Table 2. Formation Energies (E_FORM, eV) of the Oxygen Vacancy (O_V) Close (O_VC) and Far (O_VF) from the Substitutional and Interstitial N-Doped Sites Compared with the E_FORM of the O_V in the Undoped System.

EFORM (eV)	OVC	OVF
ZnO(100)–ATiO2(101)	2.16	2.46
N(101)3	1.79	2.32
N(101)1*	2.51	3.62
N(101)3–N(101)	1.05	1.71
N(101)1*–N(101)	1.80	2.52
N(101)3–N(101)	1.45	2.64