A method for measuring the coverage of ligands on the surface of quantum dots
A technology of surface ligand and measurement method, applied in the field of quantum dots, can solve the problems of affecting the light-emitting layer thin film, low pixel resolution, non-uniform photoelectric efficiency, etc.
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[0041] To determine the coverage of phosphorus-containing ligands on the surface of CdZnSeS quantum dots:
[0042] Determine the average particle size d of CdZnSeS quantum dots. Take the surface ligand of cetyl phosphoric acid and trioctylphosphine CdZnSeS quantum dots dissolved in n-hexane solution, the prepared 1 mg / ml solution, after the solution is completely dissolved, take a small amount of quantum dot solution drops 10 drops on the copper mesh, the carbon mesh is placed in a transmission electron microscope analyzer for test analysis. The setting acceleration voltage is 300kV, the transmit current is 20μA, the working distance is set to 20 mm, and the dead time is 40%. For the amplification analysis of the sample, the magnification is set to 100,000 times, and the concentrated and uniformly dispersed area of the quantum dots is taken for focus analysis, and the TEM picture is taken. The TEM picture was analyzed, the ruler length was set first, and then 30-80 quantum dots ...
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