Thin film deposition is a process in which a thin layer of material is deposited onto a substrate, typically using a vapor phase or liquid phase method. In this case, it refers to the deposition of carbazole molecular glasses onto a surface.
Carbazole molecular glasses are a type of organic compound that have a carbazole core and glass-forming functional groups. They are commonly used in thin film deposition for their unique properties, such as their ability to change color when deposited in thin films.
The color change in carbazole molecular glasses is due to a phenomenon called aggregation-induced emission (AIE), where the molecules are forced to aggregate and emit light when in a solid state. This aggregation is induced during thin film deposition, resulting in a change in color.
The color-changing properties of carbazole molecular glasses make them useful in various applications, such as in optical sensors, displays, and optoelectronic devices. They can also be used as coatings for anti-counterfeiting purposes, as the color change is difficult to replicate.
One of the main challenges in thin film deposition of carbazole molecular glasses is controlling the thickness and uniformity of the deposited film. This can affect the color and properties of the film. Another challenge is finding the right deposition method and conditions to induce the desired color change. Additionally, the stability and long-term performance of the thin film must also be considered.