الاختلافات بين دايودات السيليكون ودايودات الجرمانيوم وأيهما افضل
Silicon
- The silicon diodes have higher PIV (peak inverse voltage)with max as 1000V
- Si diodes have wider operating range
- Higher cut-off voltage (0.7V)
- Lower saturation current
Germanium
- The Ge diodes have lower PIV with maximum PIV around 400V.
- The Ge diodes have small operating range.
- Lower cut-off voltage (0.3 V)
- Higher saturation current
The above points would also make it clear why the silicon diodes are better than germanium diodes.
REVERSE SATURATION CURRENT: The Ge diode is more temperature dependent than Si diode. The value of ni2 for Ge diode is more that of Si diode. Hence there would be more number of minority carriers and hence reverse saturation current is larger in germanium diode.
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