Question

wt is the behaviour of sillicon and germanium?? insulators or semiconductors??

Answer 1

in this era silicon and germanium are used as semiconductors.in the higher temperature these two are good to carry current as the resistance of them minimize and a sufficient number of electrons become free which carry current.

Answer 2

if they are semiconductors why they are doped?

Answer 3

to increase their conductivity.

Answer 4

wts the initial behaviour before doping

Answer 5

before doping the number of the free electrons are not sufficient enough.after doping the distance between valance band and conduction band minimize.thus they can carry current of a satisfactory amount.

Answer 6

can we call it as a conductor after doping?

Answer 7

can we call it as a conductor after doping?

Answer 8

good question albertprasad

Answer 9

semiconductors

Answer 10

conductors can carry current of such amount which can not be compared with the amount carried by the doped silicon or germanium.so after doping also they are named semiconductors.the bulk of current carried by the conductors such as silver,copper can not be carried by the semiconductors though they are doped.

Answer 11

is there many particular name for the conductivity aftr doping?

Answer 12

no.i do not think that there is any special name for the doped semiconductors.

Answer 13

no.i am sure.there is no particular name.

Answer 14

isn't there p and n doping?

Answer 15

how much the conductivity after doping a semi conductor any relation or equation?

Answer 16

I am just guessing here but if you p dope silicon it wil have conductivity of phosphorous
and if you n dope it it will have conductivity of aluminum.

Answer 17

yes there is p and n doping.the materials which are used for doping separate this two type of doping. after p type of doping can silicon attain almost same conductivity of phosphorous?

Answer 18

i mean how much the conductivity increases after doping semi conductor

Answer 19

its by a huge factor

Answer 20

by the thousands maybe :P idk Its been like 3 years since i seen this stuff.

Answer 21

i am giving u a data which will try to help to understand the increment:before doping germanium carry current 10 micro ampere.bt after doping it can carry almost .0001 amp.

Answer 22

thank you all

Answer 23

http://electronics.howstuffworks.com/diode1.htm

Answer 24

they are semi conductors, they allow the flow of electric current under circumstances