A kind of preparation method of perovskite micro ring array

Abstract

The invention discloses a preparation method of a perovskite micron-ring array which is a whole-inorganic CsPbX3 perovskite micron-ring array or a whole-inorganic CsPb(BrnAl-n)3 perovskite micron-ringarray, wherein X is one of chlorine ion, bromine ion or iodine ion, A is one of chlorine ion or iodine ion, 0 < n < 3. The preparation method includes the steps of: 1) production of a colloid single-layer template: spin-coating a substrate with a polystyrene microsphere suspension liquid to prepare the colloid single-layer template when water is evaporated out completely; 2) preparation of the perovskite micron-ring array: spin-coating the colloid single-layer template with a perovskite precursor solution, and when the coating is dried, soaking the template in methylbenzene to remove the polystyrene microspheres, and heating the template to form the perovskite micron-ring array. The method has simple operations and is low in operation difficulty. The size of the perovskite micron-rings and the emission wavelength of the perovskite micron-ring array are both adjustable.

Description

technical field

[0001] The invention relates to a method for preparing a perovskite micro-ring array, belonging to the technical field of all-inorganic perovskite. Background technique

[0002] The unique properties and applications of micro-ring structures in the fields of magnetism, optics, and optoelectronic devices have also attracted widespread attention. All-inorganic perovskite is a new type of semiconductor nanomaterial. Due to its excellent properties such as high stability, ultra-high fluorescence quantum yield, composition-dependent emission wavelength covering the entire visible light region, and narrow linewidth, it has become a research hotspot in recent years. CH that has been prepared so far 3 NH 3 PB 3 The perovskite hexagonal microsheet array is obtained by chemical vapor deposition on a boron nitride single-layer template obtained by photolithography. The disadvantage of this method is that the required equipment is complicated, the operation process i...

Examples

Embodiment 1

[0028] All-inorganic CsPbBr with an inner diameter of 2.5um 3 Fabrication of perovskite micro-ring arrays

[0029] 1) The glass substrate was sequentially filled with H at a volume ratio of 3:1 2 SO 4 / H 2 o 2 The mixed solution, acetone, isopropanol, ethanol and deionized water were ultrasonically cleaned; then dried with nitrogen and placed in an oven for later use, the suspension of polystyrene microspheres was dropped on the cleaned glass substrate, at 80rpm Spin-coat at a speed of 100°C, and after the water evaporates, a colloidal monolayer template is obtained, wherein the particle size of the polystyrene microspheres is 8um, and the solid content of the emulsion of the polystyrene particles in the polystyrene microsphere suspension is 5.0wt%;

[0030] 2) Mix 1mmolCsBr and 1mmolPbBr 2 Dissolve in 10mL dimethyl sulfoxide to obtain a precursor solution of perovskite;

[0031] 3) Spin-coat the perovskite precursor solution on the colloidal single-layer template at a s...

Embodiment 2

[0035] All-inorganic CsPbBr with an inner diameter of 6um 3 A method for preparing a perovskite micro-ring array, comprising the steps of:

[0036] 1) The glass substrate is sequentially filled with H at a volume ratio of 7:32 SO 4 / H 2 o 2 The mixed solution, acetone, isopropanol, ethanol and deionized water were ultrasonically cleaned; then dried with nitrogen and placed in an oven for later use. Drop the suspension of polystyrene microspheres on the cleaned glass substrate and spin-coat at a speed of 60 rpm. After the water evaporates, place it on a heating platform and heat it at 100°C for 20h or 110°C for 1h, then cool it down to room temperature naturally to obtain A colloidal monolayer template, wherein the particle size of the polystyrene microspheres is 10um, and the solid content of the polystyrene microparticle emulsion in the polystyrene microsphere suspension is 2.5wt%;

[0037] 2) Mix 0.8mmolCsBr and 1mmolPbBr 2 Dissolve in 10mL dimethyl sulfoxide to obtain ...

Embodiment 3

[0041] All-inorganic CsPb(Cl) with an inner diameter of 2.5um 0.3 Br 0.7 ) 3 Fabrication of perovskite micro-ring arrays

[0042] 1) The glass substrate was sequentially filled with H at a volume ratio of 8:3 2 SO 4 / H 2 o 2 The mixed solution, acetone, isopropanol, ethanol and deionized water were ultrasonically cleaned; then dried with nitrogen and placed in an oven for later use. Drop the suspension of polystyrene microspheres on the cleaned glass substrate and spin-coat at a speed of 80 rpm. After the water evaporates, place it on a heating table and heat it at 110°C for 1 hour, then cool it down to room temperature naturally to obtain a colloidal single-layer template; Wherein the particle size of the polystyrene microsphere is 9um, and the solid content of the emulsion of the polystyrene microsphere in the polystyrene microsphere suspension is 3.5wt%;

[0043] 2) 1mmolCsBr, 0.7mmolPbBr 2 and 0.3mmolPbCl 2 Dissolve in 10mL dimethyl sulfoxide after mixing to obtai...

technical field

[0001] The invention relates to a method for preparing a perovskite micro-ring array, belonging to the technical field of all-inorganic perovskite. Background technique

[0002] The unique properties and applications of micro-ring structures in the fields of magnetism, optics, and optoelectronic devices have also attracted widespread attention. All-inorganic perovskite is a new type of semiconductor nanomaterial. Due to its excellent properties such as high stability, ultra-high fluorescence quantum yield, composition-dependent emission wavelength covering the entire visible light region, and narrow linewidth, it has become a research hotspot in recent years. CH that has been prepared so far 3 NH 3 PB 3 The perovskite hexagonal microsheet array is obtained by chemical vapor deposition on a boron nitride single-layer template obtained by photolithography. The disadvantage of this method is that the required equipment is complicated, the operation process i...

Examples

Embodiment 1

[0028] All-inorganic CsPbBr with an inner diameter of 2.5um 3 Fabrication of perovskite micro-ring arrays

[0029] 1) The glass substrate was sequentially filled with H at a volume ratio of 3:1 2 SO 4 / H 2 o 2 The mixed solution, acetone, isopropanol, ethanol and deionized water were ultrasonically cleaned; then dried with nitrogen and placed in an oven for later use, the suspension of polystyrene microspheres was dropped on the cleaned glass substrate, at 80rpm Spin-coat at a speed of 100°C, and after the water evaporates, a colloidal monolayer template is obtained, wherein the particle size of the polystyrene microspheres is 8um, and the solid content of the emulsion of the polystyrene particles in the polystyrene microsphere suspension is 5.0wt%;

[0030] 2) Mix 1mmolCsBr and 1mmolPbBr 2 Dissolve in 10mL dimethyl sulfoxide to obtain a precursor solution of perovskite;

[0031] 3) Spin-coat the perovskite precursor solution on the colloidal single-layer template at a s...

Embodiment 2

[0035] All-inorganic CsPbBr with an inner diameter of 6um 3 A method for preparing a perovskite micro-ring array, comprising the steps of:

[0036] 1) The glass substrate is sequentially filled with H at a volume ratio of 7:32 SO 4 / H 2 o 2 The mixed solution, acetone, isopropanol, ethanol and deionized water were ultrasonically cleaned; then dried with nitrogen and placed in an oven for later use. Drop the suspension of polystyrene microspheres on the cleaned glass substrate and spin-coat at a speed of 60 rpm. After the water evaporates, place it on a heating platform and heat it at 100°C for 20h or 110°C for 1h, then cool it down to room temperature naturally to obtain A colloidal monolayer template, wherein the particle size of the polystyrene microspheres is 10um, and the solid content of the polystyrene microparticle emulsion in the polystyrene microsphere suspension is 2.5wt%;

[0037] 2) Mix 0.8mmolCsBr and 1mmolPbBr 2 Dissolve in 10mL dimethyl sulfoxide to obtain ...

Embodiment 3

[0041] All-inorganic CsPb(Cl) with an inner diameter of 2.5um 0.3 Br 0.7 ) 3 Fabrication of perovskite micro-ring arrays

[0042] 1) The glass substrate was sequentially filled with H at a volume ratio of 8:3 2 SO 4 / H 2 o 2 The mixed solution, acetone, isopropanol, ethanol and deionized water were ultrasonically cleaned; then dried with nitrogen and placed in an oven for later use. Drop the suspension of polystyrene microspheres on the cleaned glass substrate and spin-coat at a speed of 80 rpm. After the water evaporates, place it on a heating table and heat it at 110°C for 1 hour, then cool it down to room temperature naturally to obtain a colloidal single-layer template; Wherein the particle size of the polystyrene microsphere is 9um, and the solid content of the emulsion of the polystyrene microsphere in the polystyrene microsphere suspension is 3.5wt%;

[0043] 2) 1mmolCsBr, 0.7mmolPbBr 2 and 0.3mmolPbCl 2 Dissolve in 10mL dimethyl sulfoxide after mixing to obtai...

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