Fotokondüktif

Fotokondüktif refers to a material that changes its electrical conductivity when exposed to light. This phenomenon is known as photoconductivity. When light photons strike a fotokondüktif material, they can excite electrons from the valence band to the conduction band, or create electron-hole pairs. This increased number of charge carriers within the material leads to a higher electrical conductivity. The degree of conductivity change is dependent on the intensity and wavelength of the incident light, as well as the specific properties of the fotokondüktif material itself.

Many semiconductor materials exhibit fotokondüktif properties. Common examples include selenium, cadmium sulfide (CdS), and cadmium selenide (CdSe). The sensitivity and response time of these materials can vary significantly. Fotokondüktif devices are utilized in a wide range of applications where light detection or light-controlled electrical resistance is required.

Notable applications include light sensors in cameras and other photographic equipment, automatic street lights that turn on when it gets dark, and in optical switches. The principles of fotokondüktif materials are fundamental to the operation of photodiodes, phototransistors, and image sensors found in digital cameras. The ability to convert light signals into electrical signals makes fotokondüktif materials a crucial component in optoelectronic technology.