P-n Junction Diode.ppt - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. A zener diode when reverse biased can either undergo avalanche break down or zener break down. A PN-junction diode is formed when a p-type semiconductor is fused to an n-type semiconductor creating a potential barrier voltage across the diode junction The effect described in the previous tutorial is achieved without any external voltage being applied to the actual PN junction resulting in the junction being in a state of equilibrium. This Presentation is a very informative piece on PN Junction Diode an important part of electronics education They “RECOMBINE” by filling up the “empty” positions. PN junction diodes can be obtained in a number of semiconductor materials - the earliest diodes tended to be made from germanium, but most of them today are silicon diodes. p-n junction diode can be used as a photodiode as the diode is sensitive to the light when the configuration of the diode is reverse-biased. When the diode is forward-biased, it can be used in LED lighting applications. Image Source. A PN junction photodiode is made of two layers namely p-type and n-type semiconductor whereas PIN photodiode is made of three layers namely p-type, n-type and intrinsic semiconductor. In PIN photodiode, an addition layer called intrinsic semiconductor is placed between the p-type and n-type semiconductor to increase the minority carrier current. Exploring further charge and diode notes receives a zener diode junction in … Forward biasing a pn junction diode is very simple. Semiconductor Diodes The symbol for a semiconductor diode is corresponding to the p-n junction. ... Made of silicon pn junction Heavily doped to reduce the breakdown voltage Used for operation in the reverse breakdown … You just need to take a battery whose values can be varied from (o to V volts), connect its positive terminal to the p-side of pn junction diode and then connect the negative terminal of battery to the n-side of the pn junction diode. Relieve the pn junction diode lecture ppt doc book free and low. o Thus the P N junction diode allows the electrons flow only when P is positive , o This property is used for the conversion of AC into DC , Which is called rectification. Avalanche break down:-If both p-side and n-side of the diode are lightly doped, depletion region at the junction widens. The bias, denoted by V D, is applied external voltage across the two terminals to extract a response. 13 40 30 20 10 40 Forward Bias Region 140 V (volts) 120 80 0.4 2 6 0.8 12 V (volts) Reverse Bias Region Figure 5.1: Diode Characteristics Applications of PN Junction Diode. Without bias across a diode, the net flow of charge in one direction is zero. They also now that is a pn junction diode is increased further into intimate contact with the doping. It can be used as a solar cell. Forward biasing a PN Junction diode. p- n diode applications: Light emitters P-n junction can emit the light when forward biased p-type n-type +-Electrons drift into p-material and find plenty of holes there. A zener diode when forward biased behaves like an ordinary P-N junction diode. 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