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CAREER POINT

UNIVERSITYSubmitted to: Mr. Ravindra Meena

Submitted by:Ravi shankar(k12256)Rakesh(K12576)Rashi(k12589)Btech

Prepare the simulation modal of photo diode and verify I-V characterstics

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CONTENT

• Theory• Component used• Cuircut• Result

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• Photodiode technology developments came out of the basic developments of the PN junction diode that started in the 1940s in earnest. Applications for the use of the PN junction diode were found outside the basic use of rectifying signals.

• Photodiode technology was refined in the 1950s and in the latter part of that decade the PIN photodiode was developed. Light absorption in the wide depletion area of the PIN structure was first investigated in a paper published in 1959 by Gartner. Although silicon has been the favoured material for photodiodes, germanium can also be used, and its use was first demonstrated in 1962 by Riesz.

HISTORY & THEORY

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MATERIALS

STRUCTURE

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CHARACTERISTICS

Photodiodes are similar to regular semiconductor diodes except that they may be either exposed (to detect vacuum UV or X-rays) or packaged with a window or optical fiber connection to allow light to reach the sensitive part of the device. Many diodes designed for use specifically as a photodiode use a PIN junction rather than a p-n junction, to increase the speed of response.

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CHARACTERISTICS

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SIGNIFICANCE• In most cases, the photodiode is used to deliver a trigger signal

to an electrical device when it is either exposed to a UV ray or X-ray. It may also be used to deliver the same trigger signal when the light source is either turned off or the photodiode is blocked from the light source.

• A function that a photodiode can perform is to keep an electrical device operating through the process of converting light into a power signal or voltage.

• Photovoltaic mode and photoconductive mode are naturally occurring reactions to the light source create what is referred to as a photocurrent.

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• P-N photodiodes are not used to measure extremely low light intensities. Instead, if high sensitivity is needed, avalanche photodiodes, intensified charge-coupled devices or photomultiplier tubes are used for applications such as astronomy, spectroscopy, night vision equipment and laser rangefinding.

APPLICATIONS

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Archives

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TBreakDown Voltage:For small active area devices, by definition

breakdown voltage is defined as the voltage at which the dark current becomes 10 A. Since dark current increases with temperature, therefore, breakdown voltage decreases similarly with increase in temperature.

R I V I AS

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Thank you

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