High-color-rendering quantum dot fluorescent powder film and preparation method thereof

A quantum dot and phosphor technology, which is applied in the field of high color rendering quantum dot phosphor film and its preparation, can solve the problems of low efficiency of red phosphor, complex chip drive circuit, and development constraints of high CRI LED, and achieve high The effect of color rendering

Active Publication Date: 2017-11-24
河北欧莱德光电材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to improve the color rendering performance of white LEDs, there are generally the following schemes to improve the LED spectrum to improve the color rendering index: one is to add red phosphor to the LED and mix it with yellow phosphor, but because of the efficiency of red phosphor Low, which restricts the development of high-resolution LED; second, use ultraviolet LED to excite three primary color phosphors, but ultraviolet damages the packaging material greatly, which affects the service life; third is to use four-color LED (red, green, blue , white or yellow) to perfectly integrate the LED spectrum to improve color rendering, but the drive circuit of the four-color LED chip is more complicated, and the degree of light attenuation between the chips is inconsistent, resulting in color deviation

Method used

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  • High-color-rendering quantum dot fluorescent powder film and preparation method thereof
  • High-color-rendering quantum dot fluorescent powder film and preparation method thereof
  • High-color-rendering quantum dot fluorescent powder film and preparation method thereof

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Embodiment 1

[0044] A method for preparing a high color rendering quantum dot phosphor film, the process steps are as follows:

[0045] a. Weigh a certain amount of CdSe / CdS / ZnS red light quantum dots with a peak emission wavelength of 626nm, and a certain amount of CdSe@ZnS / ZnS blue-green quantum dots with a peak emission wavelength of 493nm (red and blue-green quantum dots are provided by the company Quantum According to the mass ratio of red light quantum dots and organic solvent is 1:17, and the mass ratio of blue-green light quantum dots and organic solvent is 1:2, add appropriate amount to red light quantum dots and blue-green light quantum dots respectively organic solvent PhMe (toluene);

[0046] b. Put the red light quantum dot solution and the blue-green light quantum dot solution obtained in step a into an ultrasonic cleaner for ultrasonic treatment, control the water bath temperature of the ultrasonic cleaner to 35°C, ultrasonic frequency 70 KHZ, and ultrasonic treatment time 3...

Embodiment 2

[0051] The gist of the present invention is to provide a kind of preparation method of high color rendering property quantum dot phosphor film, described process step is as follows:

[0052] a. Weigh a certain amount of CdSe / CdS / ZnS red light quantum dots with a peak emission wavelength of 626nm, and a certain amount of CdSe@ZnS / ZnS blue-green quantum dots with a peak emission wavelength of 493nm (red and blue-green quantum dots are provided by the company Quantum According to the mass ratio of red light quantum dots and organic solvent is 1:17, and the mass ratio of blue-green light quantum dots and organic solvent is 1:2, add appropriate amount to red light quantum dots and blue-green light quantum dots respectively organic solvent PhMe (toluene);

[0053] b. Put the red light quantum dot solution and the blue-green light quantum dot solution obtained in step a into an ultrasonic cleaner for ultrasonic treatment, control the water bath temperature of the ultrasonic cleaner t...

Embodiment 3

[0058] A method for preparing a high color rendering quantum dot phosphor film, the process steps are as follows:

[0059] a. Weigh a certain amount of CdSe / CdS / ZnS red light quantum dots with a peak emission wavelength of 626nm, and a certain amount of CdSe@ZnS / ZnS blue-green quantum dots with a peak emission wavelength of 493nm (red and blue-green quantum dots are provided by the company Quantum According to the mass ratio of red light quantum dots and organic solvent is 1:17, and the mass ratio of blue-green light quantum dots and organic solvent is 1:2, add appropriate amount to red light quantum dots and blue-green light quantum dots respectively organic solvent PhMe (toluene);

[0060] b. Put the red light quantum dot solution and the blue-green light quantum dot solution obtained in step a into an ultrasonic cleaner for ultrasonic treatment, control the water bath temperature of the ultrasonic cleaner to 35°C, ultrasonic frequency 70KHZ, and ultrasonic treatment time 30...

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Abstract

The invention relates to a preparation method of a high-color-rendering quantum dot fluorescent powder film. The preparation method comprises the following steps: taking a PET film as a base material; coating composite gel comprising red and blue green single-color quantum dots and yellow rare-earth fluorescent powder; preparing composite gel; coating a film; covering and pressing the film; curing and forming the film to obtain the quantum dot fluorescent powder film. According to the preparation method provided by the invention, optical parameters of spectrum of each component and the proportion of the components are optimized, so that the obtained quantum dot fluorescent powder film has a relatively high color retendering property, has a color rendering index which can be 95 or more, has color temperature within an ideal sunlight range, and is suitable for the full-spectrum LED (light emitting diode) lighting field.

Description

technical field [0001] The invention belongs to the field of thin film preparation, and in particular relates to a high color rendering quantum dot fluorescent powder thin film and a preparation method thereof. Background technique [0002] LED is a new type of solid-state light source. Full-spectrum LEDs with high color rendering have broad application prospects in lighting places that require high light quality, color gamut saturation, and resolution, such as plant lighting, surgical lights, museums, textile mills, eye protection lights, and table lamps. Become a new hot spot in the field of lighting engineering. [0003] In order to improve the color rendering performance of white LEDs, there are generally the following schemes to improve the LED spectrum to improve the color rendering index: one is to add red phosphor to the LED and mix it with yellow phosphor, but because of the efficiency of red phosphor Low, which restricts the development of high-resolution LED; se...

Claims

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Application Information

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IPC IPC(8): B32B37/12B32B27/36B32B27/06B32B33/00B32B37/10C09K11/02C09K11/88
CPCB32B27/06B32B27/36B32B33/00B32B37/10B32B37/12B32B2307/4026C09K11/02C09K11/883
Inventor 孙鹏梁非非郭海清
Owner 河北欧莱德光电材料科技有限公司
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