Used in fiber optics for high-speed data transmission due to its ability to efficiently transmit infrared light. Commonly applied in infrared optics, including night vision systems and thermal imaging cameras. Serves as a semiconductor material in electronics, especially in transistors and integrated circuits. Utilized in solar cells to improve efficiency, particularly in multi-junction photovoltaic devices. Acts as a catalyst in the production of polyethylene terephthalate (PET) plastics. Employed in some medical imaging devices and radiation detection equipment.