Static preparation method of manganese-doped lead-cesium halide fluorescent glass thin film

A technology of fluorescent glass and lead halide, applied in the field of LED fluorescence, to achieve the effects of improved stability, high fluorescent height, and adjustable luminescence

Inactive Publication Date: 2018-07-06
WENZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, with Mn-doped CsPbX 3 There is no report on the LED device prepared by the perovskite composition, so it is very important to establish a method for the electrostatic preparation of manganese-doped lead cesium halide fluorescent glass film

Method used

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  • Static preparation method of manganese-doped lead-cesium halide fluorescent glass thin film
  • Static preparation method of manganese-doped lead-cesium halide fluorescent glass thin film
  • Static preparation method of manganese-doped lead-cesium halide fluorescent glass thin film

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preparation example Construction

[0024] Please refer to the specific preparation steps of the present invention figure 1 .

[0025] In the last step of the present invention, the difference between doping manganese and not doping manganese is relatively large, and specific reference can be made to figure 2 and image 3 , as can be seen from this spectrum, the difference between manganese doping and no manganese doping in the final step is very clear.

[0026] We synthesized manganese-doped lead cesium halide quantum dots (Mn-dopedCsPbCl 3 、Mn-doped CsPb(Cl / Br) 3 ) show bright orange-red and blue-purple fluorescence respectively, please refer to Figure 4 and Figure 5 .

Embodiment 1

[0028] Weigh CsCO 3 0.405g, OA 1.75ml and ODE 17ml in a 25ml three-neck flask, under N 2 Cs oleate was prepared under the conditions, and then a certain proportion of PbCl 2 , MnCl 2 ·(H 2 O) 4 and 5ml ODE were placed in a 25ml three-necked flask, and dried at 120°C for 1h under vacuum, anhydrous oleic acid and oleylamine were 2 Inject under protection, when the completely melted manganese-doped lead halide salt is formed, the temperature rises to 140°C-200°C, the Cs oleate solution is quickly injected, and the bright orange-red Mn-doped CsPbCl can be obtained after 1 min in ice-water bath 3 quantum dots. Finally, the quantum dots are evenly dispersed in the ink, and then encapsulated between two pieces of glass to prepare a manganese-doped lead cesium chloride fluorescent glass film.

Embodiment 2

[0030] Weigh CsCO 3 0.405g, OA 1.75ml and ODE 17ml in a 25ml three-neck flask, under N 2 Cs oleate was prepared under the conditions, and then a certain proportion of PbBr 2 , MnCl 2 ·(H 2 O) 4 and 5ml ODE were placed in a 25ml three-necked flask, and dried at 120°C for 1h under vacuum, anhydrous oleic acid and oleylamine were 2 Inject under protection, when the completely melted manganese-doped lead halide salt is formed, the temperature rises to 140°C-200°C, the Cs oleate solution is quickly injected, and after 10s in an ice-water bath, bright blue-purple Mn-doped CsPb can be obtained ( Cl / Br) 3quantum dots. Finally, the quantum dots are evenly dispersed in the ink, and then encapsulated between two pieces of glass to prepare a lead-cesium fluorescent glass film of manganese-doped chlorine, bromine, lead, and cesium.

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Abstract

The invention discloses a static preparation method of a manganese-doped lead-cesium halide fluorescent glass thin film. The static preparation method comprises the following steps of firstly, dissolving cesium carbonate and oleic acid in 1-octadecene, and obtaining a cesium oleate solution under a nitrogen protection condition; secondly, rapidly injecting the cesium oleate solution into a manganese-doped lead halide salt solution which is completely dissolved and has a temperature range of 140-200 DEG C to obtain a product, namely Mn-doped CsPbX3 quantum dot, and performing centrifugal purification, wherein the quantum dot can be dissolved in n-hexane and methylbenzene; and finally, coating the prepared Mn-doped CsPbX3 quantum dot combined with ink onto a surface of glass to form a layerof thin film with uniform thickness, wherein the thin film is clamped between two pieces of glass, the thin film is hermetically isolated with an external environment by vacuumizing and bubble discharging, and the manganese-doped lead-cesium halide quantum-dot fluorescent glass thin film is obtained. The static preparation method has the advantages that the fluorescent glass thin film is excellentin stability and durability.

Description

technical field [0001] The invention belongs to the technical field of LED fluorescence, and specifically refers to an electrostatic preparation method of manganese-doped lead-cesium halide fluorescent glass film. Background technique [0002] In recent years, methylamine lead iodide (MAPbI 3 ) represented by organic-inorganic hybrid perovskite materials have attracted extensive attention due to their excellent optoelectronic properties. In just a few years, the photoelectric conversion efficiency of perovskite solar cells has exceeded 22.1%, showing a good application prospect. However, the instability of organic-inorganic hybrid perovskite materials such as lead iodide methylamine to humidity, heat, and light limits their further applications. Compared with organic-inorganic hybrid perovskites, all-inorganic cesium lead halide perovskites (CsPbX 3 ) has superior stability, so it presents a very attractive application prospect in optoelectronic fields such as perovskite ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/50
CPCH01L33/50H01L2933/0041
Inventor 向卫东何美玲梁晓娟
Owner WENZHOU UNIVERSITY
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