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Red green and blue three-basic-color fluorescent composite material and preparation method and application thereof

A composite material, three-primary color technology, applied in luminescent materials, chemical instruments and methods, sustainable buildings, etc., can solve problems such as luminous efficiency attenuation, and achieve stable state, good luminous efficiency, and easy application.

Active Publication Date: 2017-01-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure quantum dot materials are greatly affected by surface ligands, and their luminous efficiency decays severely in the solid state. In many practical applications such as white light LED applications, quantum dots still have high luminous efficiency in the solid state.

Method used

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  • Red green and blue three-basic-color fluorescent composite material and preparation method and application thereof
  • Red green and blue three-basic-color fluorescent composite material and preparation method and application thereof
  • Red green and blue three-basic-color fluorescent composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A preparation method of red, green and blue fluorescent composite material (green fluorescent composite material), which specifically includes the following steps:

[0043] (1) Weigh accurately 1.064g cesium bromide (CsBr) (0.005mol), add 5ml distilled water and stir to dissolve cesium bromide at room temperature to obtain cesium bromide solution; add 1.5g Y-type molecular sieve to the cesium bromide solution and stir at room temperature 36h (the stirring speed is 400r / min), centrifuge (the centrifugal speed is 3500r / min) for 5min, take the lower sample, wash twice with distilled water, and dry it at 80℃ for 30min, then calcinate at 300℃ for 30min, (calcined The system is to increase the temperature from room temperature to 300°C at a rate of 5°C / min, and keep the temperature at 300°C for 30 minutes), and then cool to room temperature with the furnace to obtain a Cs ion-exchanged Y-type molecular sieve;

[0044] (2) Combine octadecene (ODE) 5ml, oleic acid (OA) 1ml, oleylami...

Embodiment 2

[0050] A preparation method of red, green and blue fluorescent composite material (green fluorescent composite material), which specifically includes the following steps:

[0051] (1) Weigh accurately 1.064g cesium bromide (CsBr), add 5ml of distilled water and stir to dissolve cesium bromide at room temperature to obtain a cesium bromide solution; add 1.5g Y-type molecular sieve to the cesium bromide solution, and stir at room temperature for 36h (stirring speed 450r / min), centrifugation (speed of centrifugation is 3500r / min) for 5min, take the lower sample, wash twice with distilled water, and dry at 80℃ for 30min, then calcinate at 300℃ for 30min (calcination system is 5℃ / min The rate is increased from room temperature to 300°C, and the temperature is kept at 300°C for 30 minutes), and then cooled to room temperature with the furnace to obtain a Cs ion exchanged Y-type molecular sieve;

[0052] (2) Combine octadecene (ODE) 6.5ml, oleic acid (OA) 1.5ml, oleylamine (OAm) 1.5ml, le...

Embodiment 3

[0056] A preparation method of red, green and blue fluorescent composite material (green fluorescent composite material), which specifically includes the following steps:

[0057] (1) Weigh accurately 1.064g cesium bromide (CsBr), add 5ml of distilled water and stir to dissolve cesium bromide at room temperature to obtain a cesium bromide solution; add 1.5g Y-type molecular sieve to the cesium bromide solution, and stir at room temperature for 24h (stirring speed 400r / min), centrifugation (speed of centrifugation is 3500r / min) for 5min, take the lower sample, wash twice with distilled water, and dry at 80℃ for 30min, then calcinate at 300℃ for 30min (calcination system is 5℃ / min The rate is increased from room temperature to 300°C, and the temperature is kept at 300°C for 30 minutes), and then cooled to room temperature with the furnace to obtain a Cs ion exchanged Y-type molecular sieve;

[0058] (2) Combine octadecene (ODE) 10ml, oleic acid (OA) 2ml, oleylamine (OAm) 2ml, lead br...

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Abstract

The invention belongs to the field of luminescent materials, and discloses a red green and blue three-basic-color fluorescent composite material and a preparation method and application thereof. The method comprises the following steps: (1) adding a molecular sieve in a cesium halide solution, stirring, centrifuging, washing, drying, calcining, cooling and repeating the steps to obtain an ion exchanged molecular sieve; (2) taking octadecene, oleic acid, oleylamine and lead halide as raw materials, vacuumizing, heating and stirring to obtain a lead halide solution; and (3) adding the ion exchanged molecular sieve in the step (1) in the lead halide solution in the step (2), stirring and heating, cooling, centrifuging and washing, and drying to obtain the red green and blue three-basic-color fluorescent composite material. The prepared red green and blue three-basic-color fluorescent composite material is good in luminous efficiency and high in color purity, and has good emission peaks at 583 nm, 518 nm and 410 nm respectively; and quantum dots still have excellent optical property in a solid state. The composite material can be used in the field of white light LED and screening.

Description

Technical field [0001] The invention belongs to the field of luminescent materials, relates to a three-color fluorescent composite material, and particularly relates to (CsPbX 3 , X = Cl, Br, I) a red, green, and blue fluorescent composite material composed of quantum dots and molecular sieves and a preparation method thereof, the composite material is applied in the field of white light LED and the field of coating screen. Background technique [0002] Since the advent of GaAsP red light-emitting diodes (hereinafter referred to as LEDs), the research on LEDs has developed rapidly. As the fourth-generation lighting source, white LEDs are widely used in daily life, such as traffic signals, background lighting, and full-color displays, due to their high efficiency, energy saving, and no mercury pollution. At present, commercial white light LEDs obtain white light by combining a blue GaN die and YAG:Ce yellow phosphor. However, the LED obtained by this method lacks a red component,...

Claims

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Application Information

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IPC IPC(8): C09K11/66
CPCC09K11/66Y02B20/00
Inventor 叶柿黄谢意孙佳奕易雄张勤远
Owner SOUTH CHINA UNIV OF TECH
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