a

Is extrinsic semiconductor electrically neutral or not ?

we will see which semiconductor is

ethically neutral will it be intrinsic

or n-type or p-type which out of this

one is electrically neutral generally

will think that intensity semiconductor

is electrically neutral n-type

semiconductor is electrically negative

detail to make enough is electrically

positive but that is wrong all the three

semiconductors that is intrinsic in take

and we take that means semiconductor

made to intensive erection see that is

electrically neutral so simply you can

say semiconductor is ethically neutral

irrespective of it whether it is

intensive or extensive now we will see

how so before going

first you will see a general Adam if you

are going for an atom

whether it is electrically neutral are

narcs

we don't have fun every atom is

electrically neutral because every atom

will be consisting of equal amount of

positive charge and equal amount of

negative charge so look at this one this

is a structure of the atom so that will

be consisting of nucleus and protons

along with electrons Neutron is going to

be neutral charged protons and electrons

are going to be charges electron is

consisting of negative charge proton is

a positive charge and electron charge is

charge of electron is minus 1 point 6

into 10 power minus 19 coulombs

whereas proton charge is less 1 point 6

into 10 power minus 19 coulombs only

magnitude is going to be change but the

charge is same so since every atom

consisting of equal amount of electrons

and equal amount of protons the atom is

electrically neutral so very important

statement is every atom every atom is

electrical mean

since every atom is electrically neutral

you can show some examples also so

silicon germanium which are going to be

examples of semiconductor and

phosphorous arsenic antimony

so these are examples of pentavalent

impurities and some other examples of

aluminium boron gallium indium these are

examples of prevalent impurities

examples of tribal and impurities

examples of unraveling impurities and

these are semiconductors simply so

whatever it is they are going to be

treated as atoms so every atom is

electrically neutral now consider

intrinsic semiconductor case in

intrinsic semiconductor intrinsic

semiconductor is also called as pure

semiconductor so pure means it will

consisting of atoms of our identical

nature so for example blue semiconductor

elements for example if you are taking

silicon crystal silicon crystal is

intrinsic semiconductor germanium

crystal is also intrinsic semiconductor

carbon crystal so a crystal means it

will be wisdom is having a structure

which is having a crystal is having a

unit structure which is replicating

regularly and silicon crystal will only

consisting of silicon atoms and every

silicon atom is electrically neutral

may it be consisting of any number of

silicon atoms okay so the total charge

is going to be neutral so in turn six

Emmy conductor is electrically neutral

remember that one

okay intrinsic semiconductor that means

a semiconductor which consisting of all

identical atoms that may be for example

silicon crystal germanium crystal are

Harbin crystal like this so every atom

is electrically neutral and even though

if you are adding okay infinite number

of atoms but which is having a neutral

charge so the total is going to be

neutral so intensive semiconductor is

electrically neutral

now comfort n-type semiconductor

n-type semiconductor is added when in

10600 and types of make a necklace form

then pentavalent impurity is added to

intrinsic semiconductor so

and turbulent impurity if you add then

if you add it to intrinsic semiconductor

what it results is n-type semiconductor

and travel impurities are nothing but

examples phosphorus arsenic antimony

these are the best examples of

pentavalent impurities which has five

valence electrons in its outermost orbit

but they are also neutral every atom is

neutral so that whether it is phosphorus

or arsenic or antimony whatever you are

adding contaminant that is also

different in ten six my conductor is

also neutral when tower and cotton is

also Newton so neutral place Newton what

you are going to get is new parents in

next p-type semiconductor is also in the

same way

he takes a mechanic's face form when

trivalent impurity is added to violent

impurity is added to intensive

semiconductor that is pure semiconductor

it is already neutral trivalent impurity

that is nothing but prevalent patterns

with maybe aluminum boron valium Indian

they are all neutral in nature so the

trivalent impurity is also neutral pure

semiconductor is also neutral so finally

Neutron plus neutral is neutral so we

can say every semiconductor we can say

you have pre semiconductor whether it is

intensive are extensive is electrically

neutral electrically neutral you may be

thinking that it will be having n-type

semiconductor is having electrons as

majority charge carriers than holes okay

then you can think electrons are more so

that it is going to be negatively

charged but it is not like this so

remember it every semiconductor is

electrically neutral because even though

n-type semiconductor if you are

consisting of majority carriers are

going to be electrons electrons are

going to blow that in holes bliss holes

let's positive ions

so the total charge is going to be

electrons number of electrons is equal

to number of holes present in the front

let's positive ions created because of

pentavalent atoms this will be having

equal number so that when you are going

with completely so total negative charge

is equal to total voltage charge that

makes n type semiconductor as

electrically neutral

similarly for P type also holes are

majority carriers holes are more but

some total number of holes is equal to

electrons present in reading less

negative ions okay every travel and atom

when it gains an electron it becomes

negative ion by the time that is a

vacancy created that is called as phone

so because of this nature p-type is

electrically neutral and because of this

one and type is electrically neutral so

finally the conclusion is every

semiconductor is electrically neutral