Advertisements
Advertisements
Question
A perfect crystal of silicon (Figure) is doped with some elements as given in the options. Which of these options show n-type semiconductors?
Advertisements
Solution
Explanation:
When group 15 elements are doped into a perfect crystal, it leads to the formation of n-type semiconductor. Here, in as (group 15, period 3) is doped to perfect Si-crystal and in as (group 15, period 2) is doped to perfect Si-crystal.
APPEARS IN
RELATED QUESTIONS
p - type semi-conductors are made by mixing silicon with impurities of ______.
In a semiconductor, acceptor impurity is.................................
- antimony
- indium
- phosphorous
- arsenic
What type of semiconductor is obtained when silicon is doped with boron?
To prepare n-type semiconductor the impurity to be added to silicon should have the following number of valence electrons:
(a) 2
(b) 3
(c) 4
(d) 5
Give reasons : Silicon on doping with Phosphorous forms n-type semiconductor.
Distinguish between p-type and n-type semiconductors.
A group of 14 elements is converted into n-type semiconductor by doping it with:
Group 14 element is converted to p-type semiconductor by doping it with:
In n-type semiconductor, current is carried by ____________.
To get n-type of semiconductor, germanium should be doped with ____________.
Which of the following oxides behaves as conductor or insulator depending upon temperature?
Which of the following is true about the charge acquired by p-type semiconductors?
Under the influence of electric field, which of the following statements is true about the movement of electrons and holes in a p-type semiconductor?
(i) Electron will move towards the positvely charged plate through electron holes.
(ii) Holes will appear to be moving towards the negatively charged plate.
(iii) Both electrons and holes appear to move towards the positively charged plate.
(iv) Movement of electrons is not related to the movement of holes.
Explain why does conductivity of germanium crystals increase on doping with galium.
How does the doping increase the conductivity of semiconductors?
