Electrochemical intercalation of O2− in CuAlO2 single crystal and photoelectrochemical properties

Nanoporous Delafossite CuAlO2from Inorganic/Polymer Double Gels: A Desirable High-Surface-Area p-Type Transparent Electrode Material

“…This value is in excellent agreement with the literature, although the previous measurements were carried out using different techniques such as photoelectron spectroscopy in air, 53 photocurrent−potential, or potentiodynamic measurements. 54,55 In addition, the charge-carrier density (N C ) was estimated from the slope in the Mott−Schottky plot. After the value was corrected with the measured open porosity of the pelleted sample by following the literature, 56,57 the calculated value was 3 × 10 19 cm −3 , which is notably high and, in fact, represents one of the best values obtained for CuAlO 2 , 16,58 indicating the excellent electrical properties of nanoporous CuAlO 2 .…”

Facilitating hole transfer on electrochemically synthesized p-type CuAlO2 films for efficient solar hydrogen production from water

“…4a). This E g value was attributed to the indirectly allowed transition of CuAlO 2 (1.2-1.7 eV), 23,40,41 whereas the directly allowed transition usually leads to large E g values of 3-3.5 eV. 24,27 The indirect transition-induced photogeneration of charge carriers was conrmed by the IPCE proles (Fig.…”

Effects of chalcogen substitution on electronic properties and chemical bondings of delafossite CuAlO2

“…Since the p‐type transparent conducting oxide (TCO) of delafossite CuAlO 2 films was reported , there is a constant search for the low‐resistive p‐type TCOs. This is due to the fact that their conductivity is significantly lower than that of common n‐type TCOs, which seriously limits their practical applications such as optoelectronic devices , multifunctional materials , solar cells . However, what causes such poor p‐type conductivity?…”