- The Story Of Electro And A Dream Of Passing The Pn Junction Read The Story And Fill In The Spaces Once Upon A Time I 1 (91.81 KiB) Viewed 9 times
Electromany..when will be a free Electron? Phosphorus mamy : when you will have sufficient.......... To jump from the ...... band to the....... Band Electro: how can I get that energy? Mamy: But when the temperature increases to about 170 Kevin. Electro and his friends become When the temperature gets to the room temperature, generation of the ....pairs happened in the Partial Complete ionization ionization Extrinsic Region Intrinsic Regida 1 Freeze-Out Region 6,2 100 200 300 400 500 600 One day, the n type silicon was joined with a p type silicon to form a Electro "scarred": where are all these electrons going? DH Electron Hole P
Mamy: they are moving to the because of the ...... process. Electro:why do they leave their home, and what happens to the many atoms. Many: because the concentration of the electrons is.......... In the n region than the p region the electrons And as they leave their atoms they become a Electro: many.. What are these strange positive carriers that are coming from the p region? Mamy these are the....... And they move from the p region because of the........ since the concentration of the holes in the p region is...... , as they move to our side they leave P N Depletion Region Suddenly The one entered stopped and All the electrons felt a great force preventing them from moving to the This was the Electro : what is this poor land over there it is empty of charge carriers. What I'd that mountain that stand in front of me Conduction hand Valence hand 0- pregion region w junction and depletion
Mamy : And it's width is related to .... And the mountain I the And its height is Electrons watched that great and dreamed about cutting that depletion region land to visit the region Mamy: but you will be a ...... carrier in the p region while here you are between you friends and family and you are a ....... Carrier. Electro : but I feel that is my destiny. Some time passed and the barrier in front of Electro increased. Electro : many, help the barrier is higher and I can see some holes being ...... by the electric field away to the p region. ++ 13 V 1-3 b) Revente Bias aOpen-circuit (Equilibrium (c) Forwa Bias Mamy: calm down, it is just the..... bias . An external voltage was applied to our pn junction; they connect our side to Terminal and the p side to This causes the electric field to and the electron to move to the p region, but at the same time it can drift the impurities............. to...... so the only current in the junction right now is.... Gradually the barrier starts to decrease and the electrons start to and a current starts to pass because of the....... Carrier movement Mamy: hurry up Electro, go and fulfill your dream and I will wait here if you make it through the whole circuit. Electro moved fast with the majority Carrier current, entering the trying to move to pregion
p-n junction + n-type semiconductor p-type semiconductor Current flows He was careful not to meet with a hole and and get lost. Finally he reached the boundary of the p type and entered the p type region as one of the minority carriers whose concentration at the boundary is ..... But it was scary because the low concent of ......minority carriers are surrounded by a high concentration of ...... majority carriers. Electro starts to diffuse Inside the p region knowing that he will..... eventually with a hole , but he is happy to spend his .......... In this adventure, . -P
Its lifetime is given as ... and after this time the concentration of the minority free carriers will go back to ..... Because at the end they are