Table of Contents
- 1 Why is the cut in voltage of silicon and germanium different?
- 2 Why breakdown voltage of silicon diode is greater than that of germanium diode?
- 3 What would cause the barrier of a silicon diode to decrease from 0.7 V to 0.6 V?
- 4 Why silicon diodes are more popular than germanium?
- 5 Why is silicon used more than germanium?
- 6 What is the barrier potential for germanium diode?
- 7 What is the voltage of a silicon diode?
- 8 What is the forward voltage of a germanium diode?
- 9 Which is the better element silicon or germanium?
Why is the cut in voltage of silicon and germanium different?
Silicon is cheaper than Germanium. Therefore, it’s preferred over Ge diode. 12. The forward voltage drop for Germanium junction is less, whereas for Silicon diode the forward voltage drop is low.
Why breakdown voltage of silicon diode is greater than that of germanium diode?
Detailed Solution. The main reasons for silicon diodes to be preferred over germanium diodes are: The Si diode has low reverse current compared to Ge. The Si diode has a large reverse breakdown voltage of about 70-100V compared to Ge which has the reverse breakdown voltage around 50V.
What would cause the barrier of a silicon diode to decrease from 0.7 V to 0.6 V?
What would cause the barrier potential of a silicon diode to decrease from 0.7v to 0.6v? An increase in temperature can cause the barrier potential of a diode to decrease.
What is the difference between germanium diode and silicon diode?
A Silicon Diode is a semiconductor that has both positive and negative charge polarity and can allow an electrical current to flow in one direction whilst restricting another. A Germanium Diode works in the same way but has a low forward voltage which results in it being a low power loss and an efficient diode.
What is the cut in voltage 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.
Why silicon diodes are more popular than germanium?
The variation of Collector cut off current with temperature is less in Silicon compared to Germanium. However, Silicon crystals are not easily damaged by excess heat. Peak Inverse Voltage ratings of Silicon diodes are greater than Germanium diodes. Si is less expensive due to the greater abundance of element.
Why is silicon used more than germanium?
Silicon crystals have fewer free electrons than germanium crystals at room temperature, which is why silicon crystals are used for semiconductor devices. In general, the ICBO of germanium is 10-100 times greater than that of silicon, but the variation of ICBo at any temperature is lower for silicon than for germanium.
What is the barrier potential for germanium diode?
The barrier potential of germanium is approximately 0.3 V, and of silicon is 0.7 V. These values cannot be measured directly and appears across the space charge region of the junction.
What is the barrier voltage of a silicon diode?
The barrier voltage for silicon diode is 0.7 volts and for germanium is 0.3 volts.
Why silicon type diodes are more preferred compared to germanium?
Why is silicon usually preferred to germanium in the manufacture of semiconductor devices? Silicon is abundant on the earth’s surface and therefore cheaper than germanium. The PIV (Peak Inverse Voltage) rating of silicon is much higher than germanium and therefore can withstand much higher temperatures than germanium.
What is the voltage of a silicon diode?
The results of this experiment appear to satisfy the theory behind diodes. The measured cut-in voltage for a Silicon diode was approximately 0.6 volts, and similarly for the Germanium diode 0.2 volts. These are both very close to the expected cut-in voltages.
What is the forward voltage of a germanium diode?
With silicon diodes, this forward threshold voltage is approximately 0.6 V to 0.7 V. With germanium diodes, the forward threshold voltage is approximately 0.2 V to 0.3 V. The figure below shows typical characteristics for small germanium and silicon diodes.
Which is the better element silicon or germanium?
The potential Barrier of Silicon is more compared to Germanium. The potential barrier for Silicon is 0.6 to 0.7 V while for Germanium is 0.2 V. But if we consider the advantages of Silicon, we can conclude that Silicon is the best element for the Semiconductor Devices and Applications.
Where does the diode in the periodic table come from?
Full diode model The diode is a semiconductor device constructed from silicon or other elements from column IV of the periodic table. These materials like Si and Ge are poor conductors of electricity. By doping Si with small amounts of an element from column III (eg.