Fig. 1: Principle of MIR light enhanced proton conductivity through excitation of O–H vibration.
From: Mid-infrared light resonance-enhanced proton conductivity in ceramics
a Upon resonant MIR excitation with the energy of hνO–H, the O–H stretch amplitude is increased to facilitate proton transfer. b MIR light excites the O–H stretch vibration from the ground state to an excited state. c Schematics of the corresponding EIS spectra with (red) and without (blue) MIR irradiation. Inset: photo of a 0.4-mm thick protonated polycrystalline BZY pellet. In (a) the purple, red and orange spheres represent B-site (Zr or Y), O and H atoms respectively, while the light blue squares denote BO6 (B = Zr, Y) octahedra.
