Used in fiber optics for high-speed data transmission due to its ability to detect infrared light. Key component in infrared optics, including night vision systems and thermal imaging cameras. Acts as a catalyst in polymerization processes for producing polyesters. Employed in electronics as a semiconductor material in transistors and diodes, especially in high-frequency applications. Used in solar cells to improve efficiency in photovoltaic devices, particularly in multi-junction solar cells. Applied in some medical imaging devices and radiation detectors. Found in certain types of wide-angle lenses and camera optics for its high refractive index.