Silicon oxide single-coated cesium-copper-chlorine quantum dot, and preparation method and application thereof
A single cesium copper chloride, quantum dot technology, applied in the field of quantum dots, can solve the problems of quantum dot performance impact and other issues
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Embodiment 1
[0040]Preparation of SiO single-coated cesium copper chloride quantum dots (Cs 3 Cu 2 Cl 5 @SiO X )
[0041] (1) Preparation of cesium oleate precursor solution: 204mg Cs 2 CO 3 and 0.67mL of oleic acid were dissolved in 10mL of octadecene, and after nitrogen degassing for 20min, the temperature was raised to 120°C and kept for 30min to make Cs 2 CO 3 Complete reaction with oleic acid to obtain cesium oleate precursor;
[0042] (2) Preparation of cesium copper chloride quantum dots: add 39.6mg CuCl to 10mL octadecane, degas nitrogen for 20min, then raise the temperature to 120°C, then add 0.5mL oleylamine and 0.5mL oleic acid, and keep at 120°C for 5min Dissolve CuCl completely, then inject 3 mL of the cesium oleate precursor solution prepared in step (1), stir and react for 30 s and immediately put it into an ice bath for rapid cooling to obtain cesium copper chloride quantum dots;
[0043] (3) disperse the cesium copper chloride quantum dot prepared in step (2) in to...
Embodiment 2
[0045] Preparation of SiO single-coated cesium copper chloride quantum dots (Cs 3 Cu 2 Cl 5 @SiO X )
[0046] The difference from Example 1 is that in step (3), 80 μL of tetraethylsilane was added to obtain a reaction solution, and the molar ratio of cesium copper chloride quantum dots to tetraethylsilane in the reaction solution was 1:6.4.
Embodiment 3
[0057] Preparation of white light-emitting diodes (WLEDs) with silicon oxide single-clad cesium copper chloride quantum dots prepared in Example 2
[0058] 1) According to the mass ratio of 1:50, the commercial CaAlSiN 3 :Eu 2+ Mix the red phosphor with A / B glue (the mixing ratio of A / B glue is 1:4), stir for 15 minutes to get a dispersion, drop the dispersion onto a commercial UV chip, and dry it in vacuum at 90°C Cured in the box for 1 hour to obtain a cured chip;
[0059] 2) Dissolve polymethyl methacrylate in toluene at a mass volume ratio of 10:1, stir at 50°C for 2 hours to obtain a polymethyl methacrylate toluene solution, and wrap the silicon oxide prepared in Example 2 in a single Cesium-copper-chloride quantum dots are dispersed in polymethyl methacrylate toluene solution, then drop-coated on the cured chip described in step (1), and dried at 50°C for 15 minutes.
[0060] Figure 7 The electroluminescence and CIE results graphs of WLEDs at different voltages and ...
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