912903.fig.004a
(a)
912903.fig.004b
(b)
912903.fig.004c
(c)
Figure 4: Energy-level diagram for an undoped or B-doped SiNC. B in the B configurations shown in (a) is all three-coordinated. Except for BH(γ and δ), B in the B configurations shown in (b) and (c) is all four-coordinated. Filled (empty) circles indicate that B-induced defect energy levels are occupied (unoccupied) by electrons. When B is four-coordinated, spin split occurs to the B-induced defect energy levels. (Reprinted from [37] copyright 2011 American Chemical Society.)