Low-temperature solution method synthesis process of novel long-afterglow perovskite crystal

A low-temperature solution method and synthesis process technology, applied in the field of materials science, can solve the problems such as hindering the application of long afterglow materials and the loss of morphology of precursors such as nanomaterials, and achieve the effect of clear crystal plane and high transparency.

Active Publication Date: 2021-06-04
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the high-temperature calcination process will introduce inevitable sintering aggregation, which will cause the precursors such as nanomaterials to lose their shape, and hinder the application of long-lasting materials in biological cells.
Therefore, it is a major challenge to develop a non-toxic long-lasting material system and its low-temperature synthesis process.

Method used

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  • Low-temperature solution method synthesis process of novel long-afterglow perovskite crystal
  • Low-temperature solution method synthesis process of novel long-afterglow perovskite crystal
  • Low-temperature solution method synthesis process of novel long-afterglow perovskite crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1) Put cesium chloride, silver chloride, indium chloride, manganese chloride, edetate disodium and concentrated hydrochloric acid into the polytetrafluoroethylene liner according to the chemical dosage ratio, and then put the polytetrafluoroethylene The liner is sealed in a stainless steel autoclave;

[0044] 2) Put the stainless steel autoclave into the muffle furnace, heat it to 180°C within 1h, and keep it for 12h, slowly cool the muffle furnace to 80°C within 24 hours, and finally cool it naturally to room temperature;

[0045]3) Open the reactor, discard the upper liquid, place the bottom crystal on absorbent paper, and rinse the single crystal with isopropanol for 3 to 5 times, then use filter paper to absorb the isopropanol on the surface to obtain perovskite long afterglow crystals .

[0046] The step 1) concentrated hydrochloric acid is hydrochloric acid with a concentration of 36-38%.

[0047] According to the stoichiometric dosage ratio Cs in the step 1) 2...

Embodiment 2

[0053] 1) Put cesium chloride, silver chloride, indium chloride, manganese chloride, edetate disodium and concentrated hydrochloric acid into the polytetrafluoroethylene liner according to the chemical dosage ratio, and then put the polytetrafluoroethylene The liner is sealed in a stainless steel autoclave;

[0054] 2) Put the stainless steel autoclave into the muffle furnace, heat it to 180°C within 1h, and keep it for 12h, slowly cool the muffle furnace to 80°C within 106h, and finally cool it naturally to room temperature;

[0055] 3) Open the reactor, discard the upper liquid, place the bottom crystal on absorbent paper, and rinse the single crystal with isopropanol for 3 to 5 times, then use filter paper to absorb the isopropanol on the surface to obtain perovskite long afterglow crystals .

[0056] The step 1) concentrated hydrochloric acid is hydrochloric acid with a concentration of 36-38%.

[0057] According to the stoichiometric dosage ratio Cs in the step 1) 2 Na...

Embodiment 3

[0063] 1) Put cesium chloride, silver chloride, indium chloride, manganese chloride, disodium edetate and concentrated hydrochloric acid into the polytetrafluoroethylene liner according to the stoichiometric ratio, and then put the polytetrafluoroethylene The liner is sealed in a stainless steel autoclave;

[0064] 2) Put the stainless steel autoclave into the muffle furnace, heat it to 180°C within 1h, and keep it for 12h, slowly cool the muffle furnace to 80°C within 48h, and finally cool it naturally to room temperature; (such as figure 1 shown);

[0065] 3) Open the reactor, discard the upper liquid, place the bottom crystal on absorbent paper, and rinse the single crystal with isopropanol for 3 to 5 times, then use filter paper to absorb the isopropanol on the surface to obtain perovskite long afterglow crystals .

[0066] The step 1) concentrated hydrochloric acid is hydrochloric acid with a concentration of 36-38%.

[0067] According to the stoichiometric dosage rati...

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Abstract

The invention discloses a novel long-afterglow perovskite crystal low-temperature solution method synthesis process, and the process comprises the following steps: 1) putting cesium chloride, silver chloride, indium chloride, manganese chloride, disodium ethylene diamine tetraacetate and concentrated hydrochloric acid into a polytetrafluoroethylene liner, and then sealing the polytetrafluoroethylene liner in a stainless steel high-pressure kettle; (2) putting the stainless steel high-pressure kettle into a muffle furnace, heating the stainless steel high-pressure kettle to 180 DEG C within 1 hour, keeping the temperature for 12 hours, slowly cooling the muffle furnace to 80 DEG C within 24-106 hours, and finally naturally cooling the muffle furnace to room temperature; 3) opening the reaction kettle, discarding the supernatant liquid, placing the bottom crystal on absorbent paper, flushing the single crystal for 3-5 times by using isopropanol, and then adsorbing the isopropanol on the surface by using filter paper to obtain the perovskite long afterglow crystal. According to the invention, a high-temperature calcination process confronted by a long-lasting long-afterglow material is avoided, the long-afterglow performance of a single crystal material is realized, and possibility is provided for application of the long-afterglow material in the fields of noctilucent gemstones and the like.

Description

technical field [0001] The invention relates to the technical field of material science, in particular to a low-temperature solution method synthesis process of a novel long-afterglow perovskite crystal. Background technique [0002] Long afterglow material is a light-storage luminescent material that can continue to emit light for hours or even weeks after the excitation source is removed. The long-lasting luminescent mechanism mainly involves the interaction of two active centers in the material, including the luminescent center and the trap center. The trap center can store light energy under the excitation of the excitation light source, and transfer the energy to the luminescent center under the action of thermal disturbance after the excitation stops, thus producing continuous luminescence. The depth of the center of the trap determines the length of the afterglow, and its density determines the brightness of the afterglow. Therefore, the controllable design of the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/62C01G45/00
CPCC09K11/628C01G45/006C01P2002/34C01P2006/60
Inventor 张玉海郑玮李秀玲
Owner UNIV OF JINAN
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