Method for measuring coverage rate of quantum dot surface ligand
A surface ligand and measurement method technology, applied in the field of quantum dots, can solve problems such as uneven photoelectric efficiency, poor uniformity of quantum dot solution, and uneven panel quality
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Embodiment 1
[0044] Determination of coverage of octylthiol ligands on the surface of CdZnSe / CdZnSe / ZnSe quantum dots.
[0045] Determine the average particle size d of the CdZnSe / CdZnSe / ZnSe quantum dots. Take the CdZnSe / CdZnSe / ZnSe quantum dots whose surface ligand is octylthiol and dissolve them in n-hexane solution to prepare a 5 mg / ml solution. After the solution is completely dissolved, take a small amount of quantum dot solution and drop 5 drops on the copper grid. The copper grid was placed in a transmission electron microscope analyzer for testing and analysis. Set the accelerating voltage to 200kV, the emission current to 10μA, the working distance to 15 mm, and the dead time to 20%. For magnification analysis of the sample, first set the magnification to 70,000 times, take the area where the quantum dots are concentrated and uniformly dispersed for focusing analysis, and take its TEM picture. To analyze the TEM image, first set the scale length, and then take 30-80 quantum dot...
Embodiment 2
[0050] Determining the coverage of octadecylphosphate on the surface of CdZnSe quantum dots.
[0051] Determine the average particle size d of the CdZnSe quantum dots. Take the CdZnSe quantum dot whose surface ligand is octadecylphosphoric acid and dissolve it in n-hexane solution to prepare a 3 mg / ml solution. After the solution is completely dissolved, take a small amount of quantum dot solution and drop 8 drops on the copper grid. The net is placed in a transmission electron microscope analyzer for testing and analysis. Set the accelerating voltage to 300kV, the emission current to 20μA, the working distance to 20 mm, and the dead time to 40%. For magnification analysis of the sample, first set the magnification to 150,000 times, take the area where the quantum dots are concentrated and evenly dispersed for focusing analysis, and take its TEM picture. To analyze the TEM image, first set the scale length, and then take 30-80 quantum dots for calibration, and calculate the ...
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