Used as a photosensitizer in photodynamic therapy due to its strong absorption in the visible light range and ability to generate singlet oxygen. Its extended conjugation and silicon-containing side groups enhance photostability and solubility in organic solvents, making it suitable for thin-film applications in organic photovoltaics and light-emitting diodes. Also employed in sensing platforms for metal ion detection, where fluorescence quenching or enhancement occurs upon binding to specific cations. The trimethylsilyl-ethynyl groups allow further functionalization via desilylation, enabling covalent attachment to surfaces or polymers for use in molecular electronics and catalytic systems.