Photoelectric devices

Photoelectric devices

Devices which give an electrical signal in response to visible, infrared, or ultraviolet radiation. They are often used in systems which sense objects or encoded data by a change in transmitted or reflected light. Photoelectric devices which generate a voltage can be used as solar cells to produce useful electric power. The operation of photoelectric devices is based on any of the several photoelectric effects in which the absorption of light quanta liberates electrons in or from the absorbing material. See Solar cell

Photoconductive devices are photoelectric devices which utilize the photo-induced change in electrical conductivity to provide an electrical signal. Photoemissive systems have also been used in photoelectric applications. These vacuum-tube devices utilize the photoemission of electrons from a photocathode and collection at an anode. See Photoconductive cell

Many photoelectric systems now utilize silicon photodiodes or phototransistors. These devices utilize the photovoltaic effect, which generates a voltage due to the photoab-sorption of light quanta near a pn junction. Modern solid-state integrated-circuit fabrication techniques can be used to create arrays of photodiodes which can be used to read printed information.

References in periodicals archive ?
Nanosilica has applications in ceramics, chromatography devices, electronic pieces, photoelectric devices, etc.
The photosensitive device developed at Exeter contains no metals and is therefore completely transparent but, as it can detect light from across the whole visible light spectrum, it is as efficient at sensing light as other recently developed opaque photoelectric devices.
Washington, Apr 20 ( ANI ): Researchers at the University of Exeter have developed a new photoelectric device that is both flexible and transparent.
We'll reduce the printed materials and increase the photoelectric devices.
Papers from the conference present the latest research results and future directions in MEMS/nano-manufacturing technology, precision mechanical manufacturing technology, and manufacturing technology for photoelectric devices and semiconductors.
provisional patent applications covering novel materials for use in fuel cells and electrolysers; "key" technological elements important to the application of the company's proprietary "in-situ" manufacturing process for membrane electrode assemblies (MEAs) and cell stacks; and photoelectric devices.
The Institute for the Commercialization of Public Research (the Institute) announced today that it has finalized a funding agreement with NanoPhotonica, an early-stage Orlando-based company that develops nanomaterials for next generation video displays, solar cells, and a range of other photoelectric devices.
Song served as a professor at Hebei University in China, where his teaching and research covered a broad spectrum of topics, including solar cells, silicon materials, photoelectric devices and automation engineering.

Full browser ?