What is nickel (ii) selenide formula?

The formula of nickel (ii) selenide is NiSe. It is a chemical compound composed of nickel ions (Ni2+) and selenide ions (Se2-). It is a black solid with a melting point of 965°C and is insoluble in water. Nickel (ii) selenide is used in the production of nickel selenide thin films, which are used in electrochromic devices, photovoltaic cells, and other electronic applications. It is also used as a catalyst in various chemical reactions and as a dopant in semiconductor materials.