Radii of host and dppant

Oct 2018
21
0
Pakistan
Should radii of host and dopant elements be the same for dopping reaction? What will be its effect on reaction for same radii and for different radii?
 
Jun 2016
1,189
555
England
You want the dopant to fit nicely into the crystal structure of the host material,
thus you want the radii to be as similar as possible.
 

topsquark

Forum Staff
Apr 2008
2,972
629
On the dance floor, baby!
You want the dopant to fit nicely into the crystal structure of the host material,
thus you want the radii to be as similar as possible.
I suck at SSP but I do remember one thing: Normally the radius of the dopant has to be somewhat close to the host atom that you are replacing, as you say. But there can be advantages in using a dopant that does not do this. As I recall you can sometimes construct a piezo-electric structure by introducing a dopant that has a much larger radius than the host element.

But that's pretty much all I know about it.

-Dan
 
Similar Physics Discussions Physics Forum Date
Philosophy of Physics