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Vapor pressure assisted preparation method of copper-based halide material and product and application thereof

A halide, copper-based technology, applied in the field of polycrystalline material preparation, can solve problems such as instability of white light, and achieve the effects of good air stability, long device service life and simple operation

Pending Publication Date: 2021-10-26
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to control the same ratio for different batches of products. With the attenuation of blue light chips or phosphors, the emitted white light becomes unstable.
This will have a huge adverse effect on some high colorimetric places
Currently, there are no commercially reliable materials that directly emit white light on the market

Method used

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  • Vapor pressure assisted preparation method of copper-based halide material and product and application thereof
  • Vapor pressure assisted preparation method of copper-based halide material and product and application thereof
  • Vapor pressure assisted preparation method of copper-based halide material and product and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare a white light polycrystalline material cesium copper iodine, the preparation process is as follows figure 1 As shown, the specific steps are as follows:

[0032] (1) Select 2.597g (10mmol) cesium iodide (CsI) and 1.904g (10mmol) cuprous iodide (CuI) and add it to 20mL hydroiodic acid (HI), place it on a heating table, add magnets, and turn on the magnetic force Stirrer, heated to 105 ° C, heated for more than 2 hours until cesium iodide (CsI) and cuprous iodide (CuI) were fully dissolved to form a solution;

[0033] (2) The solution fully dissolved in step (1) is filtered with a 0.45 μm polytetrafluoroethylene filter head, and the clear solution obtained is placed in a clean polytetrafluoroethylene-lined bottle and sealed in a reaction kettle. Then place the reaction kettle in a programmable cooling heating platform or an oven to perform a cooling reaction at a rate of 0.5°C / h, and the white light polycrystalline cesium copper iodine material can be obtained wh...

Embodiment 2

[0035] Preparation of a blue light single crystal material Cs 3 Cu 2 I 5 , the specific steps are as follows:

[0036] (1) Select 1.948g (7.5mmol) cesium iodide (CsI) and 0.952g (5mmol) cuprous iodide (CuI) and add it to 20mL hydroiodic acid (HCl), place it on a heating table, and add a magnet , turn on magnetic stirring, heat to 100° C., and heat for more than 2 hours until cesium iodide (CsI) and cuprous iodide (CuI) are completely dissolved to form a solution;

[0037] (2) Filter the solution fully dissolved in step (1) with a 0.45 μm polytetrafluoroethylene filter head, and place the clear solution obtained in a clean polytetrafluoroethylene-lined bottle and seal it in a reaction kettle. Then place the reaction kettle on a programmable cooling platform to cool down at a rate of 1°C / h, and then cool down to room temperature to obtain the blue light single crystal material Cs 3 Cu 2 I 5 .

Embodiment 3

[0039] Preparation of a yellow light single crystal material CsCu 2 I 3 , the specific steps are as follows:

[0040] (1) Select 1.298g (5mmol) cesium iodide (CsI) and 1.904g (10mmol) cuprous iodide (CuI) and add it to 20mL hydroiodic acid (HI), place it on the heating table, add magnets, and turn on the magnetic force Stirrer, heated to 130 ° C, heated for more than 2 hours until cesium iodide (CsI) and cuprous iodide (CuI) were completely dissolved to form a solution;

[0041] (2) Filter the solution fully dissolved in step (2) with a 0.45 μm polytetrafluoroethylene filter head, and place the obtained clear solution in a clean polytetrafluoroethylene-lined bottle, then place the polytetrafluoroethylene inner bottle The liner bottle is placed on a heat table with programmable cooling at a rate of 1°C / h for cooling reaction, and the yellow light single crystal material CsCu can be obtained when the temperature is lowered to room temperature. 2 I 3 .

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Abstract

The invention relates to a vapor pressure assisted preparation method of a copper-based halide material and a product and application thereof, which belong to the technical field of polycrystalline material preparation. The invention discloses a preparation method of a copper-based halide material, which comprises the following steps of mixing cesium halide, cuprous halide and halogen acid, and then carrying out cooling reaction at the rate of 0.1-5 DEG C / h. When the molar ratio of cesium to copper to halogen acid is 3: 2: 5, the generated compound emits blue light of 450 nm; when the molar ratio of cesium to copper to halogen acid is 1: 2: 3, the generated compound emits blue light of 580 nm; when the molar ratio of cesium, copper and haloid acid is between 3: 2: 5 and 1: 2: 3, the generated compound emits white light (a combination of blue and yellow light).

Description

technical field [0001] The invention belongs to the technical field of polycrystalline material preparation, and relates to a vapor pressure-assisted preparation method of a copper-based halide material and its product and application. Background technique [0002] As a widely used white light, it is actually a mixture of multiple monochromatic lights, such as: blue light + yellow light, or blue light + green light + red light, etc. Currently, the most common way on the market is to use blue light chips to excite yellow phosphors to emit white light. Different proportions of monochromatic light will affect its emission of cool white light or warm white light. However, it is difficult to control the same ratio for different batches of products. With the attenuation of blue light chips or phosphors, the emitted white light becomes unstable. This will have a huge adverse effect on some high colorimetric places. Currently, there are no commercially reliable materials that dir...

Claims

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Application Information

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IPC IPC(8): C30B28/04C30B29/12G01T1/202C09K11/61
CPCC30B28/04C30B29/12G01T1/2023C09K11/616Y02B20/00
Inventor 臧志刚汪百前
Owner CHONGQING UNIV
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