Fig. 2: Facilitated ionization in ferroelectric barrier discharge.
From: Enhanced production of active species and NH3 using non-equilibrium ferroelectric barrier discharge
OES spectra of FBD and Al2O3 DBD showing (a) nitrogen-related species and (b) hydrogen-related species. Note that panels (a) and (b) use different intensity scales (with b enlarged for clarity), while spectra within each panel share the same scale for vertical comparison. The FBD consistently exhibits higher emission intensities compared to the Al2O3 DBD, particularly for excited molecules and radicals. More importantly, the ionization processes in FBD are significantly enhanced, leading to a greater presence of ionized species, such as N2+*, which are key intermediates in plasma-assisted reactions. This enhancement is attributed to the large electric field present in the ferroelectric barrier discharge, facilitating ionization and promoting a higher density of reactive ions.
