Cadmium selenide is a chemical compound made up of the elements cadmium and selenium. It appears as a bright yellow or red solid and is often used in various applications, including electronics and solar cells. Its unique properties make it valuable in the production of quantum dots, which are tiny semiconductor particles that have applications in displays and medical imaging. This compound is also known for its role in the field of nanotechnology. Due to its ability to emit light at specific wavelengths, cadmium selenide is utilized in the development of LEDs and other optoelectronic devices. However, it is important to handle it with care, as cadmium is toxic and poses health risks.