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Preparation and application of full-inorganic perovskite quantum dot/mesoporous MOF-5 composite luminescent material in LED (Light-emitting Diode)

A technology of MOF-5 and luminescent materials, applied in luminescent materials, electrical components, circuits, etc., can solve the problems of poor stability of perovskite quantum dots, achieve excellent optical properties, mild reaction conditions, and simple raw materials

Inactive Publication Date: 2018-11-09
LANZHOU UNIVERSITY
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  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to provide a preparation method of all-inorganic perovskite quantum dots / mesoporous MOF-5 composite luminescent material, use mesoporous MOF-5 to stabilize perovskite quantum dots, and solve the problem of stable perovskite quantum dots sex problem

Method used

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  • Preparation and application of full-inorganic perovskite quantum dot/mesoporous MOF-5 composite luminescent material in LED (Light-emitting Diode)
  • Preparation and application of full-inorganic perovskite quantum dot/mesoporous MOF-5 composite luminescent material in LED (Light-emitting Diode)
  • Preparation and application of full-inorganic perovskite quantum dot/mesoporous MOF-5 composite luminescent material in LED (Light-emitting Diode)

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Weigh 1.1899g (4mmol) Zn (NO 3 ) 2 ·6H 2 O, 0.3323 g (2 mmol) terephthalic acid (PTA), 0.4374 g (1.2 mmol) cetyltrimethylammonium bromide (CTAB), and 331.2 μL (2.4 mmol) 1,3,5-trimethylammonium Benzene (TMB), add 50ml N,N-dimethylformamide (DMF) solution under stirring; place in 100ml Teflon autoclave lining, heat at 135°C for 24 hours; after cooling, the resulting powder Filter off and wash with DMF to remove templating agents (CTAB and TMB). Then wash with chloroform solution to remove residual DMF; vacuum dry the product at 80°C for 2 hours to obtain mesoporous MOF-5 crystals. 0.391g Cs 2 CO 3 , 18.73mL of octadecene (ODE) and 1.27mL of oleic acid (OA) were placed in a 100mL three-necked flask, and degassed at a temperature of 130°C under nitrogen gas until Cs 2 CO 3 The powder was completely dissolved, and then the temperature was raised to 160° C. for 0.5 hour to obtain a cesium oleate solution. 24mL ODE, 1mL OA, 3mL OAm and 0.4mmol PbBr 2 Place in a 100mL...

Embodiment 2

[0048] Weigh 1.1899g (4mmol) Zn (NO 3 ) 2 ·6H 2 O, 0.3323 g (2 mmol) terephthalic acid (PTA), 0.4374 g (1.2 mmol) cetyltrimethylammonium bromide (CTAB), and 331.2 μL (2.4 mmol) 1,3,5-trimethylammonium Benzene (TMB), add 50ml N,N-dimethylformamide (DMF) solution under stirring; place in 100ml Teflon autoclave lining, heat at 135°C for 24 hours; after cooling, the resulting powder Filter off and wash with DMF to remove templating agents (CTAB and TMB). Then wash with chloroform solution to remove residual DMF; vacuum dry the product at 80°C for 2 hours to obtain mesoporous MOF-5 crystals. 0.391g Cs 2 CO 3 , 18.73mL of octadecene (ODE) and 1.27mL of oleic acid (OA) were placed in a 100mL three-necked flask, and degassed at a temperature of 130°C under nitrogen gas until Cs 2 CO 3 The powder was completely dissolved, and then the temperature was raised to 160° C. for 0.5 hour to obtain a cesium oleate solution. 24mL ODE, 1mL OA, 3mL OAm and 0.08mmol PbBr 2 , 0.32 mmol PbI...

Embodiment 3

[0060] According to the molar ratio of 1:0.2:0.1:0.1, respectively weigh zinc nitrate hexahydrate, terephthalic acid, cetyltrimethylammonium bromide and 1,3,5-trimethylbenzene, and take Zinc nitrate hexahydrate, terephthalic acid, cetyltrimethylammonium bromide and 1,3,5-trimethylbenzene were added to N,N-dimethylformamide and heated in a hydrothermal kettle to React at 100°C for 24 hours; naturally cool to room temperature, purify the product by suction filtration, wash off the template, and then wash with chloroform solution to remove residual N,N-dimethylformamide, at a temperature of 50°C Vacuum-dried for 4 hours to obtain mesoporous MOF-5 crystals; according to the ratio of adding 1 mmol cesium carbonate and 0.635 mL oleic acid to 10 mL octadecene, octadecene, cesium carbonate and oleic acid were placed in a three-necked flask, at temperature Under the conditions of 50°C and nitrogen gas, degas until the cesium carbonate is completely dissolved; then, raise the temperatur...

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Abstract

The invention relates to preparation and application of a full-inorganic perovskite quantum dot / mesoporous MOF-5 composite luminescent material in an LED (Light-emitting Diode). The full-inorganic perovskite quantum dot / mesoporous MOF-5 composite luminescent material is prepared through the steps of adding zinc nitrate hexahydrate, terephthalic acid, CTAB (Cetyltrimethyl Ammonium Bromide) and TMB(Tetramethylbenzidine) into DMF (Dimethyl Formamide), reacting, vacuum drying a resultant, and obtaining a mesoporous MOF-5 crystal; dissolving cesium carbonate into octadecene and oleic acid, and obtaining a cesium oleic acid solution; dissolving lead halide into octadecene, oleic acid and oleylamine, and obtaining a reaction solution; injecting the cesium oleic acid solution, quickly cooling, centrifuging, obtaining a perovskite quantum dot, dissolving in normal hexane, and obtaining a perovskite quantum dot normal hexane solution; vacuum drying the mesoporous MOF-5 crystal, and adding the perovskite quantum dot normal hexane solution; filtering, precipitating, vacuum drying, and obtaining the full-inorganic perovskite quantum dot / mesoporous MOF-5 composite luminescent material. The composite luminescent material is mixed with an ultraviolet curing adhesive so as to drip and be coated on a blue-light LED chip, and ultraviolet curing is carried out. According to the preparation method, the stability and the ion exchange resistance of the perovskite quantum dot are improved.

Description

technical field [0001] The invention belongs to the technical field of semiconductor quantum dot luminescent materials, and relates to a preparation method of an all-inorganic perovskite quantum dot / mesoporous MOF-5 composite luminescent material; the invention also relates to the application of the composite luminescent material in LEDs. Background technique [0002] All-inorganic perovskite quantum dots CsPbX 3 (X=Cl,Br,I) has bright photoluminescence, ultra-high quantum yield, tunable emission wavelength, narrow emission spectrum and wide color gamut, and has become a potential material in optoelectronic device applications. However, the main disadvantage of perovskite QDs is their poor chemical stability under ambient conditions. Due to their low formation energy, perovskite QDs are very sensitive to humidity, irradiation, and temperature. In addition, the highly ionized internal bonds make them highly susceptible to ion exchange reactions. How to solve the stability ...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/66H01L33/50
CPCC09K11/025C09K11/665H01L33/504H01L2933/0041
Inventor 王育华任杰鋆周晓鹏董璇
Owner LANZHOU UNIVERSITY
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