Used as a photosensitizer in photodynamic therapy for treating various cancers, particularly skin and certain solid tumors. When activated by specific wavelengths of light, it generates reactive oxygen species that destroy cancer cells. Also employed in organic semiconductors and photovoltaic devices due to its excellent light absorption and electron transfer properties. Its stability under light and heat makes it suitable for use in optical sensors and imaging agents. Additionally, it finds application in dye-sensitized solar cells and as a component in laser printers and photocopiers for its charge transport characteristics.