Abstract
Transparent conducting electrodes using Neodymium sulphide and Lanthanum sulphide composites for photoelectrochemical cells were prepared. Composite Nd2S3:LaS2 comprised a 57.3 nm crystallite size and elongated with clump-like bodies. Core levels of La3d, Nd4d and S2p were identified through X-ray photoelectron spectroscopy. Tauc's plot helped in determining an optical band gap of 3.7 eV in the composite. Various electrochemical investigated were done for the electrode in a photoelectrochemical cell. An impressive value for specific capacitance of 359 F g-1 was obtained by cyclic voltammetry at 5 mVs−1 in the presence of light as opposed to 299 F g-1 in its absence. Transient chronoamperometry also presented an astounding photocurrent density of 17.3 mA under illumination. Nyquist plot obtained from electrical impedance spectroscopy revealed an Rs at 24.8 Ω with a conductivity of 3.54x10−5 Scm−1 for the cell. Therefore, this study presented a remarkable photoactive-electrode useable in systems for renewable energy storage and generation. The cell performance may be further evaluated at different operational features such as temperature, humidity etc to mimic the real world.
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