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Why is phosphours doped silicon a semi-c...

Why is phosphours doped silicon a semi-conductor?

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Phosphorus is pentavalent and silicon is tetravalent. Silicon doped with phosphours results in the foumation of p-type semi-conductor. They leads to increase in its electrical conductivity.
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DINESH PUBLICATION-SOLID STATE-QUESTION FROM BOARD EXAMINATION
  1. How does the density of crystal change due to Schottky defects ?

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  2. What is the number of atoms per unit cell in a body centred cubic stru...

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  3. Why is phosphours doped silicon a semi-conductor?

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  4. Name the type of defect that occurs in the crystals of zinc sulphide.

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  5. How may octahedral voids are present in 1 mole of a compound having cu...

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  6. A compound formed by two elements M and N. Element N forms ccp and ato...

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  7. What is the total number of atoms per unit cell in a face centred cubi...

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  8. What type of substances exhibit antiferromagnetism ?

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  9. Why Frenkel defects are not found in pure alkali metal halides?

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  10. What types of allignments in crystals make them ferromagnetic ?

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  11. To get a n- type semiconductor from silicon , it should be doped...

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  12. Which point defect in crystals does not alter the density of the relev...

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  14. What type of interactions hold together the molecules in a polar cryst...

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  15. Write a distinguishing feature of metallic solids.

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  16. What type of semiconductor results when highly purified silicon is dop...

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  17. Crystalline solids are anisotropc in nature. What does this statement ...

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  18. Distinguish between intrinsic and extrinsic semi-conductors on the bas...

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  19. What are semi-conductors ? Describe the two main types of semi- conduc...

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