Electrodeposited and characterization of Cu-Cd-Se semiconductor thin films

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• 作者：Ibtissem Ben Assaker ; Halima Elbedoui ; Radhouane Chtourou
• 关键词：Cu&ndash ; Cd&ndash ; Se ; Electrodeposition ; Cyclic voltammetry ; Thin film
• 刊名：Electrochimica Acta
• 出版年：2012
• 出版时间：30 October, 2012
• 年：2012
• 卷：81
• 期：Complete
• 页码：149-154
• 全文大小：1016 K

文摘

Thin films of Cadmium Copper Selenides (Cd-Cu-Se) have been deposited on tin oxide coated conducting glass (SnO₂) substrates using potentiostatic cathodic electrodeposition technique. Furthermore, a cyclic voltammetry study was performed in a unitary Cu, Cd, Se, binary Cu-Se, Cd-Se and ternary Cu-Cd-Se systems. A potassium chloride electrolyte containing selenium oxide (SeO₂) and uncomplexed Cu²⁺ and Cd²⁺ ions is used in all the cases. The growth kinetics of the ternary system is monitored by cyclic voltammetric measurements. The composition and structure are analyzed by XRD. The X-ray diffraction shows that the natures of the film depend to the cathode potential applied. This result was confirmed by SEM and atomic absorption spectroscopy (AAS) which demonstrated the complete change of morphology and composition with the deposition potential. The optical band gaps are evaluated from optical absorption measurements. The experimental observations are discussed in detail.