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Why is the reverse saturation current of germanium diode more than silicon?
Wiki User
∙ 13y ago
Germanium has four number of shells while Silicon has three number of shell. therefore for germanium less energy is required to move the electron from valence band to conduction band if compared to silicon.
So at room temperature for germanium their are more number of electrons present in conduction bond hence more number of holes present in the valence energy band. Due to movement of holes reverse saturation current is produced.
Their is more number of hole movement in germanium comparatively therefore reverse saturation current is more than silicon for germanium.
You may refer to Electronic Devices and Circuits by Allen Mottershead
Regards,
Zain Ijaz
UCTI, Malaysia
Mechatronic Engineer.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoA: a silicon diode has better temperature coefficient higher breakdown voltage higher current capability and low leakage. a germanium diode however does have a lower forward voltage drop.
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Why you use silicon not germanium in SCR?
because lekage current of silicon is less than germenium
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.
Can you explain why silicon and germanium are used in the manufacturing of semiconductors?
silicon is less sensitive towards temperature.It costs low compared to germanium,
Why germanium and silicon are not preferred in LEDs?
A: Because the element has different property as gallium arsenide.
What kind of material is a transistor made from?
The class of materials that make up transistors is "semiconductor." A transistor is often made from very pure silicon that is doped with germanium or other dopant to change its electrical properties.
Why multimeter not measuring a peak value?
Reverse saturation current of silicon is in nano ampear therefore it is prefered over germanium
What is represented by 'A' in 'OA79' diode?
The symbol 'A' indicates that this device is made from germanium . as you may know germanium has less cut in voltage so this device is used for low power signal or for signal processing. also the leakage current or reverse saturation current of germanium is greater than silicon.
Why leakage current of germanium is more than silicon?
Because the space charge region or depletion region is small in germanium compared to silicon hence leakage current is more in germanium than silicon
Why don't use germanium in silicon controlled rectifier?
the leakage current of silicon is less when compared with the leakage current of germanium.. hence scr's are made up of silicon than germanium.. hope tis one is useful to u all!- Vignesh.L(engineer, 1st year)
Why you use silicon not germanium in SCR?
because lekage current of silicon is less than germenium
What is the advantage of silicon diode in other types in changing AC to DC?
Property Germanium silicon Depletion layer 0.15V 0.6V Forward Current milli amperes tens of amperes Reverse leakage micro amperes nano metres Current
What will be the result if silicon diode is replaced by the germinium diode?
The built is voltage would be lower than silicon diode,more leakage or reverse saturation current,poor thermal stability,high noise and greater conduction in comparison to silicon diodes.
Why silicon is preferred over germanium in the fabrication of p-n junction diode?
Germanium diodes are more expensive than silicon ones, germanium is harder to process, germanium cannot be used to make integrated circuits (while early prototype integrated circuits were germanium the wiring between the integrated components cannot be integrated making it too expensive for production), germanium cannot operate with a junction temperature above 60C (silicon will operate up to 150C), and its reverse leakage current is greater. However! Germanium diodes have a lower forward voltage drop than silicon ones do, so they're better for some applications, like radio frequency detection.
Where is germanium and silicon located in computer chips?
Germanium is not used in integrated circuits. Silicon is.
Can you give examples of elements that are metalloids?
The metalloids are Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, and Polonium.
What is the difference of silicon diode and germanium diode?
A silicon diode has a voltage drop of approximately 0.7V, while a germanium diode has a voltage drop of approximately 0.3V. Though germanium diodes are better in the area of forward voltage drop, silicon diodes are cheaper to produce and have higher breakdown voltages and current capabilities.
What element is used in making transistors and chips?
Silicon and Germanium are the elements used in transistors
