1. A substance or molecule that absorbs light energy and initiates a photochemical reaction, commonly used in medical treatments and industrial processes.
Usage: technical; chemistry and medicine

Examples

• The photosensitizer was activated by exposure to blue light during the treatment.
• Chlorophyll acts as a natural photosensitizer in plant photosynthesis.
• Doctors use photosensitizers in photodynamic therapy to target cancer cells.
• The photosensitizer absorbed the laser energy and converted it into reactive oxygen species.
• Different photosensitizers have varying wavelength absorption characteristics.
• The new photosensitizer showed improved efficiency in converting light to chemical energy.