Electrodeposition of ternary CuAgSe thin films

Growth and Transformation Mechanism of Ternary CuAgSe Dendrites from Binary Ag2Se Dendrites

“…This result supports the electrochemical behavior described by Neshkova [15] and indicates that both the monoclinic Cu 2 Se phase and orthorhombic Ag 2 Se phase can be adopted for the growth of the orthorhombic CuAgSe phase. From a structural perspective, it is worth noting that ternary CuAgSe can be represented formally as 1/2[Ag 2 Se]· 1/2[Cu 2 Se].…”

“…[18] A detailed electrochemical study of CuAgSe electrodeposition by Neshkova revealed that the admixture of Cu 2 Se and Ag 2 Se can immediately transform structurally into the ternary CuAgSe phase obeying a 1:1:1 molar ratio at room temperature. [15] Therefore, the transformation process from the Ag 2 Se phase to the CuAgSe phase can start with the following reaction; see Equations (1) and (2). In our experiments, a trace amount of Se powder and an excess of Cu nanoparticles were used to ensure the formation of the pure Cu 2 Se phase on the surface of the dendritic Ag 2 Se reagents.…”

“…The reaction design adopts the electrochemical behavior of the admixture of Cu 2 Se and Ag 2 Se that immediately transforms structurally into the ternary CuAgSe phase at room temperature. [15] In our experiment, the dendritic Ag 2 Se/Ag was first immersed in a Se powder suspension in water to adsorb Se powders on the surface of Ag 2 Se dendrites (Se-Ag 2 Se/Ag). In the second step, the Se-Ag 2 Se/Ag foil was immersed in a freshly prepared Cu nanoparticle suspension in an aqueous ammonia solution.…”

“…[17] In this paper, we report the design of a new nano approach to grow ternary CuAgSe dendrites at room temperature by inheriting the initial dendritic structures of Ag 2 Se reagents, and Cu nanoparticles and Se powders are used to feed the growth in aqueous ammonia solution. The reaction design adopts the electrochemical behavior studied by Neshkova et al [15] that the ternary CuAgSe phase appears at potentials close to or coincident with those that lead to the deposition of binary compounds, Ag 2 Se and Cu 2 Se. Thus, it is believed that both Ag 2 Se and Cu 2 Se are prerequisites for CuAgSe growth at room temperature.…”

“…[12,13] The present interest in the synthesis of CuAgSe has been provoked by the report that a CuAgSe polycrystalline membrane has been commercialized for Cu 2+ ion-selective electrodes with a lifetime as long as ten years. [14] Recently, CuAgSe films have been electrochemically synthesized by a technique for electrochemical atomic layer epitaxy deposition for chalcogenides [15,16] first proposed by Stickney. [17] In this paper, we report the design of a new nano approach to grow ternary CuAgSe dendrites at room temperature by inheriting the initial dendritic structures of Ag 2 Se reagents, and Cu nanoparticles and Se powders are used to feed the growth in aqueous ammonia solution.…”