Fundamental properties of delafossite CuFeO2 as photocatalyst for solar energy conversion

Influence of substrate temperature on delafossite CuFeO2 films synthesized by reactive magnetron sputtering

“…In this range, the absorption coefficient increases up to 10 5 cm -1 for the films deposited at 380 and 440 °C and becomes even larger for higher deposited temperatures. The strong optical absorption at < 800 nm is consistent with previous article [4], in which the authors observed similarly strong absorption, while it started at 1000 nm. It was ascribed to the direct transition O-pz Fe-dxz, -dz2 at 1.55 eV (O-2p Fe-3d) with the possible contribution of the indirect transition O-px, -py Fedxy, -dxz, -dyz, -dx2-y2, -dz2 at 1.54 eV.…”

“…Other references experimentally showed by spectrometry and photoconductivity presence of both transitions [4][33]. The 2 nd transition could be ascribed to O-px, -py Cu-dz2 (O-2p Cu-3d) and O-px, -py Fe-dxy, -dxz, -dyz, -dx2-y2, -dz2 (O-2p Fe-3d) at 1.92 eV [4]. Furthermore, it is noteworthy that, with the deposition temperature elevation, the amplitude ratios of the 1 st transition over the 2 nd transition determined from "OJL" model increase (x 3.5 at 380 °C to x 9.5 at 510 °C).…”

“…Theoretical investigations on CuMO2 compounds (with M = IIIA, 3d, 4d, 5d, and rare earth elements) have highlighted the functions of the different substructures in the mechanisms of light absorption, charges separation and transport demonstrating that CuFeO2 is suitable for solar applications such as photovoltaic [10]. Some authors have also studied its thermoelectric [9][11] [12] and its photocatalytic properties [4] [13] [14].…”

Self-assembly of Au/MoS2 quantum dots core-satellite hybrid as efficient electrocatalyst for hydrogen production

“…With the rapid increase of population and continuous development of society, the two major problems of environmental pollution and energy shortage affect all aspects human beings [1,2]. Hence, it is very urgent to develop efficient, clean and sustainable energy.…”

Rational Design of a Two-Dimensional Janus CuFeO2+ Single Layer as a Photocatalyst and Photoelectrode

“…nanosheet and CuFeO 2+δ 2D Janus Layer. For the Raman spectrum, in addition to the features analyzed in our previous reports, [1][2] the most prominent feature is that the diffraction peak of the CuFeO 2+δ 2D Janus Layer sample is significantly broadened compared to the other two samples. This is due to the introduction of a certain amount of 2D The Fe-2p peaks of these three samples are seen to match Fe 3+ , 3 which indicates that the chemical coordination environment around Fe atoms has not changed significantly, which is consistent with our previous reports.…”