Difference between organic photosensitizer and dye photosensitizer

1, with different meanings: photosensitizer refers to an organic compound in photodynamic therapy, which converts oxygen into singlet oxygen under the irradiation of light with a certain wavelength (not specifically sunlight) and has cytotoxicity to kill tumor cells or other cells. In dye-sensitized semiconductor solar cells, because the band gap of some semiconductors (such as TiO2 _ 2) is equivalent to the energy in ultraviolet region, the ability to capture sunlight is very poor, so it can not be directly used for solar energy conversion. Dyes with this property are called dye photosensitizers, also known as photosensitive dyes.

2. Different characteristics: Photosensitizers have very high chemical stability, outstanding redox characteristics and good visible spectrum response characteristics. Dye photosensitizer can be closely adsorbed on the surface of wide band gap semiconductor, which requires that dye molecules contain polar groups such as carboxyl and hydroxyl.