What is photoconductive detector?
Photoconductive detectors are a type of photodetectors which are based on photoconductive semiconductor materials. Here, the absorption of incident light creates non-equilibrium electrical carriers, and that reduces the electrical resistance across two electrodes.
Which of the following is a photoconductor?
The most commercially available photoconductive device is manufactured from cadmium sulfide (CdS) CdS (also called light-dependent resistor) whose resistance is inversely proportional to the amount of light falling on it.
What is the difference between photovoltaic and photoconductive?
The difference between these two classifications is that photoconductive detectors use the increase in electrical conductivity resulting from increases in the number of free carriers generated when photons are absorbed (generation of current), whereas photovoltaic current is generated as a result of the absorption of …
What is the photoconductive effect?
The alteration of electric conductivity produced by the absorption of varying amounts of radiation composed of photons.
What is photoconductive gain?
The gain G of a photoconductor following the definition of internal quantum efficiency is defined as the number of photogenerated charge carriers collected by the electrodes divided by the number of photons absorbed in the semiconducting photoconductor.
What is photoconductivity physics?
Photoconductivity is an optical and electrical phenomenon in which a material becomes more electrically conductive owing to the absorption of electromagnetic radiation, such as visible light, ultraviolet light, infrared light, or gamma radiation [13].
What are Photoconductors made of?
Intrinsic photoconductor materials include lead sulfide, lead selenide, cadmium sulfide, and mercury cadmium telluride, while germanium and silicon are the usual hosts for extrinsic photoconductors with impurities such as arsenic, copper, gold, and indium.
How does a photoconductive cell work?
Photoconductive cells function by receiving light energy, which in turn frees electrons from their valence bonds in semiconductor material.
What is the difference between photoconductive cell and photodiode?
Unlike standard photodiodes, which produce a current when exposed to light, the electrical resistance of the photoconductive material is reduced when illuminated with light.
Is silicon a photoconductor?
Which of the following is used in photoconductive cell?
Which of the following materials can be used as photoconductive transducer? Explanation: Photoconductive cells are materials which changes conductivity on the application of light. Explanation: Photo junction diodes are semiconductor layers formed by silicon and germanium which are used in photovoltaic cells.