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Multi-element perovskite material, as well as preparation and application thereof

A perovskite material and perovskite technology, applied in the growth of polycrystalline materials, electrical components, crystal growth, etc., can solve the problems of large environmental pollution, high permeability, and poor regulation, and achieve a large application area, The effect of pollution reduction, large regulation and selection range

Active Publication Date: 2017-10-27
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the object of the present invention is to provide a multi-element perovskite material and its preparation and application, wherein by improving the types and proportions of the key chemical elements of the perovskite material, Compared with the prior art, it can effectively solve the problems that the existing double perovskite types are few, difficult to control, and cause great environmental pollution, and the present invention prepares the multi-element perovskite single crystal by adopting the hydrothermal method, and controls the hydrothermal reaction The conditions (such as feeding amount, hydrochloric acid concentration, reaction temperature and time, etc.) make the prepared multi-component perovskite single crystal have the advantages of large size, few defects, high purity and high permeability, especially suitable for photoelectric detection. Application in the field

Method used

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  • Multi-element perovskite material, as well as preparation and application thereof
  • Multi-element perovskite material, as well as preparation and application thereof
  • Multi-element perovskite material, as well as preparation and application thereof

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preparation example Construction

[0028] The above-mentioned multi-inorganic metal non-lead halide perovskite material with continuously adjustable components can be single crystal and can be used in photodetectors. The corresponding preparation method can be inorganic metal halide AX (A: Cs + ;X:Cl - ), B 1 X, B 2 X, B 3 X 3 , B 4 X 3 (B 1 , B 2 :Na + , Ag + ; B 3 , B 4 :In 3+ ,Bi 3+ ;X:Cl - ), and an inorganic solvent hydrochloric acid, for example, it can include the following steps:

[0029] (1) B can be weighed at room temperature (such as 10℃~30℃) according to the ratio of x:(1-x) 1 X and B 2 X, weigh B according to the ratio of the amount of matter in y:(1-y) 3 X 3 And B 4 X 3 And makes the B 1 X and the B 2 The sum of the amount of the two substances in X is equal to the B 3 X 3 And the B 4 X 3 The sum of the amount of the two substances; then weighed with B 1 X,B 2 X,B 3 X 3 , B 4 X 3 The amount of the substance and the same amount of AX, and mix well.

[0030] (2) Put the mixed powder in the polytetrafluoro...

Embodiment 1

[0034] In the preparation method of the perovskite single crystal in this embodiment, the specific preparation steps are as follows:

[0035] a) Clean the PTFE liner with deionized water for 10 minutes, clean the PTFE liner with acetone for 10 minutes, clean the PTFE liner with isopropanol for 10 minutes, and clean the PTFE liner with deionized water 10min, then blow dry with a nitrogen gun.

[0036] b) Weigh 0.3366g CsCl, 0.1433g AgCl, 0.0442g InCl 3 ,0.2523g BiCl 3 , Mix and place in the cleaned polytetrafluoroethylene liner, add 15ml of hydrochloric acid (the mass percentage concentration of hydrochloric acid can be 30%), and assemble the hydrothermal kettle.

[0037] c) Place the hydrothermal kettle in a muffle furnace, set the temperature of the muffle furnace to 30°C, raise it to 180°C for 2h, keep it for 10h, and then slowly decrease to room temperature at a rate of 1°C / h.

[0038] d) Take out the hydrothermal kettle in the muffle furnace, pour out the hydrochloric acid in the ...

Embodiment 2

[0040] In the preparation method of the perovskite single crystal in this embodiment, the specific preparation steps are as follows:

[0041] a) Clean the PTFE liner with deionized water for 10 minutes, clean the PTFE liner with acetone for 10 minutes, clean the PTFE liner with isopropanol for 10 minutes, and clean the PTFE liner with deionized water 10min, then blow dry with a nitrogen gun.

[0042] b) Weigh 0.3366g CsCl, 0.1433g AgCl, 0.0884g InCl 3 ,0.1892g BiCl 3 , Mix and place it in the cleaned polytetrafluoroethylene liner, add 15ml of hydrochloric acid (the concentration of hydrochloric acid can be 38% by mass), and assemble the hydrothermal kettle.

[0043] c) Put the hydrothermal kettle in the muffle furnace, and set the temperature of the muffle furnace to 30°C and raise it to 160°C for 2h, keep it for 10h, and then slowly decrease to room temperature at a rate of 1°C / h.

[0044] d) Take out the hydrothermal kettle in the muffle furnace, pour out the hydrochloric acid in th...

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Abstract

The invention discloses a multi-element perovskite material, as well as preparation and application thereof. The multi-element perovskite material is multi-element fully-inorganic metal non-lead halide salt and has a perovskite structure; the chemical formula of the multi-element perovskite meets: (the formula is shown in the description), wherein x is greater than or equal to 0 and less than or equal to 1, y is greater than or equal to 0 and less than or equal to 1, A is Cs<+>, B1, B2, B3 and B4 are Na<+>, Ag<+>, In<3+> and Bi<3+> respectively, and X is a halogen element. Through improvement on the varieties and proportion of the key chemical elements of the perovskite material, being compared with the prior art, the multi-element perovskite material can effectively solve the problems that the conventional multi-element perovskite material has few varieties, and is difficult to regulate and control, and high in environmental pollution.

Description

Technical field [0001] The invention belongs to the field of optoelectronic materials, and more specifically, relates to a multi-element perovskite material and its preparation and application. The multi-element perovskite material is a novel multi-element all-inorganic metal non-lead halide perovskite material. Background technique [0002] In recent years, new organic-inorganic hybrid perovskite materials have shown great application value in photovoltaic, luminescence, laser, photoelectric detection and other fields, and have become one of the hotspots of materials research in the world. However, due to the lack of stability under continuous exposure to light, humidity, and high temperature, perovskite batteries also face many challenges. In addition, the toxicity of lead has also raised questions about the long-term environmental impact of perovskite batteries. [0003] A feasible solution to both stability and lead toxicity is to find related compounds through reasonable desi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/12C30B7/10H01L31/08
CPCC30B7/10C30B29/12H01L31/08
Inventor 唐江李顺然牛广达尹力骁罗家俊孙娅雯
Owner HUAZHONG UNIV OF SCI & TECH
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