Preparation method of large-size rare earth doped phenylethylamine lead bromide perovskite single crystal and perovskite single crystal

Abstract

The invention particularly relates to a preparation method of a large-size rare-earth-doped phenylethylamine lead bromide perovskite single crystal and the perovskite single crystal, and solves the technical problems that the existing large-size rare-earth-doped two-dimensional perovskite single crystal needs higher nucleation supersaturation degree, the preparation period is long, and part of rare-earth bromide is extremely easy to absorb moisture, so that the crystal quality is reduced. The preparation method of the large-size rare earth doped phenylethylamine lead bromide perovskite single crystal and the perovskite single crystal comprise the following steps: 1) weighing; the preparation method comprises the following steps: weighing phenylethylamine hydrobromide, lead bromide and rare earth metal bromide, and putting into a glass bottle; 2) obtaining a precursor solution; 3) obtaining a millimeter-sized crystal; 4) screening seed crystals; (5) growing seed crystals; in the step (4), the open container B stands at a preset temperature until the seed crystal continues to grow into the rare earth doped phenylethylamine lead bromide perovskite single crystal with the preset size, the size can reach the centimeter level, and an important supporting effect is achieved for promoting performance research of the rare earth doped two-dimensional perovskite single crystal.

Description

Technical Field

[0001] The present invention specifically relates to a method for preparing a large-size rare earth-doped phenylethylamine lead bromide perovskite single crystal and the perovskite single crystal. Background Art

[0002] Perovskite materials have excellent photoelectric properties. Compared with three-dimensional perovskites, the alternating layered structure of organic macromolecules and inorganic layers of two-dimensional perovskites greatly enhances their stability and quantum confinement effect, and has been widely used. Compared with polycrystalline and single crystals, they have fewer grain boundary defects and better photoelectric properties.

[0003] Studies have shown that rare earth doping can adjust the band gap structure of perovskite, thereby adjusting the luminescence properties of perovskite. Since large-sized two-dimensional lead-bromine perovskite single crystals will spontaneously exclude heterogeneous ions when growing, their doping is more difficult than nanocrystals and micron crystals. At present, rare earth-doped three-dimensional perovskite single crystals and millimeter-sized two-dimensional perovskite single crystals have been studied. For example, Chinese patent CN114517332A discloses "an erbium-doped two-dimensional perovskite single crystal, its preparation method and photodetector", but the preparation method and performance research of large-sized rare earth-doped two-dimensional perovskite single crystals have not been reported. Although Chinese patent CNCN114395801A discloses "a large-sized, high-quality two-dimensional halide perovskite single crystal preparation method", experiments show that rare earth-doped solutions require higher nucleation supersaturation, the seed crystal preparation cycle is as long as 2 weeks, and some rare earth bromides are very easy to absorb moisture. When the solvent volatilization method is used, the rare earth-doped crystals are easy to absorb moisture during growth and reduce the quality. Therefore, it is necessary to develop new technical solutions for the preparation of large-size rare earth-doped perovskites. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problems that the preparation of existing large-sized rare earth-doped two-dimensional perovskite single crystals requires higher nucleation supersaturation, has a long preparation cycle, and some rare earth bromides are very easy to absorb moisture, resulting in reduced crystal quality. A method for preparing a large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal and a perovskite single crystal are provided.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A method for preparing a large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal is special in that it comprises the following steps:

[0007] 1) Weighing;

[0008] Weigh phenylethylamine hydrobromide, lead bromide, and rare earth metal bromide into a glass bottle;

[0009] 2) obtaining a precursor solution;

[0010] Add N,N-dimethylformamide to a glass bottle, heat and stir until completely dissolved to obtain a precursor solution;

[0011] 3) Obtaining millimeter-sized crystals;

[0012] The precursor solution is filtered and placed in an open container A, which is then sealed and connected to the outside through a small hole, and placed in a preset temperature and low humidity environment to volatilize until multiple crystals larger than a millimeter are precipitated; the low humidity environment refers to a relative humidity of less than 40%;

[0013] 4) Screening seed crystals;

[0014] The solution in the open container A is filtered again and placed in the open container B; a piece of independently grown crystals larger than a millimeter is taken out as a seed crystal and placed in the open container B; the open container B is sealed and heated until the seed crystal is partially dissolved, and the heating is stopped and slowly cooled to a preset temperature;

[0015] 5) Seed crystal growth;

[0016] The open container B is placed at a preset temperature until the seed crystal continues to grow into a rare earth-doped phenylethylamine lead bromide perovskite single crystal of a predetermined size.

[0017] Furthermore, in step 1), the molar numbers of phenethylamine hydrobromide, lead bromide and rare earth metal bromide are n1, n2 and n3 respectively, and n1:n2:n3=2:1:x, x=0.05-0.5.

[0018] Furthermore, in step 1), the rare earth metal bromide is any one of NdBr3, CeBr3, and ErBr3.

[0019] Further, step 2) is specifically as follows:

[0020] After adding N,N-dimethylformamide to the glass bottle, heat it to 30°C to 85°C using a heating table or a magnetic stirrer, and stir it until it is completely dissolved to obtain a precursor solution with a lead concentration of 1.3 mol / L to 1.5 mol / L.

[0021] Furthermore, the preset temperature is room temperature, which is 10°C to 25°C.

[0022] Further, step 3) is specifically as follows:

[0023] The precursor solution is filtered through a polytetrafluoroethylene filter head with a pore size of 0.45 micron or 0.22 micron. The filtered solution is placed in an open container A. The open container A is then sealed and a small hole with a diameter of 0.5-1 mm is punched. The container is placed in a room temperature and low humidity environment to evaporate until multiple crystals larger than the millimeter size are precipitated.

[0024] Furthermore, in step 3), above the millimeter level means greater than or equal to 2 millimeters.

[0025] Furthermore, the method further comprises step 6):

[0026] The rare earth-doped phenylethylamine lead bromide perovskite single crystal of a predetermined size is taken out from the open container B, washed with chlorobenzene or cyclohexane to remove the solution attached to the surface, and then vacuum dried at room temperature and stored away from light.

[0027] Furthermore, the length and width of the rare earth-doped phenylethylamine lead bromide perovskite single crystal of predetermined size are both in the order of centimeters, and the thickness is in the order of millimeters.

[0028] A large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal, which is special in that: it is prepared by the above-mentioned large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal preparation method;

[0029] The chemical formula of rare earth doped phenylethylamine lead bromide perovskite single crystal is (C8H 12 N)2PbBr4:Re 3+ , wherein Re represents any one of Nd, Ce, and Er.

[0030] Beneficial effects of the present invention:

[0031] 1. The present invention discloses a method for preparing a large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal. The rare earth-doped phenylethylamine lead bromide perovskite single crystal is prepared using phenylethylamine hydrobromide, lead bromide and rare earth metal bromide as raw materials. The size of the prepared rare earth-doped phenylethylamine lead bromide perovskite single crystal can reach the centimeter level, which can meet the needs of most photoelectric detection devices and plays an important supporting role in promoting the performance research of rare earth-doped two-dimensional perovskite single crystals.

[0032] 2. The present invention discloses a method for preparing large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystals. The raw materials (i.e., phenylethylamine hydrobromide, lead bromide, and rare earth metal bromide) are dissolved by heating to obtain a precursor solution that is a supersaturated solution. On this basis, nucleation is carried out by evaporating the solvent, thereby offsetting the nucleation difficulties caused by anomalous rare earth ions and shortening the nucleation time.

[0033] 3. The present invention discloses a method for preparing a large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal. After the seed crystal is introduced, the open container B is sealed, and the supersaturation of the solution itself is used to grow the seed crystal into a large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal, thereby avoiding the problem of water absorption and deterioration of the rare earth-doped phenylethylamine lead bromide perovskite single crystal during its growth. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a flow chart of Example 1 of a method for preparing a large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal according to the present invention;

[0035] FIG2( a ) is a schematic diagram showing the morphology and size of a rare earth-doped phenylethylamine lead bromide perovskite single crystal prepared by Example 1 of a method for preparing a large-size rare earth-doped phenylethylamine lead bromide perovskite single crystal of the present invention;

[0036] FIG2( b ) is a schematic diagram showing the morphology and size of a rare earth-doped phenylethylamine lead bromide perovskite single crystal prepared by Example 2 of a method for preparing a large-size rare earth-doped phenylethylamine lead bromide perovskite single crystal of the present invention;

[0037] FIG2( c ) is a schematic diagram showing the morphology and size of a single crystal obtained by preparing a large-size rare earth-doped lead phenylethylamine bromide perovskite single crystal in a comparative example without adding rare earth metal bromide;

[0038] Figure 3 The absorption spectrum (dashed line) and emission spectrum (solid line) of the crystals prepared in Example 1 (blue), 2 (red) and Comparative Example (black) of a large-size rare earth-doped phenylethylamine lead bromide perovskite single crystal preparation method of the present invention;

[0039] Figure 4 This is a crystal X-ray photoelectron energy spectrum diagram of Example 2 of the method for preparing a large-size rare earth-doped phenylethylamine lead bromide perovskite single crystal of the present invention and the crystal obtained in the comparative example. DETAILED DESCRIPTION

[0040] 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.

[0041] Example 1

[0042] A method for preparing a large-size rare earth-doped phenylethylamine lead bromide perovskite single crystal, such as Figure 1 As shown, at room temperature 10°C, weigh 20 mmol of phenylethylamine hydrobromide (C8H 12NBr), 10mmol lead bromide (PbBr2) and 0.5mmol neodymium bromide (NdBr3) are placed in a clean glass bottle; then 7.695mL of N,N-dimethylformamide (DMF) is added to the glass bottle, heated to 30°C on a heating table and stirred until completely dissolved to prepare a precursor solution with a concentration of 1.3mol / L (expressed as the concentration of lead); the precursor solution is filtered while hot using a polytetrafluoroethylene filter head with a pore size of 0.45 microns, and then placed in a clean 100mL glass beaker, and the beaker is sealed with tin foil, a small hole (with a diameter of 1mm) is pierced in the tin foil with a 10mL syringe needle, and placed in a dry environment for volatilization, and crystals with a size of more than millimeters are precipitated within 1 week. The solution was filtered into another clean 100mL beaker, and a piece of independently grown crystal was selected from the precipitated crystals as a seed crystal and added near the center of the bottom thereof to prevent the seed crystal from touching the side wall of the container during growth. The beaker was sealed with tin foil, and the tin foil was firmly tied to the outside of the beaker with tape and sealed. The whole was placed on a 60°C heating table for heating. After 1 minute, the seed crystal was observed to be significantly dissolved. The heating was stopped and slowly cooled to room temperature 10°C. The beaker was then transferred to a quiet place for growth for 10 days to obtain a centimeter-scale two-dimensional lead-bromide perovskite single crystal (i.e., rare earth-doped phenylethylamine lead-bromide perovskite single crystal), as shown in Figure 2(a). As can be seen from Figure 2(a), the crystal is hexagonal, with a size of centimeters and high transparency. The large-size two-dimensional lead-bromide perovskite single crystal was taken out with tweezers, and the surface solution was absorbed with filter paper, and then quickly rinsed with chlorobenzene. The room temperature crystal was vacuum dried and stored in the dark.

[0043] Example 2

[0044] At room temperature of 15°C, weigh 20mmol of phenylethylamine hydrobromide (PEABr), 10mmol of lead bromide (PbBr2) and 2mmol of neodymium bromide (NdBr3), and place them in a clean glass bottle; then add 7.4mL of N,N-dimethylformamide (DMF) to the glass bottle, heat to 40°C with a magnetic stirrer and stir until completely dissolved to prepare a precursor solution with a concentration of 1.35mol / L (expressed as lead concentration); filter the precursor solution while hot using a polytetrafluoroethylene filter head with a pore size of 0.22 microns, place it in a clean 100mL glass beaker, and seal the beaker with tin foil, poke a small hole in the tin foil with a 10mL syringe needle, and place it in a dry environment to evaporate, and crystals larger than millimeter size will precipitate within 1 week. The solution was filtered into another clean 100mL beaker, and a transparent, independently grown crystal was added as a seed crystal. The beaker was sealed with tin foil, and the tin foil was tied to the outside of the beaker with tape. The whole was placed on a 60°C heating table for heating. After 3 minutes, the seed crystal was observed to be significantly dissolved. The heating was stopped and slowly cooled to room temperature 15°C. The beaker was then transferred to a quiet place. After 10 days of growth, a centimeter-scale two-dimensional lead-bromine perovskite single crystal was obtained, as shown in Figure 2(b). As can be seen from Figure 2(b), the original crystal was hexagonal and broke from the middle of the crystal when it was taken out, but it still had a centimeter-scale size. The large-size two-dimensional lead-bromine perovskite single crystal was taken out with tweezers, and the surface solution was absorbed with filter paper, and then it was quickly rinsed with cyclohexane. The crystal was vacuum dried at room temperature and stored away from light.

[0045] Comparative Example

[0046] At room temperature 20℃, weigh 3.2340g of phenylethylamine hydrobromide (PEABr) and 2.9360g of lead bromide (PbBr2) in a glass reagent bottle, add 5.335mL of N,N-dimethylformamide (DMF) (the molar number of rare earth metal bromide (ReBr3) n2=0), heat and stir to completely dissolve, make a 1.5mol / L solution, filter the solution and transfer it to a 100ml glass beaker, put on plastic wrap, use a 10mL syringe needle to poke a small hole in the tin foil, place it in a dry environment to evaporate, and crystals will precipitate within 1 week. Filter the solution into a new clean 100mL beaker, and select a piece of independent growth from the precipitated crystals as a seed crystal and add it into it, seal the beaker with tin foil, and tie the tin foil to the outside of the beaker with tape, and place the whole on a 70℃ heating table to heat. After 5 minutes, it was observed that the crystals were significantly dissolved, and the beaker was transferred to a quiet place for growth. Within 10 days, the crystal size reached the centimeter level, as shown in Figure 2(c). The crystal was removed with tweezers, the surface solution was absorbed with filter paper, and stored in the dark.

[0047] like Figure 3As shown, the absorption spectrum (dashed line) and emission spectrum (solid line) of the crystal prepared according to Example 1, Example 2 and the comparative example by the method of the present invention, wherein the horizontal axis represents the absorption wavelength or the emission wavelength, and the vertical axis represents the normalized value of the absorption intensity or the normalized value of the emission intensity at the wavelength; the excitation light source used for the emission spectrum is a Xe lamp, and the blue color represents the absorption spectrum (dashed line) and emission spectrum (solid line) of the crystal prepared in Example 1, and the wavelength after passing through the grating is 350nm; the red color represents the absorption spectrum (dashed line) and emission spectrum (solid line) of the crystal prepared in Example 2, and the wavelength after passing through the grating is 350nm; the black color represents the absorption spectrum (dashed line) and emission spectrum (solid line) of the crystal prepared in the comparative example, and the wavelength after passing through the grating is 350nm.

[0048] like Figure 4 As shown, the X-ray photoelectron energy spectrum of the crystals prepared according to Example 2 and the comparative example by the method of the present invention is shown. The horizontal axis represents the binding energy, the vertical axis represents the signal intensity, and the Figure 4 It can be seen that the characteristic peaks of the corresponding orbits of elements C, Pb, and Br can be seen in the crystals prepared according to Example 2 and the comparative example. When the binding energy is between 980 eV and 1020 eV, the characteristic peak of the 3d orbit of the doped Nd element can be seen.

[0049] Example 3

[0050] At room temperature of 25°C, weigh 20mmol of phenylethylamine hydrobromide (PEABr), 10mmol of lead bromide (PbBr2) and 5mmol of neodymium bromide (NdBr3), and place them in a clean glass bottle; then add 7.15mL of N,N-dimethylformamide (DMF) to the glass bottle, heat to 85°C with a magnetic stirrer and stir until completely dissolved to prepare a precursor solution with a concentration of 1.4mol / L; filter the precursor solution with a polytetrafluoroethylene filter head with a pore size of 0.22 microns, put it into a clean 100mL glass beaker, and seal the beaker with tin foil, use a 10mL syringe needle to poke a small hole in the tin foil, and place it in a dry environment to evaporate, and crystals with a size of more than millimeters will precipitate within 1 week. The solution was filtered into another clean 100mL beaker, and an independently grown crystal was added as a seed crystal. The beaker was sealed with tin foil, and the tin foil was tied to the outside of the beaker with tape. The whole was placed on a 60°C heating table for heating. After 5 minutes, the seed crystal was observed to be significantly dissolved. The heating was stopped and slowly cooled to room temperature 25°C. The beaker was then transferred to a quiet place and grown for 15 days to obtain a centimeter-scale two-dimensional lead-bromine perovskite single crystal. The large-sized two-dimensional lead-bromine perovskite single crystal was taken out with tweezers, and the surface solution was absorbed with filter paper, and then quickly rinsed with chlorobenzene. The crystal was vacuum dried at room temperature and stored away from light.

[0051] Example 4

[0052] At room temperature of 20°C, weigh 10mmol of phenylethylamine hydrobromide (PEABr), 5mmol of lead bromide (PbBr2) and 1mmol of erbium bromide (ErBr3), and place them in a clean glass bottle; then add 3.85mL of N,N-dimethylformamide (DMF) to the glass bottle, heat to 50°C with a magnetic stirrer and stir until completely dissolved to prepare a precursor solution with a concentration of 1.5mol / L (expressed as the concentration of lead); filter the precursor solution while hot using a polytetrafluoroethylene filter head with a pore size of 0.22 microns, place it in a clean 50mL glass beaker, and seal the beaker with tin foil, poke a small hole in the tin foil with a 10mL syringe needle, and place it in a dry environment to evaporate, and crystals with a size of more than millimeters will precipitate within 1 week. The solution was filtered into another clean 50mL beaker, and a transparent, independently grown crystal was added as a seed crystal. The beaker was sealed with tin foil, and the tin foil was tied to the outside of the beaker with tape. The whole was placed on a 60°C heating table for heating. After 4 minutes, the seed crystal was observed to be significantly dissolved. The heating was stopped and slowly cooled to room temperature 20°C. The beaker was transferred to a quiet place and grown for 10 days to obtain a centimeter-scale two-dimensional lead-bromine perovskite single crystal. The large-sized two-dimensional lead-bromine perovskite single crystal was taken out with tweezers, and the surface solution was absorbed with filter paper, and then it was quickly rinsed with cyclohexane. The crystal was vacuum dried and stored away from light.

[0053] Example 5

[0054] At room temperature of 25°C, weigh 16mmol of phenylethylamine hydrobromide (PEABr), 8mmol of lead bromide (PbBr2) and 2mmol of cerium bromide (CeBr3) and place them in a clean glass bottle; then add 5.335mL of N,N-dimethylformamide (DMF) to the glass bottle, heat to 60°C with a magnetic stirrer and stir until completely dissolved to prepare a precursor solution with a concentration of 1.5mol / L (expressed as the concentration of lead); filter the precursor solution while hot using a polytetrafluoroethylene filter head with a pore size of 0.45 microns, place it in a clean 100mL glass beaker, and seal the beaker with tin foil, poke a small hole in the tin foil with a 10mL syringe needle, and place it in a dry environment to evaporate, and crystals with a size of more than millimeters will precipitate within 1 week. The solution was filtered into another clean 100mL beaker, and a transparent, independently grown crystal was added as a seed crystal. The beaker was sealed with tin foil, and the tin foil was tied to the outside of the beaker with tape. The whole was placed on a 70°C heating table for heating. After 3 minutes, the seed crystal was observed to be significantly dissolved. The heating was stopped and slowly cooled to room temperature 25°C. The beaker was then transferred to a quiet place for 15 days of growth to obtain a centimeter-scale two-dimensional lead-bromine perovskite single crystal. The large-sized two-dimensional lead-bromine perovskite single crystal was taken out with tweezers, and the surface solution was absorbed with filter paper, and then quickly rinsed with cyclohexane, and the crystal was vacuum dried and stored away from light.

[0055] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for preparing a large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal, characterized in that: The following steps are involved: 1) Weighing; Weigh phenylethylamine hydrobromide, lead bromide, and rare earth metal bromide into a glass bottle; 2) obtaining a precursor solution; Add N,N-dimethylformamide to a glass bottle, heat and stir until completely dissolved to obtain a precursor solution; 3) Obtaining millimeter-sized crystals; The precursor solution is filtered and placed in an open container A, which is then sealed and connected to the outside through a small hole, and placed in a preset temperature and low humidity environment for volatilization until multiple crystals larger than a millimeter are precipitated; the low humidity environment refers to a relative humidity of less than 40%; 4) Screening seed crystals; The solution in the open container A is filtered again and placed in the open container B; a piece of independently grown crystals larger than a millimeter is taken out as a seed crystal and placed in the open container B; the open container B is sealed and heated until the seed crystal is partially dissolved, and the heating is stopped and slowly cooled to a preset temperature; 5) Seed crystal growth; The open container B is placed at a preset temperature until the seed crystal continues to grow into a rare earth-doped phenylethylamine lead bromide perovskite single crystal of a predetermined size.

2. The method for preparing a large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal according to claim 1, characterized in that: In step 1), the molar numbers of the phenethylamine hydrobromide, lead bromide and rare earth metal bromide are n1, n2 and n3 respectively, and n1:n2:n3=2:1:x, x=0.05-0.

5.

3. The method for preparing a large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal according to claim 2, characterized in that: In step 1), the rare earth metal bromide is any one of NdBr3, CeBr3, and ErBr3.

4. The method for preparing a large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal according to claim 3, characterized in that: Step 2) is specifically as follows: After adding N,N-dimethylformamide to the glass bottle, heat it to 30°C to 85°C using a heating table or a magnetic stirrer, and stir it until it is completely dissolved to obtain a precursor solution with a lead concentration of 1.3 mol / L to 1.5 mol / L.

5. The method for preparing a large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal according to claim 4, characterized in that: The preset temperature is room temperature, which is 10°C to 25°C.

6. The method for preparing a large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal according to claim 5, characterized in that: Step 3) is specifically: The precursor solution is filtered through a polytetrafluoroethylene filter head with a pore size of 0.45 micron or 0.22 micron. The filtered solution is placed in an open container A. The open container A is then sealed and a small hole with a diameter of 0.5-1 mm is punched. The container is placed in a room temperature and low humidity environment to evaporate until multiple crystals larger than the millimeter size are precipitated.

7. The method for preparing a large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal according to claim 6, characterized in that: In step 3), the above millimeter level is greater than or equal to 2 millimeters.

8. The method for preparing a large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal according to claim 7, characterized in that: Also includes step 6): The rare earth-doped phenylethylamine lead bromide perovskite single crystal of a predetermined size is taken out from the open container B, washed with chlorobenzene or cyclohexane to remove the solution attached to the surface, and then vacuum dried at room temperature and stored away from light.

9. The method for preparing a large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal according to claim 8, characterized in that: The length and width of the rare earth-doped phenylethylamine lead bromide perovskite single crystal of predetermined size are both in the order of centimeters, and the thickness is in the order of millimeters.

10. A large-sized rare earth-doped phenylethylamine lead bromide perovskite single crystal, characterized in that: Prepared by the method for preparing a large-size rare earth-doped phenylethylamine lead bromide perovskite single crystal according to any one of claims 1 to 9; The rare earth doped phenylethylamine lead bromide perovskite single crystal chemical formula is (C8H 12 N)2PbBr4:Re 3+ , wherein Re represents any one of Nd, Ce, and Er.

Images