Quantum dots refers to a phenomenon whereby a group of electrons frozen in a dielectric material, most often a semiconductor behaves as the valence shell of an atom that virtual show the unusual properties of materials especially in absorption and emission of light.
It is likely
The next major advance LEDs, lasers and photovoltaic cells are quantum dots, and would now be manufacturing companies, lasers and LED photovoltaic cells that will benefit. There is also potential as biomarkers to aid in the identification of genes and other molecular-scale objects.
A Google search on quantum dots becomes much more than previous years, so obviously there is a proliferation of small businesses in development and promotion of companies to choose from, but as with any new technology, it would be hard to pick a winner. But it is fair to say that once something is long enough to really be profitable, a larger company that will benefit from collecting the implementation and long term, the company reaps the benefit.
In fact, when I first read of quantum dots in the book "Hacking Matter", I could only find a start-up to manufacture and sell the quantum dots to research labs and am not able to find that the company on the web today, perhaps due to the large number of companies that have emerged in recent years, or perhaps because of infant mortality.
That would be better
Switch to the infant mortality rate of new enterprises and invest in large companies will benefit in the long term.