Kroger-Vink Notation for Donor Doping

[dadon]

Hi All..

I'm having some trouble trying to understand the Kroger-Vink notation.. the following example is of donor doping (for semi conductor, extrinsic)..

the first equation is meant to be elecronic compenstaion while the bottom equation is ionic compensation

 

[Mapes]

The key with K-V notation is to simultaneously balance matter, charge, and sites. I believe the notation arose as a way to save space by tilting the typewriter platen and typing one or multiple periods, apostrophes, or xs. Why they couldn't just use the conventional, for example, "3-" or "4+" for charge I don't know.

 

[oswaler]

.. can anyone explain this to me?

Hello,

The Kroger-Vink notation is a way to represent the defect chemistry in a crystal lattice. In the context of donor doping, it is used to show the substitution of a foreign atom (donor) into the crystal lattice and how it affects the charge balance in the material.

In the first equation, the notation (A) represents a cation vacancy (missing atom) and (D+) represents a donor atom, which has donated an electron to the crystal lattice. This results in electronic compensation, as the positively charged donor atom balances out the negatively charged vacancy.

In the bottom equation, the notation (B) represents an anion vacancy and (D-) represents a donor atom, which has accepted an electron from the crystal lattice. This results in ionic compensation, as the negatively charged donor atom balances out the positively charged vacancy.

Overall, the Kroger-Vink notation helps us understand the defect chemistry and charge balance in doped materials, which is crucial for understanding their electronic and optical properties. I hope this helps clarify the concept for you. Let me know if you have any further questions.