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Up-conversion white light solid material and application thereof in producing white light

A solid material, white light technology, used in luminescent materials, sustainable buildings, climate sustainability, etc., can solve the problems of high photon quantum yield, low excitation energy, short life, etc., to reduce the amount of blue light radiation, low blue light radiation , the effect of low excitation power

Active Publication Date: 2019-01-04
SUZHOU UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Intensive excitation requires an expensive high-power pump light source, which largely limits the practical application of rare earths
In comparison, triplet annihilation-based up-conversion (TTA-UC) requires lower excitation energy and high photon quantum yield, and different energy donors / acceptors can be selected to obtain up-conversion luminescence of different frequencies, thus triggering However, the existing liquid up-conversion system has a short life span of only ten minutes, so it cannot be practically applied, and the solid-state up-conversion system has the problem of low luminous efficiency.

Method used

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  • Up-conversion white light solid material and application thereof in producing white light
  • Up-conversion white light solid material and application thereof in producing white light
  • Up-conversion white light solid material and application thereof in producing white light

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The photosensitizer used in the up-conversion solution in this example is palladium octaethylporphyrin (PdOEP), and the luminescent agent is 9,10-diphenylanthracene (DPA). The structures of the two are as follows:

[0038]

[0039] Preparation of upconverting microemulsion: In a nitrogen atmosphere, add Tween-20 to deionized water and stir evenly; then add toluene solution containing luminescent agent and photosensitizer, stir until completely clear to obtain weak light frequency upconverting microemulsion Emulsion system, at this time, irradiated with green light to obtain diffuse white light, the intensity is only 26cad, and it disappears in three seconds; the mass ratio of the toluene solution containing the luminescent agent and the photosensitizer, deionized water, and Tween-20 is 1: 10:5, the molar concentration ratio of photosensitizer (PdOEP) to luminescent agent (DPA) is 200:1, and the concentration of luminescent agent is 1.5×10 -2 mol / L.

[0040]Take 1 g ...

Embodiment 2

[0044] The photosensitizer used in the up-conversion solution in this example is palladium octaethylporphyrin (PtOEP), and the luminescent agent is 9,10-diphenylanthracene (DPA). The structures of the two are as follows:

[0045]

[0046] The preparation method of the low-light frequency up-conversion microemulsion system in this example is the same as that in Example 1, except that the photosensitizer is replaced by PtOEP.

[0047] Take 1g of low-light frequency up-conversion microemulsion system, add 2g of methacrylic acid, and then add 0.01g of benzoyl peroxide, stir evenly, and carry out polymerization reaction at 80°C to obtain a solid up-conversion material, which is an up-conversion white light solid Material.

[0048] Use 532nm green light to excite (37.12mW) solid-state up-conversion material. When the temperature is 25°C, when the temperature is 30°C, the combination of three colors of light produces cool white light. The CIE coordinates of the white light point a...

Embodiment 3

[0050] The photosensitizer used in the up-conversion solution in this example is palladium octaethylporphyrin (PdOEP), and the luminescent agent is 9,10-diphenylanthracene (DPA). The structures of the two are as follows:

[0051]

[0052] The preparation method of the low-light frequency up-converting microemulsion system in this example is the same as Example 1, only the luminescent agent is replaced with An.

[0053] Take 1g of low-light frequency upconversion microemulsion system, add 4g of acrylamide, and then add 0.01g of benzoyl peroxide, stir evenly, carry out polymerization reaction at 80°C, and obtain solid upconversion material.

[0054] The solid-state up-conversion material is excited by 532nm green light (37.12mW). When the temperature is 20°C, the light combination of the three colors presents a partial white light. The CIE coordinates of the white light point are (0.352, 0.371), of which the red light radiation accounts for 74 %, green light radiation account...

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Abstract

The invention belongs to the technical field of application of photoluminescent materials, and particularly discloses an up-conversion white light solid material and application thereof in producing white light. The white light is obtained by the following steps: uniformly dispersing temperature-responsive up-conversion microemulsion in a solid material, fixing the laser (green light, 532 nm) intensity, and controlling the temperature, so that light emitted from an up-conversion system is combined with a light source to obtain the white light. The focus of the invention is that the material has the advantages of low blue light radiation, high luminescence efficiency, easy instrumentation and the like, can precisely obtain the white light for emission by temperature driving in comparison with a traditional white light up-conversion luminescence material, and has low excitation power; and then secondly, compared with a mainstream white light source LED (excited by blue light), the material is excited by green light (532 nm) to greatly reduce blue light radiation; and the material can be applied to many scientific and technical fields such as daily lighting, microscopic imaging, laseroptical fiber lighting and optical fiber communication indicator lights.

Description

technical field [0001] The invention belongs to the technical field of application of photoluminescent materials, in particular to a white light hydrogel, in particular to an up-conversion white light solid material and its application in white light generation. Background technique [0002] White light is a kind of multi-color mixed light. Generally, white light needs to be realized through the combination of multi-color light. According to the principle of luminescence and color matching, there are mainly two methods to form it. The first is to use blue light technology and phosphor to form white light. The second The first is that a variety of monochromatic lights are mixed and compounded to form white light. The second method often requires various monochromatic luminescent materials. Among them, the existing up-conversion white light-emitting materials are all luminescent materials based on rare earth material systems, but the existing known blue and red up-conversion l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/06C08F120/56C08F2/48C08F2/44C08K5/01C09K11/06
CPCC08F2/44C08F2/48C08F120/06C08F120/56C08K5/01C09K11/06Y02B20/00
Inventor 叶常青郑道远陈硕然柳春雨王筱梅
Owner SUZHOU UNIV OF SCI & TECH
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