Hetero-valent cations-doped zinc stannate nanoparticles for optoelectronic and dielectric applications

N‐Doped ZnSnO Optoelectronic Synaptic Thin Film Transistors with Enhanced Visible‐Light Response

“…To evaluate the surface chemical composition and electronic states, X‐ray photoelectron spectroscopy (XPS) analysis is carried on the film bulk. Figure a,b illustrate the O1 s spectrum of ZnSnO and ZnSnO:N, respectively, which can be deconvoluted into three binding peaks through Gaussian–Lorenz fitting method: one peak centered at 530.6 eV associated with metal‐oxygen bonds within the lattice; [ 18 ] a medium component at 531.2 eV derived from oxygen vacancies; [ 19 ] and a higher binding energy value of related to loosely bonded oxygen on the film surface, including absorbed H 2 O, CO 2 , or O 2 from the external ambient. [ 20 ] The results demonstrate a rise in metal‐oxygen bonding from 67.35% for ZnSnO films to 77.15% for ZnSnO:N films, signifying that N doping enhances the regularity of the films.…”