Electrodeposition of ZnO/Cu2O Heterojunctions on Ni-Mo-P Electroless Coating

Abstract

Electroless Ni-Mo-P coatings were deposited onto ceramic tiles in order to be employed as electrodes for the electrodeposition of ZnO and Cu2O heterojunction layers. Varying conditions, such as duration, annealing of the electroless coating and applied potential, and duration for ZnO electrodeposition were studied in order to optimize the properties of the ZnO/Cu2O heterojunctions toward improved photoelectrical performance. The coatings were evaluated in terms of morphology, crystalline structure, and by electrochemical and photoelectrical means. The obtained results indicated that a prolonged annealing treatment at low temperature is beneficial to improve the roughness and electrical conductivity of the Ni-Mo-P coating to further enhance the electrodeposition of ZnO. The morphology analysis revealed continuous and homogeneous Ni-Mo-P coatings. The formation of cube-like Cu2O crystals with larger grain size was induced by increasing the deposition duration of ZnO. The properties of ZnO layer are much improved when a higher cathodic potential is applied (−0.8 V) for 1 h, resulting in optimum photoelectric parameters as 1.44 mA·cm−2 for the JSC and 760.23 µV for the VOC value, respectively, for the corresponding heterojunction solar cell.

Structural, Optical, and Electrical Properties of Copper Oxide Films Grown by the SILAR Method with Post-Annealing

“…In addition, CuO and Cu 2 O have been widely studied in similar applications such as photocatalysts [2,3], gas sensors [4,5], photodetectors [6,7], solar cells [8,9], batteries [10,11], supercapacitors [12,13], and so forth. A variety of techniques including sputtering [9,14], evaporation [15,16], thermal oxidation [17,18], sol-gel [19,20], spray pyrolysis [21,22], electrodeposition [23,24], and successive ionic layer adsorption and reaction (SILAR) method [25][26][27][28][29][30] have been employed to synthesize copper oxide films.…”

Influence of Particle Concentration on the Elemental Penetration Region and Properties of Ni-P-SiC Composite Coatings Prepared through Sandblasting and Scanning Electrodeposition on 45 Steel Surfaces

“…This simple, efficient, and low-cost process uses compressed air to form a high-speed jet beam to spray sand particles at high speed onto the substrate surface to deform it plastically, thereby enhancing the mechanical properties and accelerating the deposition rate of the coating [20][21][22][23][24]. Most studies on electrodeposited composite coatings focused on surface characterization and performance testing such as the influence of microscopic morphology [25,26], grain structure [27,28], and element distribution [29,30] on corrosion resistance. Research on sections is only limited to the coating thickness and cross-sectional microstructure [31][32][33]; the interplay among coating morphology, element distribution, adhesion performance, and corrosion resistance is poorly examined.…”