1. A semiconductor a material that can conduct electricity better than an insulator but not as good as a conductor (dia dok tengah-tengah).
2. Some examples of semiconductors are silicon, germanium and selenium.
3. 'Doping' a semiconductor means adding a small amount of other substances such as antimony or boron atoms to pure semiconductors to increase their conducting abilities.
4. So, when we add a little bit of boron to some silicon, the silicon is 'doped', and it can conduct electricity better than pure, unaltered silicon.
5. In this lesson, we are introduced to pentavalent atoms and trivalent atoms. What the hell are they?
6. A pentavalent atom is an atom that has five valence electrons. Example; phosphorus, antimony. A trivalent atom is an atom that has three valence electrons. Example; boron, gallium.
7. Semiconductors doped with penta atoms become n-type semiconductors. They have negative electrons as majority charge carriers.
8. If doped with tri atoms, they become p-type semiconductors. They have positive holes as majority charge carriers.
9. A diode is a device which allows current to flow through it it one direction only.
10. A semiconductor diode is basically a p-type and a n-type joined together.
11.Forward-biased= anode connected to positive terminal of battery, cathode negative. Reverse biased=vice versa.
12. Special power; diodes can be used a.c into d.c. This is called rectification.
13. A capacitor fuctions to smoothen the current that is rectified (ac to dc) by discharging current when diode is reversed biased.
2. Some examples of semiconductors are silicon, germanium and selenium.
3. 'Doping' a semiconductor means adding a small amount of other substances such as antimony or boron atoms to pure semiconductors to increase their conducting abilities.
4. So, when we add a little bit of boron to some silicon, the silicon is 'doped', and it can conduct electricity better than pure, unaltered silicon.
5. In this lesson, we are introduced to pentavalent atoms and trivalent atoms. What the hell are they?
6. A pentavalent atom is an atom that has five valence electrons. Example; phosphorus, antimony. A trivalent atom is an atom that has three valence electrons. Example; boron, gallium.
7. Semiconductors doped with penta atoms become n-type semiconductors. They have negative electrons as majority charge carriers.
8. If doped with tri atoms, they become p-type semiconductors. They have positive holes as majority charge carriers.
9. A diode is a device which allows current to flow through it it one direction only.
10. A semiconductor diode is basically a p-type and a n-type joined together.
11.Forward-biased= anode connected to positive terminal of battery, cathode negative. Reverse biased=vice versa.12. Special power; diodes can be used a.c into d.c. This is called rectification.
13. A capacitor fuctions to smoothen the current that is rectified (ac to dc) by discharging current when diode is reversed biased.
Haha its physics first after two century of regaining..
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