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CsPb<1-x>SnXBr3 quantum dot glass-ceramic material

A technology of glass-ceramics and glass materials, applied in glass furnace equipment, glass manufacturing equipment, manufacturing tools, etc., can solve the problems of high toxicity, etc., and achieve the effects of good material stability, simple preparation process, and easy-to-obtain raw materials

Inactive Publication Date: 2019-04-02
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Lead-based perovskites have excellent optical properties, but are highly toxic

Method used

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  • CsPb&lt;1-x&gt;SnXBr3 quantum dot glass-ceramic material
  • CsPb&lt;1-x&gt;SnXBr3 quantum dot glass-ceramic material
  • CsPb&lt;1-x&gt;SnXBr3 quantum dot glass-ceramic material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Accurately weigh the pure raw materials for each component in Table 1, put them into a platinum crucible, place them in a muffle furnace, raise the temperature to 1000°C, keep them warm for 10 minutes, pour them into a pre-set mold, anneal, and place them in a holding furnace Heat preservation, the heat preservation temperature is 400 ℃, heat preservation 5h. Obtained CsPb 0.9 sn 0.1 Br 3 A vitreous sample of quantum dots. The measured quantum efficiency was 52.6%.

Embodiment 2

[0033] Accurately weigh the pure raw materials for each component in Table 1, put them into a platinum crucible, place them in a muffle furnace, raise the temperature to 1000°C, keep them warm for 10 minutes, pour them into a pre-set mold, anneal, and place them in a holding furnace Heat preservation, the heat preservation temperature is 400 ℃, heat preservation 5h. Obtained CsPb 0.63 sn 0.37 Br 3 A vitreous sample of quantum dots. The measured quantum efficiency was 48.7%.

Embodiment 3

[0035] Accurately weigh the pure raw materials for each component in Table 1, put them into a platinum crucible, place them in a muffle furnace, raise the temperature to 1000°C, keep them warm for 30 minutes, pour them into a pre-set mold, anneal, and place them in a holding furnace Heat preservation, the heat preservation temperature is 400 ℃, heat preservation 5h. Obtained CsPb 0.5 sn 0.5 Br 3 A vitreous sample of quantum dots. The measured quantum efficiency is 37.1%.

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Abstract

The invention relates to a CsPb<1-x>SnXBr3 quantum dot glass-ceramic material, belonging to the field of quantum dot glass-ceramics. The CsPb<1-x>SnXBr3 quantum dot glass-ceramic material comprises the following components in molar percentages: 20 to 40% of P2O5, 10 to 20% of MgO, 10 to 20% of Cs2CO3, (1-x) to 40x% of PbBr220, x to 40x% of SnBr220 and 10 to 20% of NaBr. The CsPb<1-x>SnXBr3 quantumdot glass-ceramic material is prepared through the following steps: mixing the components, carrying out uniform grinding, carrying out heating to 1000 to 1050 DEG C, and carrying out heat-preservingfor 10 to 30 minutes; after heat-preserving is completed, rapidly pouring an obtained mixture into a mold, carrying out high-temperature annealing, carrying out heat-preserving at a glass transition temperature Tg for 2 to 10 hours, then carrying out cooling to a room temperature, and taking a glass material out of the mold. The CsPb<1-x>SnXBr3 quantum dot glass-ceramic material provided by the invention inherits excellent optical properties of a perovskite quantum dot; meanwhile, through introduction of an Sn element, the toxicity of lead-based perovskite is greatly reduced; and more importantly, the material provided by the invention has the advantages of good stability, simple preparation process, easily-available raw materials, low cost and stable physical and chemical properties, andcan be extensively applied to white-light LED devices.

Description

technical field [0001] The present invention relates to a kind of CsPb (1-x) sn X Br 3 A quantum dot glass-ceramic material belongs to the field of studying quantum dot glass-ceramics. Background technique [0002] LED is called a green light source. It has many characteristics such as energy saving, environmental protection, long life, and small size. It is widely used in various indications, displays, decorations, backlights, general lighting, and urban night scenes. At present, there are many kinds of luminescent materials used in LEDs. Recently, all-inorganic halide perovskite quantum dot materials have become a research hotspot in the field of optical materials due to their excellent luminescent properties such as narrow-band emission, high color purity, and adjustable emission spectrum. [0003] In 2014, Kovalenko et al first synthesized CsPbX by thermal injection 3 nanocrystals. They found that CsPbX 3 The luminous range covers the entire visible light range, an...

Claims

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Application Information

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IPC IPC(8): C03C10/16C03B5/16C03B25/02
CPCC03B5/16C03B25/02C03C10/16
Inventor 刘圣男向卫东梁晓娟
Owner WENZHOU UNIVERSITY