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CN-121992507-A - Organic-inorganic composite perovskite single crystal material and preparation method thereof

CN121992507ACN 121992507 ACN121992507 ACN 121992507ACN-121992507-A

Abstract

The invention discloses an organic-inorganic composite perovskite single crystal material and a preparation method thereof, which belong to the technical field of perovskite photoelectric functional materials, wherein the organic-inorganic composite perovskite single crystal material is obtained by combining organic cations based on A' position with inorganic cations, halogen anions and the like, can obtain stable single crystals on the premise of guaranteeing a three-dimensional perovskite lattice structure, pushes a luminescence peak to a blue light part, can be used as a gain medium or a laser light source on a short-wavelength sheet in a perovskite laser and also can be used for a healthy illumination scene, and can be compatible with multiple adjacent wave bands on the basis of luminescence of blue light, can be applied to high-precision full-color display and micro-display devices, and can be used as a high-color purity blue light pixel unit or an excitation source to obviously improve the display color gamut and color consistency.

Inventors

  • Quan Chenjing
  • XU BEIBEI
  • LI ZICHENG
  • DUAN XINYU
  • ZHOU ZEHUI
  • ZHANG CHIYU

Assignees

  • 浙江大学

Dates

Publication Date
20260508
Application Date
20260409

Claims (10)

  1. 1. An organic-inorganic composite perovskite single crystal material is characterized in that the single crystal material comprises the components of A ' 2 A n- 1 B n X 3n+1 , wherein A ' is an organic amine ion, A is a monovalent cation, B is a divalent metal cation, X is an anion, and n is a positive integer; A ' is phenethylamine ion PEA + , butylamine ion BA + , One or a combination of more than one of ethylamine ion EA + , S/R-p-bromo-1-phenethylamine ion S/R-Br-MBA, S/R-alpha-methylbenzylamine ion S/R-MBA and S/R-1-naphthylethylamine ion S/R-1-NEA, wherein A is cesium ion Cs + , methylamine ion MA + , One or more of formamidine ion FA + , ethylamine ion EA + , guanidine ion GA + and isopropylamine ion IPA + , wherein B is lead ion Pb 2+ , One or more of Sn 2+ , ge 2+ , in 2+ and Bi 2+ , wherein X is Cl - , One or more of bromide ions Br - and iodide ions I - .
  2. 2. The preparation method of the organic-inorganic composite perovskite single crystal film is characterized by comprising the following steps of: preparing a hole transport layer on clean glass by a spin coating method, and annealing in a nitrogen environment; Taking two pieces of annealed glass, oppositely arranging the two pieces of annealed glass, enabling a hole transport layer on the two pieces of glass to face to the inner side, injecting a precursor solution between the two pieces of glass to form a sandwich structure, and applying inward pressure to the two pieces of glass; heating the sandwich structure to a first temperature at a heating rate of 2-10 ℃ per hour under the pressure, maintaining for a preset time, cooling to a second temperature, and annealing; Naturally cooling the annealed sandwich structure, and stripping two pieces of glass to obtain the organic-inorganic composite perovskite single crystal film, wherein the film is composed of the material of claim 1.
  3. 3. The method of claim 2, wherein the glass is any one of ITO glass, FTO glass, quartz glass.
  4. 4. The method according to claim 2, wherein the hole transport layer is prepared by spin coating, and the spin-coated material is poly (N, N ' -bis (4-butylphenyl) -N, N ' -bis (phenyl) -benzidine), poly (9, 9-dioctylfluorene-co-bis-N, N ' - (4-butylphenyl) -diphenylamine), or poly (3, 4-ethylenedioxythiophene): poly (styrene sulfonate).
  5. 5. The method according to claim 2, wherein when the hole transport layer is prepared by spin coating, the hole transport layer is annealed at 100 to 150 ℃ for 10 to 15 minutes after spin coating.
  6. 6. The method of claim 2, wherein the precursor solution has a concentration of 0.2-1.5 mmol and an injection volume of 50-100 μl.
  7. 7. The method of claim 2, wherein the applied pressure is 0-20N.
  8. 8. The method of claim 2, wherein the sandwich structure is heated to 50-150 ℃ at a heating rate of 2-10 ℃ per hour for 0.1-5 hours, cooled to 20-100 ℃ and annealed for 5-36 hours.
  9. 9. A perovskite laser employing the single crystal material of claim 1 as a gain medium or short wavelength on-chip laser source.
  10. 10. Use of an organic-inorganic composite perovskite single crystal material as claimed in claim 1 in a display device, a light source system or a health lighting system.

Description

Organic-inorganic composite perovskite single crystal material and preparation method thereof Technical Field The invention belongs to the technical field of perovskite photoelectric functional materials, and particularly relates to an organic-inorganic composite perovskite single crystal material and a preparation method thereof. Background In the perovskite luminescent material, the pure blue light emitting component is a core basic unit for display (such as RGB pixels, micro-LEDs) and white light illumination (blue light excited fluorescent powder), the color purity and stability of the pure blue light emitting component directly determine the performance of the device, and the blue-green, yellow-green and other adjacent band components are necessary supplements for wide color gamut display and multicolor light source cooperation. However, the prior related materials have the following technical bottlenecks: 1. the high color purity-high performance of the pure blue perovskite is difficult to be compatible with the existing pure Lan Guanggai titanium ore (especially single crystal system), the color purity is not up to standard, the light-emitting half-width is large, the emission peak is easy to Xiang Qingguang shift, the color coordinate requirement of the pure blue light in the display field is not met, or the light-emitting efficiency and the environmental stability are greatly reduced after the high color purity is realized, such as the spectrum shift under the humidity/light irradiation, and the performance requirement of core application cannot be met. 2. In the prior art, if a blue-green, yellow-green and other adjacent-band luminophore is obtained from a pure blue perovskite adjusting component, element proportion is often required to be greatly changed, defect density of a new-band component is increased, problems of rapid luminous intensity attenuation, spectrum mixing (half-peak width increase) and the like occur, and the problems cannot be cooperated with the performance of the pure blue component. 3. The compatibility of multi-band luminescence in a single crystal system is poor, the prior art is difficult to realize stable pure blue light and adjacent band luminescence simultaneously in the same perovskite single crystal system, or the components of a pure blue light unit and other band units are seriously separated, or the luminescence performance difference of different positions on the surface of the single crystal is obvious, for example, the pure blue light area has high efficiency, the stability of other band areas is poor, and the cooperative application requirements of multi-band devices cannot be adapted. These defects make the existing materials not compatible with pure blue light with high cost performance and multiple adjacent bands, limit the application of the existing materials in scenes such as high-precision display, multicolor light sources and the like, and need to develop perovskite luminescent material systems adapting to the requirements. Disclosure of Invention Aiming at the problems existing in the prior art, the embodiment of the application aims to provide an organic-inorganic composite perovskite single crystal material and a preparation method thereof. According to a first aspect of an embodiment of the present application, there is provided an organic-inorganic composite perovskite single crystal material, the single crystal material comprising a ' 2An-1BnX3n+1, wherein a ' is an organic amine ion, a is a monovalent cation, B is a divalent metal cation, X is an anion, n is a positive integer, a ' is a phenethylamine ion PEA +, a butylamine ion BA +, One or a combination of more than one of ethylamine ion EA +, S/R-p-bromo-1-phenethylamine ion S/R-Br-MBA, S/R-alpha-methylbenzylamine ion S/R-MBA and S/R-1-naphthylethylamine ion S/R-1-NEA, wherein A is cesium ion Cs +, methylamine ion MA +, One or more of formamidine ion FA +, ethylamine ion EA +, guanidine ion GA + and isopropylamine ion IPA +, wherein B is lead ion Pb 2+, One or more of Sn 2+, ge 2+, in 2+ and Bi 2+, wherein X is Cl -, One or more of bromide ions Br - and iodide ions I -. According to a second aspect of an embodiment of the present application, there is provided a method for preparing an organic-inorganic composite perovskite single crystal material, including: preparing a hole transport layer on clean glass by a spin coating method, and annealing in a nitrogen environment; Taking two pieces of annealed glass, oppositely arranging the two pieces of annealed glass, enabling a hole transport layer on the two pieces of glass to face to the inner side, injecting a precursor solution between the two pieces of glass to form a sandwich structure, and applying inward pressure to the two pieces of glass; heating the sandwich structure to a first temperature at a heating rate of 2-10 ℃ per hour under the pressure, maintaining for a preset time, cooling to a second temperature, and annealing; natur