

[0083] Example 10

[0084] The CsCl and ZrCl in the all-inorganic vacancy ordered double perovskite luminescent material prepared in the embodiment 4 The molar ratio is CsCl:ZrCl 4 =2:1, Sb 2 O 3 The mass percentage of added is CsCl, ZrCl 4 10% of the total mass, the mass percentage of 8-Hydroxyquinoline added is CsCl, ZrCl 4 5% of the total mass, the specific preparation steps are as follows:

[0085] (1) Take CsCl and ZrCl in proportion 4 Add into the tetrafluoroethylene liner and mix to obtain mixture A.

[0086] (2) Then, Sb was added to the mixture A in step (1). 2 O 3 and 8-Hydroxyquinoline, add hydrochloric acid and stir well to mix well to obtain a mixture B.

[0087] (3) Finally, the mixture B obtained in step (2) is placed in an oven at 180° C. for 12 h, cooled to room temperature, washed with anhydrous ethanol, and dried to obtain an all-inorganic vacancy ordered double perovskite luminescent material.

[0088] The excitation spectrum and emission spectrum of the all-inorganic vacancy ordered double perovskite luminescent material obtained in this embodiment under 365nm laser show that the material emits visible orange light.

[0089] Embodiment 11

[0090] This embodiment is the first comparative example, which is as follows:

[0091] As a comparison, the difference between this embodiment and embodiment 1 is that Sb is not doped 3+ and 8-Hydroxyquinoline, the specific preparation steps are as follows:

[0092] (1) Take CsCl and ZrCl in proportion 4 Add into the tetrafluoroethylene liner and mix to obtain mixture A.

[0093] (2) Then, Sb was added to the mixture A in step (1). 2 O 3， Add hydrochloric acid and stir thoroughly to mix evenly to obtain mixture B.

[0094] (3) Finally, the mixture B obtained in step (2) is placed in an oven and kept at 180° C. for 12 h. After cooling to room temperature, it is washed with anhydrous ethanol and dried to obtain a fully inorganic vacancy ordered double perovskite light-emitting material.

[0095] The crystal structure of the all-inorganic vacancy ordered double perovskite luminescent material obtained in this embodiment is shown in FIG. Figure 1 As shown in the figure, it can be seen that the all-inorganic vacancy ordered double perovskite luminescent material is a standard cubic phase with two rings doped next to it. The material obtained in this example was excited with 365nm and the luminescence of visible light was found to be not as good as that in Example 1. The reason is that the doping of Sb 3+ After doping with 8-Hydroxyquinoline, Sb 3+The absorption at 365nm is increased, and the regulatory effect of 8-Hydroxyquinoline is used to form an emission triplet STE state from a singlet STE intermediate, thereby responding more actively to the 365nm laser, achieving a better luminescence effect, while retaining the response to the 254nm laser.

[0096] Example 12

[0097] This embodiment is the second comparative example, which is as follows:

[0098] As a comparison, the difference between this embodiment and embodiment 1 is that 8-Hydroxyquinoline, Sb 2 O 3 The mass percentage of added is CsCl, ZrCl 4 1% of the total mass, the specific preparation steps are as follows:

[0099] (1) Take CsCl and ZrCl in proportion 4 Add into the tetrafluoroethylene liner and mix to obtain mixture A.

[0100] (2) Then, Sb was added to the mixture A in step (1). 2 O 3 , add hydrochloric acid and stir thoroughly to mix evenly to obtain mixture B.

[0101] (3) Finally, the mixture B obtained in step (2) is placed in an oven and kept at 180° C. for 12 h. After cooling to room temperature, it is washed with anhydrous ethanol and dried to obtain a fully inorganic vacancy ordered double perovskite light-emitting material.

[0102] The material obtained in this example is excited at 365 nm and only produces visible orange light. 3+ The energy level of the ion will be similar to that of Cs 2 ZrCl 6 The energy levels of the materials interact with each other to form a new energy level structure. However, compared with Example 1, due to the lack of regulation of Sb+ ions by 8-Hydroxyquinoline, the material cannot achieve color change of other lights, resulting in only visible orange light and reduced luminescence.

[0103] Embodiment 13

[0104] This embodiment is the third comparative example, which is as follows:

[0105] As a comparison, the difference between this embodiment and embodiment 1 is that Sb is not doped 3+ , the mass percentage of 8-Hydroxyquinoline added is CsCl, ZrCl 4 3% of the total mass, the specific preparation steps are as follows:

[0106] (1) Take CsCl and ZrCl in proportion 4 Add into the tetrafluoroethylene liner and mix to obtain mixture A.

[0107] (2) Then, 8-Hydroxyquinoline is added to the mixture A in step (1), and hydrochloric acid is added and stirred thoroughly to obtain a mixture B.

[0108] (3) Finally, the mixture B obtained in step (2) is placed in an oven and kept at 180° C. for 12 h. After cooling to room temperature, it is washed with anhydrous ethanol and dried to obtain a fully inorganic vacancy ordered double perovskite light-emitting material.

[0109] The material obtained in this embodiment makes the visible light turn green and reduces the change of other colors. The reason is that when the all-inorganic vacancy ordered double perovskite luminescent material is excited at 365nm, Sb 3+ Not only does the sensitizer absorb 365nm light, but it also serves as a luminescence center, converting the absorbed energy into visible orange luminescence.

[0110] Embodiment 14

[0111] The reaction principle in the above-mentioned Examples 1 to 10 is: Sb 3+ The energy level of the ion will be similar to that of Cs 2 ZrCl 6 The energy levels interact with each other to form a new energy level structure and Sb 3+ The doping of ions introduces new luminescence centers, which convert the sample into visible orange light under 365 excitation. 3+ Can be used as Cs under 365 stimulation 2 ZrCl 6 It is an excellent sensitizer and migration agent in Cs 2 ZrCl 6 8-Hydroxyquinoline is also doped in the reaction to regulate Sb 3+ The luminescence of the ions is converted into visible green light, and then the mixture of orange and green light in a certain proportion will produce visible yellow light, thus realizing the multiple luminescence of the material.

Claims

1. A method for preparing an all-inorganic vacancy ordered double perovskite luminescent material, characterized in that: Using Cs2ZrCl6 as the perovskite matrix, Sb 3+ The fully inorganic vacancy ordered double perovskite luminescent material is obtained by doping with 8-Hydroxyquinoline. The specific preparation steps are as follows: S1, An amount ratio of CsCl: ZrCl4 = 2 ~ 4: 1 ~ 2 weighed CsCl, ZrCl4 added to the tetrafluoroethylene liner to mix, to obtain a mixture A; S2. Add Sb2O3 and 8-Hydroxyquinoline to the obtained mixture A, and add hydrochloric acid to stir and mix well to obtain a mixture B; S3. Put the obtained mixture B into an oven for reaction, cool it to room temperature, wash it with anhydrous ethanol, and dry it to obtain a fully inorganic vacancy ordered double perovskite light-emitting material.

2. The method for preparing an all-inorganic vacancy ordered double perovskite luminescent material according to claim 1, characterized in that: In S2, the mass percentage of Sb2O3 added is 1% to 10% of the total mass of CsCl and ZrCl4; the mass percentage of 8-Hydroxyquinoline added is 3% to 40% of the total mass of CsCl and ZrCl4.

3. The method for preparing an all-inorganic vacancy ordered double perovskite luminescent material according to claim 1, characterized in that: In S3, the reaction condition in the oven is 170-190°C for 11-13 hours.

4. Application of an all-inorganic vacancy ordered double perovskite luminescent material, characterized in that: Application of all-inorganic vacancy-ordered double perovskite luminescent materials in triplet luminescence regulation and thermal responsive information encryption.

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