Shape‐Controlled NaTaO₃ by Flux‐Mediated Synthesis

Abstract

NaTaO 3 is a stable and wide bandgap n-type semiconductor material with many different applications. Here, a flux-mediated synthesis method is presented for NaTaO 3 resulting in highly distinctive, substrate covering shapes via precursor chemistry variation at comparatively low temperatures. It is found that the microstructure of the resulting NaTaO 3 films can be varied from nanocubes to smooth thin films. These shapes and surface chemistries can be correlated by employing density functional theory calculations and surface sensitive X-ray photoemission spectroscopy. This study provides guidance on how to synthesize the material and tailor its shape and surface termination for different applications. Finally, as a proof of concept of one possible application, NaTaO 3 is applied to perovskite solar cells as the electron transport layer, resulting in conversion efficiencies of >19%. This study provides a new strategy for designing ternary oxide thin films for renewable energy applications.

A Phase Engineering Strategy of Perovskite‐Type ZnSnO3:Nd for Boosting the Sonodynamic Therapy Performance

“…[8] Compared with mono-metal oxides, perovskite-type transition metal oxides have the advantages of richer redox reactions, higher electrochemical activity, and stronger electrical conductivity. [9] The strength of the MO bond in the structure of ZnSnO 3 is different from that of mono-metal oxides. The relative energy difference between the 3d orbital of the B-site cation and the 2p orbital of the O-anion plays a crucial role in promoting the charge transfer between the [BO 3…”