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What is the typical value of the barrier potential for a silicon diode?
Wiki User
∙ 6y ago
Forward biase the given diode by using a Variable resistor in the circuit. By adjusting the value of variable resistor you will adjust the voltage being applied to junction diode. First adjust the resistance such that no(negligble) current flows through the circuit. Now start decreasing the value of resistance. Note the voltage across resistor(Vr) when current just starts flowing through the circuit. Then Potential barrier of diode will be: Vb=V-Vr Vb:Barrier Potential V:Battery Voltage Vr:Voltage Drop across resistance when current just starts flowing through the circuit.
Wiki User
∙ 16y ago
Wiki User
∙ 13y agoIn silicon, about 0.7 volts. In germanium, about 1.5 volts.
Let me fill some for this.....
For the silicon diode, barrier potential voltage is about 0.65 V , For the germanium diode is about 0.25 V.
Wiki User
∙ 13y agoThe barrier potential for Si diode is 0.5 to 0.7 v and for ge diode is 0.1 to 0.3 v.
Wiki User
∙ 10y agoThe voltage at which appreciable current flows through the diode.
Wiki User
∙ 14y ago0.7 Volts
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Convert potential energy into light energy?
light bulb. Incandescent: Filament in an environment absent of oxygen, glows white hot when electricity passes through it producing light. Fluorescent: electrode "excites" mercury vapor which produces U.V. rays. U.V. rays hit a phosphorus coating on the inside surface of the bulb. The phosphorus coating adsorbs the U.V. ray and remits it as visible light. Light Emitting Diode or LED : Silicon crystal emits light when electricity passes through the diode in a certain direction. Organic Light Emitting Diode or OLED: Instead of a silicon crystal an organic-compound in used. Note: fire could be considered an answer.
How does the selenium diode work?
Selenium diodes work much like any other diode. They allow current to flow in a forward direction and block current from flowing in the opposite direction. They have a higher forward bias voltage then silicon and as such generate much more heat then a comparable silicon diode. Most selenium diodes will therefore have an integrated heat sink that helps to dissipate all the heat generated. As a zener diode, selenium is used in surge suppression where its heat sink helps in survivability during a surge. However, its low alpha (measure of nonlinearity) means that the voltage during a surge is very high and usually unsuitable to be used as protective device without other components in parallel. The reverse voltage is about 26 Volts, so to get higher voltage zener diode, many are placed in series. By connecting them back to back, then a bidirectionial zener diode can be created. Selenium diode were very common in the 1950s and can be seen in industrial applications of the time. Some model train power supplies were seen to use these components. Since the advent of silicon diodes and their more efficient operation, these part have disappeared from use.
Why we can't use silicon and germanium in laser diode?
becoz Si and Ge are indirect bandgap semiconductors. for lasing action direct bandgap semiconductors are required of the type In Ga As P
You got to replace a full wave bridge recitifer its a 24 volt 5 amp can it be replaced by one that is 50 volt and 25 amps?
Yes. If it fits it should work. I am assuming this is not a high frequency or sensitive application and that it is a silicon bridge. I know of no 24 volt rated diode or diode bridge. Gil
What is the solid state diode?
A solid-state diode is a diode where the electrons flow through only solid materials. Nearly all diodes in common use are solid-state.
What is the typical value of the barrier potential for a germanium diode?
0.3v as opposed to the silicon 0.6v
Compare the characteristics of a silicon and germanium diode?
Potential barrier of silicon is 0.7, whereas potential barrier of germanium is 0.3
Why can't the potential barrier of a diode be used as a voltage source?
The potential barrier of a diode is caused by the movement of electrons to create holes. The electrons and holes create a potential barrier, but as this voltage will not supply current, it cannot be used as a voltage source.
What is the cut in voltage of germanium and silicon diodes?
cut in voltage *** for silicon is 0.7volts and that for germanium is 0.3volts.According to Millman and Taub, "Pulse, Digital and Switching Waveforms", McGraw-Hill 1965, the cutin (or offset, break-point or threshold) voltage for a silicon diode is 0.6, and 0.2 for germanium.Breakdown voltage is another thing entirely. It is the reverse voltage at which the junction will break down.
Why does a diode not conduct until the cut in voltage is reached?
Cut in voltage is the minimum voltage required to overcome the barrier potential. In other words it is like trying to push a large boulder....it may not be possible to push a large boulder by one person but it may be done if 2 or more people try to push it together depending on the size of the boulder.....similarly....the charge carriers in the barrier region have a potential energy of about 0.6V for Silicon and about 0.2V for Germanium. so in order for the diode to conduct, it is required to overcome the potential of the charge carriers in the junction barrier region and hence only if a potential more than that of the barrier potential (cut off voltage) is applied, then electrons flow past the junction barrier and the diode conducts.
What is the lifetime of barrier voltage in a diode?
The barrier voltage of a diode is 0.7v for silicon and 0.3 for germanium. after this voltage is reached the current starts increasing rapidly... till this voltage is reached the current increases in very small steps...
What is a substitute for a germanium diode?
There is no exact substitute for a germanium diode, except another germanium diode. However if the only concern is to get a lower forward voltage drop than that of a silicon diode (0.7V), then a schottky barrier diode may be a suitable replacement as its forward voltage drop (<0.1V) is even lower than that of a germanium diode (0.2V).
What is the temperature of germanium diode compare to silicon diode?
97f
What is more referred to use si diode or a ge diode?
silicon diode is preferred more when compared with germanium diode because in silicon diode the operating voltage is 0.7v where as in germanium diode the operating voltage is 0.3v , germanium is temperature sensitive so it can be easily destroyed by increasing temperature hence silicon diode is preferred more
What parameter in a germanium diode differs from those in a silicon diode?
germenium diode contains majority electron as a charge carriers while the silicon diode contains holes as a majority charge cariers,
What are the Characteristics of a silicon diode?
our raight
What is the definition of silicon diode?
A silicon diode is a tiny electronic component having two terminals, usually a switch or limiting device.
