Used in fiber optics for high-speed data transmission due to its ability to efficiently transmit infrared light. Serves as a key component in infrared optics, including night vision systems and thermal imaging devices. Employed as a semiconductor material in electronics, especially in transistors and integrated circuits requiring high performance at elevated temperatures. Utilized in solar cells to enhance efficiency in converting sunlight to electricity, particularly in multi-junction photovoltaic cells. Acts as a catalyst in the production of polyethylene terephthalate (PET) plastics. Also used in some types of medical imaging and radiation detection equipment.