Preparation method of perovskite micron-ring array

A technology of perovskite and perovskite precursors, applied in the direction of lead halide, etc., can solve the problems of high cost, complex equipment, and difficult operation process, and achieve fast response, simple equipment, and low operation process difficulty.

Active Publication Date: 2018-03-02
SOUTHEAST UNIV
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Problems solved by technology

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 is difficult, and the cost is high;

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  • Preparation method of perovskite micron-ring array
  • Preparation method of perovskite micron-ring array
  • Preparation method of perovskite micron-ring array

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Example Embodiment

[0027] Example 1

[0028] All inorganic CsPbBr with an inner diameter of 2.5um 3 Preparation of perovskite micro ring array

[0029] 1) The glass substrate is sequentially used with a volume ratio of 3:1 H 2 SO 4 / H 2 O 2 Ultrasonic cleaning with mixed solution, acetone, isopropanol, ethanol and deionized water; then dried with nitrogen and placed in an oven to dry for later use. Drop the polystyrene microsphere suspension on the cleaned glass substrate at 80rpm After the water has evaporated, the colloidal monolayer template is obtained by spin-coating at a speed of 90°C. The particle size of the polystyrene microspheres is 8um, and the solid content of the emulsion of the polystyrene microspheres in the polystyrene microsphere suspension is 5.0wt%;

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

[0031] 3) Spin-coating the perovskite precursor solution on the colloidal single-layer template at a spin-co...

Example Embodiment

[0034] Example 2

[0035] All inorganic CsPbBr with an inner diameter of 6um 3 The preparation method of perovskite micro ring array includes the following steps:

[0036] 1) The glass substrate is sequentially used with a volume ratio of 7:3 H 2 SO 4 / H 2 O 2 The mixed solution, acetone, isopropanol, ethanol and deionized water are ultrasonically cleaned; then dried with nitrogen and placed in an oven to dry for later use. Drop the suspension of polystyrene microspheres on the cleaned glass substrate, spin-coated at a speed of 60 rpm, after the water has evaporated, place it on a heating table at 100°C for 20 hours or 110°C for 1 hour, and naturally cool to room temperature to obtain A colloidal single-layer template, in which the particle size of the polystyrene microspheres is 10um, and the solid content of the emulsion of the polystyrene microspheres in the polystyrene microsphere suspension is 2.5wt%;

[0037] 2) Combine 0.8mmolCsBr and 1mmolPbBr 2 Dissolve in 10mL dimethyl sul...

Example Embodiment

[0040] Example 3

[0041] All inorganic CsPb(Cl 0.3 Br 0.7 ) 3 Preparation of perovskite micro ring array

[0042] 1) Use H with a volume ratio of 8:3 for the glass substrate in turn 2 SO 4 / H 2 O 2 The mixed solution, acetone, isopropanol, ethanol and deionized water are ultrasonically cleaned; then dried with nitrogen and placed in an oven to dry for later use. Drop the suspension of polystyrene microspheres on the cleaned glass substrate, spin-coated at a speed of 80 rpm, after the water has evaporated, place it on a heating table and heat it at 110°C for 1 hour and then naturally cool to room temperature to obtain a colloidal monolayer template; The particle size of the polystyrene microspheres is 9um, and the emulsion solid content of the polystyrene microspheres in the polystyrene microsphere suspension is 3.5wt%;

[0043] 2) Add 1mmolCsBr, 0.7mmolPbBr 2 And 0.3mmolPbCl 2 After mixing, dissolve in 10mL dimethyl sulfoxide to obtain a Cl ion-containing perovskite precursor solut...

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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...

Claims

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Application Information

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IPC IPC(8): C01G21/16
Inventor 王春雷徐敬坤徐淑宏祁正青吕昌贵崔一平
Owner SOUTHEAST UNIV
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