3/29/19- Facetime Call with Talha Erdem

Talha Erdem is from University of Cambridge During our Facetime call with Talha, he talked about alot of things, this helped us expand our knowledge of quantum dots and all of the different kinds of quantum dots that are on the market right now. He helped establish which kind and color of quantum dot would be the best to use for our experiment, since quantum dots come in a lot of different colors. Some highlights from our Facetime call was what quantum dots are, quantum dots are a color converter, this means that they will absorb a color and convert it to another color. Talha told us the reason why orange quantum dots would be the best to use for our experiment and not another color quantum dots and the reason is because of the way that different dots absorb the different wavelengths. Larger quantum dots such as 5-6 nanometers emit longer wavelengths. For example, the problem with let's say... red quantum dots is the strength of the absorption of the quantum dots increased, increasing wavelengths. For example, red quantum dots will absorb wavelengths such as orange, yellow, green and blue so it would lose the intensity of all of the colors. Orange quantum dots will absorb the greenish and the blueish parts of the color. We would have to use Indium Phosphide based quantum dots or a quantum dot solution. In addition, Talha told us how to make the film ourselves if we were buying the solution we would have to blend it with a polymer. He continued to tell us, that solutions are much cheaper than the films, depending on our budget that we have we could decide on which item we wanted to get to pursue our experiment. Talha was so much help to my class and I to gain a deeper knowledge of quantum dots.