Photoactive materials are materials that can exhibit a change in properties or behavior when exposed to light. These materials are commonly used in a variety of applications, including solar cells, photodynamic therapy, and light-responsive sensors and switches. The properties of photoactive materials can be tuned by changing their chemical composition, structure, or morphology, allowing for a wide range of applications and potential technological advancements. Research in this area focuses on developing new photoactive materials with improved performance, efficiency, and stability for various applications.