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Perovskite-like material CsPb2Br5, as well as synthetic method and application thereof

A technology of perovskite material and synthesis method, applied in the field of nanomaterials, can solve the problems of harsh conditions, complex process, unfavorable recycling of organic waste liquid, etc., achieve cost saving, avoid toxic and harmful solvents, and be suitable for large-scale mass production. Effect

Inactive Publication Date: 2017-12-01
HUBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The current inorganic perovskite CsPbX 3 (X=Cl, Br, I) is mostly synthesized at high temperature in octadecene or paraffin wax system, and the morphology is mostly controlled by ligands. The process is complicated and the conditions are harsh.
Even though the novel room temperature perovskite CsPbX 3 (X=Cl, Br, I) Synthesis cannot avoid the use of toxic and harmful solvents, which are not good for the human body, the environment and the recycling of organic waste liquid

Method used

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  • Perovskite-like material CsPb2Br5, as well as synthetic method and application thereof
  • Perovskite-like material CsPb2Br5, as well as synthetic method and application thereof
  • Perovskite-like material CsPb2Br5, as well as synthetic method and application thereof

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preparation example Construction

[0028] A kind of perovskite material CsPb 2 Br 5 The synthetic method specifically comprises the following steps;

[0029] Step 1, dissolving the cesium source in a solvent, stirring and dissolving to form a clear solution;

[0030] Step two, the PbBr 2 Mix with a clear solution and react at room temperature, cesium, lead, and bromide ions undergo ion exchange to form CsPb 2 Br 5 Perovskite-like precipitation.

[0031] The method utilizes hydrolysis and chemical reaction to separate and ion-exchange cesium, lead, and bromide ions, because the product CsPb 2 Br 5 Insoluble in solvents and precipitated out. The obtained perovskite-like material CsPb 2 Br 5 Spectral emission in the ultraviolet region can be achieved. The used solvent is green and environmentally friendly, harmless to human body and environment, saves cost, the reaction temperature can be carried out at room temperature, the operation is simple and easy, and it is suitable for large-scale batch productio...

Embodiment 1

[0045] 1. Add 1mmol of CsAc into the reaction flask, then use 2ml of deionized water as solvent, stir to dissolve to form a clear solution, then add 2.5mmol of PbBr 2 Add to reaction flask.

[0046] 2. After a period of reaction, cesium, lead, and bromide ions are separated and ion exchanged, and the resulting product is precipitated by chemical co-precipitation.

[0047] 3. The formed precipitate is transferred and purified by washing with HBr to obtain the perovskite-like material CsPb 2 Br 5 .

[0048] 4. The above-mentioned perovskite-like material CsPb 2 Br 5 Product morphology SEM picture as figure 2 shown.

Embodiment 2

[0050] 1. Add 1mmol of CsAc into the reaction flask, then use 2ml of deionized water and absolute ethanol as solvents, the volume ratio of ionized water and absolute ethanol is 1:3, stir to dissolve to form a clear solution.

[0051] 2. Add 2.5mmol of PbBr 2 Add it into the reaction bottle, and after a period of reaction, the cesium, lead, and bromide ions are separated and ion exchanged, and the resulting product is precipitated by chemical co-precipitation.

[0052] 3. The formed precipitate is transferred and purified by washing with HBr to obtain the perovskite-like material CsPb 2 Br 5 .

[0053] 4. The above-mentioned perovskite-like material CsPb 2 Br 5 Product morphology SEM picture as image 3 shown.

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Abstract

The invention provides a synthetic method of a perovskite-like material CsPb2Br5. The synthetic method comprises steps as follows: step one, a Cs source is dissolved in a solvent, stirred and dissolved, and a clear solution is formed; step two, PbBr2 is mixed with the clear solution, a mixed solution is subjected to a reaction at room temperature, Cs, Pb and Br ions are subjected to ion exchange, and CsPb2Br5 precipitates are formed. According to the method, Cs, Pb and Br in an ionic form are dissolved in the solvent, the solvent is prepared from water and alcohol in a proper ratio through mixing, and morphology of a product can be controlled by controlling the ratio of water to alcohol. Ultraviolet spectrum emission of CsPb2Br5 can be realized, and the application prospect is broad. The invention further provides the perovskite-like material CsPb2Br5 and an application thereof.

Description

technical field [0001] The present invention relates to the technical field of nanomaterials such as photoelectric display lighting, biomedicine, and photoelectric detection, and in particular to a perovskite-like material CsPb 2 Br 5 , the perovskite-like material CsPb 2 Br 5 Synthetic methods, and uses thereof. Background technique [0002] In recent years, the application of inorganic perovskite materials in the field of optoelectronics has attracted much attention, especially in the fields of light-emitting diodes (LEDs) and photodetectors (PDs), which have developed rapidly (Yantara N, Bhaumik S, Yan F, et al. The journal of physical chemistry letters, 2015, 6(21): 4360-4364; Xue J, Gu Y, Shan Q, et al. Angewandte Chemie International Edition, 2017, 56(19): 5232 - 5236.). [0003] The current inorganic perovskite CsPbX 3 The preparation methods of (X=Cl, Br, I) are mostly synthesized at high temperature in octadecene or paraffin wax system, and the morphology is mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/00B82Y30/00B82Y40/00A61L2/23A61L2/10
CPCC01G21/006A61L2/10A61L2/23B82Y30/00B82Y40/00C01P2004/03C01P2004/61
Inventor 王多发章天金李靖张慧婕汪文康
Owner HUBEI UNIV
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