Chalcogen elements, such as sulfur (S), selenium (Se), and tellurium (Te), are found in a class of compounds known as ... Chalcogen elements, such as sulfur (S), selenium (Se), and tellurium (Te), are found in a class of compounds known as chalcogenides. These elements are usually found in association with metals. Due to their numerous intriguing characteristics, these compounds are crucial for a wide range of scientific and technical applications. Metal chalcogenides, in which a metal is coupled with one or more chalcogen atoms, are a well-known class of chalcogenides. These substances frequently exhibit distinctive optical, magnetic, and electrical characteristics. As an example, transition metal chalcogenides, such tungsten diselenide (WSe2) and molybdenum disulfide (MoS2), have drawn a lot of interest in the study of two-dimensional materials because of their intriguing electrical characteristics and their uses in electronic devices. Chalcogenides are essential to semiconductor technology as well. Amorphous chalcogenides, such as amorphous silicon chalcogenides, are extensively employed in phase-change memory and rewritable optical storage devices. These materials can be found in two different states: crystalline and amorphous. Heat can be used to create a transition between these states, which enables the storing of non-volatile data. Because of its special optical qualities, chalcogenide glasses are useful in applications such as fiber optics and infrared optics. These glasses are renowned for their longer wavelength light transmission and transparency in the infrared spectrum. Chalcogenide glasses are therefore used in optical fibers for sensors, imaging equipment, and communication systems. Chalcogenides are used in energy storage as well. Potential cathode materials for lithium-ion batteries are being researched, including lithium chalcogenides like lithium sulfide (Li2S) and lithium selenide (Li2Se). In comparison to conventional cathode materials, these substances can provide higher energy densities, which can aid in the creation of batteries that are stronger and more efficient. To sum up, chalcogenides are a broad and flexible class of materials with uses in energy storage, electronics, optics, and other fields. These substances' special qualities continue to inspire advancements in a wide range of scientific and technological domains.