barrier potential

Thread Starter

sanjayladwa

Joined Oct 26, 2006
5
we know that due to diffusion current their exists a electric field and hence barrier potential.but when voltmeter is applied it reads zero it means that their exists some force which this zero.May I know which force this may be? If we say no then it violates law of conservation of energy
 

thingmaker3

Joined May 16, 2005
5,084
Drift current implies an electric field. Diffusion current does not. Diffusion current is sort of like Brownian motion for charge carriers. Sort of.
 

Thread Starter

sanjayladwa

Joined Oct 26, 2006
5
but during fabrication due diffusion of charge carriers their forms a uncovered ions which result in electric field. not nesserially due drift current
 
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