photoconductivity

Photoconductivity is the increase in a material's electrical conductivity when it absorbs light. When light photons hit the material, they excite its electrons, giving these electrons enough energy to move freely and carry an electric current. This process enhances the material’s ability to conduct electricity temporarily, only while it is illuminated. Photoconductivity is useful in devices like photodetectors, solar cells, and light sensors, where detecting or converting light into electrical signals is essential. Essentially, exposure to light transforms the material into a better conductor, enabling various optical and electronic applications.