Method for measuring content of quantum dot surface ligand and quantum dot ink preparing method
A technology of surface ligands and measurement methods, applied in the analysis of materials, instruments, etc., can solve problems such as low pixel resolution, uneven panel quality, difficult dissolution of quantum dots, etc., to achieve reliable quality assurance, strong operability, and applicable wide-ranging effect
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Embodiment 1
[0046] Determine the relative content of the characteristic element S in the surface ligand of the standard particle CdZnSe / CdZnSe / ZnSe quantum dots (the surface ligand is octylthiol) as ω 1 . Take standard particles, stick conductive adhesive or double-sided adhesive paper on the sample holder, sprinkle the standard particles evenly on the sample holder, coat a layer of Pt conductive film, the coating time is 2 min, and then place the standard particles on the sample holder. Observed in a scanning electron microscope. Set the magnification to 500 times, select the standard particle concentration area for analysis, and the size of the analysis area is 5*5um 2, in the energy spectrum analyzer, the content data of each element contained in the standard particles in the selected analysis area is collected to obtain the content curve of each element, and the Cd, Zn, Se and S elements in the element content curve are calibrated respectively, The relative content of each element w...
Embodiment 2
[0049] 1. Determine the relative content of the characteristic element P in the surface ligand of the standard particle CdZnSe / ZnS quantum dot (the surface ligand is octadecylphosphoric acid) as ω 1 .
[0050] Take standard particles, stick conductive adhesive or double-sided adhesive paper on the sample holder, sprinkle the standard particles evenly on the sample holder, coat a layer of Au conductive film, the coating time is 5 minutes, and then place the standard particles on the sample holder. Observe in the scanning electron microscope, set the magnification to 1000 times, analyze the standard particle concentration area, the size of the analysis area is 8*8um 2 , use the energy spectrum analyzer to collect the content data of each element contained in the standard particles in the selected analysis area, and obtain the content curve of each element, and perform Cd, Zn, Se, S and P elements in the element content curve respectively For calibration, the content of P elemen...
Embodiment 3
[0055] 1. Determine the relative content of the characteristic element N in the surface ligand of the standard particle CdS / CdZnS / CdZnS / ZnS quantum dots (the surface ligand is oleylamine) as ω 1 .
[0056] Take the standard particles, stick the conductive adhesive or double-sided adhesive paper on the sample holder, sprinkle the standard particles evenly on the sample holder, coat a layer of Au conductive film, the coating time is 10 min, put the standard particles on the scanning Observe in the electron microscope, set the magnification to 1500 times, select the standard particle concentration area for analysis, and the size of the analysis area is 20*20 um 2 , use the energy spectrum analyzer to collect the content data of each element contained in the standard particles in the selected analysis area, obtain the content curve of each element, and calibrate the standard particles Cd, Zn, Se, S and N in the element content curve , according to the integrated area of each el...
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