Emission Mechanisms of Si Nanocrystals and Defects in SiO2 Materials
Figure 17
Paramagnetic point defects in SiO2. (a) The center [54ā56], (b) twofold coordinated silicon [53], (c) nonbridging oxygen hole center (NBOHC) [55], (d) the neutral oxygen vacancy, and (e) peroxy radical [53, 56]. All of these are well-known centers related to the emission of light in quartz [57].