photoconductors
Electricity from illumination
Photoconductors are materials that become more electrically conductive when exposed to light.
In darkness they resist current; illumination frees electrons and allows current to flow.
This property makes them essential in devices like photocopiers, laser printers, and light sensors, where light patterns must be converted into electrical signals or static charges.
Element number thirty-four
- photocopiersMachines reproducing documents
- laser printersMachines producing pages via focused light
- electrophotographyImaging via charged photoconductors
- xerographyDry electrostatic copying process
photoreceptors · toner · exposure · light sensitivity · semiconductors · zinc oxide · print quality · discharge
Liberated charge carrier couples
- conductivityAbility to carry current
- illuminationProvision of light
- recombinationGenetic material exchange process
- trappingCatching with concealed devices
gain · response time · intrinsic · extrinsic · sensitization
Devices that detect input
- barcode readersStripe pattern interpreters
- security systemsProtective monitoring installations
- smoke detectorsDevices sensing airborne combustion particles
- solar cellsLight-to-electricity converters
selenium
Element number thirty-four
- photocopiersMachines reproducing documents
- laser printersMachines producing pages via focused light
- electrophotographyImaging via charged photoconductors
xerography · photoreceptors · toner · exposure · light sensitivity · semiconductors · zinc oxide · print quality · discharge · coating
electron-hole pairs
Liberated charge carrier couples
- conductivityAbility to carry current
- illuminationProvision of light
- recombinationGenetic material exchange process
trapping · gain · response time · intrinsic · extrinsic · sensitization
sensors
Devices that detect input
- barcode readersStripe pattern interpreters
- security systemsProtective monitoring installations
- smoke detectorsDevices sensing airborne combustion particles