Selenides are chemical compounds that contain selenium, a non-metal element found in group 16 of the periodic table. These compounds typically consist of selenium combined with metals or metalloids, forming various types of selenides, such as cadmium selenide and zinc selenide. They are often used in electronics, optics, and as pigments due to their unique properties. In addition to their industrial applications, selenides can also be found in nature, where they may occur as minerals. Some selenides exhibit semiconductor properties, making them valuable in the development of solar cells and other electronic devices. Their study is important in both chemistry and materials science.