Used as a precursor in the synthesis of erbium-containing materials for advanced electronic and optical applications. Plays a role in chemical vapor deposition (CVD) processes to form thin films of erbium oxide or doped semiconductors, which are utilized in optoelectronic devices such as amplifiers and lasers, particularly in fiber-optic communication systems. Also investigated in the preparation of catalysts for polymerization reactions and in research settings for developing luminescent materials due to erbium’s favorable photophysical properties in the near-infrared range.