Abstract
Copper tungstate (CuWO4) is a 2.3 eV bandgap semiconductor used in lithium batteries, sensors, and also in photoelectrochemical (PEC) and photocatalytic (PC) applications. Materials for PEC and PC application need to be optimised, for example in terms of electrical responses such as photocurrent and photovoltage. This optimization involves their surfaces and interfaces with the electrolyt…