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Light emitting nanoparticles and process of making the same

A nanoparticle and luminophore technology, applied in luminescent materials, nanotechnology, nano-optics, etc., can solve problems such as narrow emission band and achieve the effect of improving photostability

Inactive Publication Date: 2018-06-08
DOW GLOBAL TECH LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As light emitters, quantum dots have many advantages, such as high emission intensity, wide absorption range, strong absorption capacity, and narrow emission band, however, there are still significant gaps in cost reduction, mass production, and compatibility with current LCD backlight assembly processes. challenge

Method used

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  • Light emitting nanoparticles and process of making the same
  • Light emitting nanoparticles and process of making the same
  • Light emitting nanoparticles and process of making the same

Examples

Experimental program
Comparison scheme
Effect test

example

[0082] Some embodiments of the present invention will now be described in the following examples, in which all parts and percentages are by weight unless otherwise indicated. The following materials are used in the examples:

[0083]

[0084]

[0085] *SCRC means Sinopharm Chemical Reagent Co.,Ltd.

[0086] The following standard analytical equipment and methods were used in the examples:

[0087] Characteristics of Nanoparticles

[0088] Dynamic light scattering (DLS, Malvern Zetasizer Nano) was used for particle size distribution analysis of nanoparticles.

[0089] Scanning transmission electron microscope (STEM, Nova TM NanoSEM 630) for particle morphology and size analysis of nanoparticles.

[0090] The absorption and emission spectra of nanoparticles were characterized by UV-VIS-NIR spectrophotometer (SHIMADZU UV3600) and fluorescence spectrophotometer (HORIBA FluoroMax-4), respectively.

[0091] Photostability Test

[0092] To simulate the actual situati...

example 2

[0108] 70ml of ethanol was added to a 250ml three-neck flask, followed by 5ml of ammonia. The mixture was stirred slowly while heating to 50°C. The calculated amount of functionalized LEC 1 dissolved in 30 ml ethanol was added to the reaction flask at 50 °C and stirred for 15-20 min. Then 3ml TEOS was added to the flask reactor. The resulting mixture was stirred at 50 °C for 3 h. 2 ml TEOS and 410 μl zirconium n-butoxide solution were dissolved in 18 ml IPA, then dropped into the reaction flask with a peristaltic pump within 180 min, and kept stirring overnight at 50 °C. 2.7ml MTMS was added to the reaction flask and kept stirring at 50°C for 4-5h. The obtained colloidal suspension was collected by centrifugation and washed three times with ethanol.

example 3

[0110] 70ml of ethanol was added to a 250ml three-neck flask, followed by 5ml of ammonia. The mixture was stirred slowly while heating to 50°C. The calculated amount of functionalized LEC 2 dissolved in 30 ml ethanol was added to the reaction flask at 50 °C and stirred for 15-20 min. Then 3ml TEOS was added to the flask reactor. The resulting mixture was stirred at 50 °C for 3 h. 2ml TEOS and 305μl TBOT were dissolved in 18ml IPA, then dropped into the reaction flask with a peristaltic pump within 180min, and stirred overnight at 50°C. 2.7ml methyltriethoxysilane was added to the reaction flask and kept stirring at 50°C for 4-5h. The obtained colloidal suspension was collected by centrifugation and washed three times with ethanol.

[0111] Compare (Comp) instance A

[0112] 70ml of ethanol was added to a 250ml three-neck flask, followed by 5ml of ammonia. The mixture was stirred while heating to 50°C. The calculated amount of functionalized LEC 1 dissolved in 30 ml et...

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Abstract

Nanoparticles have a core covalently bonded with a luminophore and a hybrid shell at least partially encapsulating the core. The nanoparticles provide improved photostability, thermal stability and emission properties than light emitting materials that the luminophore derives from.

Description

technical field [0001] The present invention relates to luminescent nanoparticles and methods for their manufacture. Background technique [0002] After half a century of extensive materials research and device development, thin film transistor liquid crystal displays (TFT-LCDs) have become the dominant flat panel display technology. While many key issues such as viewing angle, contrast ratio and power consumption have been resolved to acceptable levels, liquid crystal displays (LCDs) still have room for improvement in terms of color gamut. Recently, LCDs based on quantum dots (QDs) are emerging as new backlight sources. As light emitters, quantum dots have many advantages, such as high emission intensity, wide absorption range, strong absorption capacity, and narrow emission band, however, there are still significant gaps in cost reduction, mass production, and compatibility with current LCD backlight assembly processes. challenge. In addition, QDs are sensitive to oxyge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C09K11/07H01L51/54
CPCC09K11/06C09K2211/1029C09K11/02C09K11/07B82Y20/00B82Y40/00H10K85/40H10K50/30H10K50/80H10K85/321B82Y10/00C09K2211/186
Inventor 王秀艳吕博李扬扈楠任小凡P·特雷弗纳斯三世饶袁桥
Owner DOW GLOBAL TECH LLC
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