Quantum Yield(QY) decreases significantly when I coat my PbS QDs (It decreases from 50% (in solution form) to a maximum of 18%(in the thin-film). A possible explanation is that QDs get closer to each other in films. Is there any way to improve QY of films? I've tried a number of solutions including embedding in polymers, mixing with paint, varnish, etc, but haven't succeeded yet.
Andrei Pligovka
Dear Samira Garshasbi, PbS QDsmust be applied to the developed surface and encapsulated. As a solution, I can offer conductive niobium oxide nanocords. I have just submitted a project on this subject together with Chinese scientists. Glad will cooperate. See my work:
Article Anodic Niobia Column-like 3-D Nanostructures for Semiconductor Devices
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