Photo-conductive and photo-voltic devices

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In summary, photo-conductive devices use a photo-conductive material to detect light and convert it into an electrical signal, while photo-voltic devices directly convert light energy into electrical energy. Both types of devices have different working mechanisms and are commonly used in light sensing, energy conversion, and electronic devices. They differ from traditional electronic devices in their reliance on light rather than electron movement. Although they have advantages such as efficiency and eco-friendliness, they can be expensive and sensitive to temperature changes.
  • #1
HNM
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I am geting confused ( :confused: ) that what is the difference between photo-conductive and photo-voltic devices.

as boath devices depends on the intensity of light, boath depends on no of charge cariers,...
In boath cases there is movement of charge cariers , so there is a flow of current, then what is the difference :(
 
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  • #2
Imho the difference you are looking for is that photoconductive devices only change their conductivity when exposed to light while photovoltaics actually generate electrical power by the means of voltage induced by EMR.
 
  • #3
hmmmm thanks , its looking right ans thanks , :)
 

1. What is the difference between a photo-conductive and photo-voltic device?

A photo-conductive device is a type of sensor that uses a photo-conductive material, such as silicon or germanium, to detect light and convert it into an electrical signal. A photo-voltic device, on the other hand, is designed to directly convert light energy into electrical energy, typically through the use of a semiconductor material.

2. How do photo-conductive and photo-voltic devices work?

Photo-conductive devices work by increasing their electrical conductivity when exposed to light. This change in conductivity can then be measured and converted into an electrical signal. Photo-voltic devices, on the other hand, use the photoelectric effect to directly convert photons into electron-hole pairs, generating an electrical current.

3. What are some common applications of photo-conductive and photo-voltic devices?

Photo-conductive devices are commonly used in light sensors, optical switches, and photocopiers. Photo-voltic devices, also known as solar cells, are widely used in solar panels to generate electricity from sunlight. They are also used in calculators, watches, and other small electronic devices.

4. How do photo-conductive and photo-voltic devices differ from traditional electronic devices?

Traditional electronic devices, such as transistors and diodes, rely on the movement of electrons within a solid material to generate an electrical signal. Photo-conductive and photo-voltic devices, on the other hand, utilize the properties of light to produce electrical signals, making them ideal for applications involving light detection and energy conversion.

5. What are the advantages and disadvantages of using photo-conductive and photo-voltic devices?

The main advantage of photo-conductive and photo-voltic devices is their ability to directly convert light into electrical energy, making them efficient and environmentally friendly. However, they can be more expensive to manufacture and may have limited performance in low light conditions. Additionally, some photo-voltic devices can be sensitive to temperature changes and require careful handling and installation.

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