Electrodeposition method for controlled formation of CdS films from aqueous solutions

• Published in: Journal of electroanalytical chemistry (1992) Vol. 473; no. 1; pp. 217 - 222
• Main Authors: Nishino, Junichi, Chatani, Sunao, Uotani, Yukifumi, Nosaka, Yoshio
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 08.09.1999; Elsevier Science
• Subjects: a-Axis orientation; CdS; Chemistry; Electrochemistry; Electrodeposition; Exact sciences and technology; General and physical chemistry; Rectangular wave voltage; Study of interfaces; Electrodeposition; CdS; Rectangular wave voltage; a-Axis orientation; Film; Scanning electron microscopy; Crystal orientation; Transition metal Compounds; Electrode electrolyte interface; Kinetics; Cadmium sulfide; Experimental study; X ray diffraction; Surface structure
• ISSN: 1572-6657; 1873-2569
• DOI: 10.1016/S0022-0728(99)00250-8

Polycrystalline CdS films of good quality could be obtained by electrolysis with rectangular voltages on indium tin oxide/glass substrates from low concentration of CdSO 4 and Na 2S 2O 3 in aqueous solution system of pH 3.1 at room temperature (r.t.). The films obtained during 6 s at −1.0 V (versus Ag ∣ AgCl ∣ 3 M NaCl) and 6 s at 0.0 V gave stoichiometric CdS with a hexagonal polycrystalline structure with a preferred a-axis orientation. It is suggested that the mass transfer of Cd 2+ to the substrate surface governs the deposition rate of CdS. The film deposited at 6 s of −1.2 V and 6 s of 0.0 V gave a c-axis preferred orientation. Incorporation of S into the films was affected by the applied potential, and the reduction of S controls the deposition reaction.