Deposition of CdS and ZnS from aqueous solutions by a new photochemical technique

Photochemical deposition (PCD), a novel deposition technique of compound semiconductors from an aqueous solution, was developed. A substrate was held in an aqueous solution containing S 2O 3 2− and metal ions, and was irradiated with a mercury lamp. Then, a sulfide (CdS and ZnS) film was deposited i...

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Bibliographic Details
Published inJournal of crystal growth Vol. 198; pp. 308 - 312
Main Authors Ichimura, Masaya, Goto, Fumitaka, Ono, Yuhei, Arai, Eisuke
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.03.1999
Subjects
Aqueous solution
Compound semiconductor
Photochemical deposition
Sulfide
Sulfide
82.50
Photochemical deposition
Compound semiconductor
81.15.T
81.05.D
Aqueous solution
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Summary:Photochemical deposition (PCD), a novel deposition technique of compound semiconductors from an aqueous solution, was developed. A substrate was held in an aqueous solution containing S 2O 3 2− and metal ions, and was irradiated with a mercury lamp. Then, a sulfide (CdS and ZnS) film was deposited in the irradiated region of the substrate. The deposited CdS films have an orange–yellow color and an optical absorption edge near 500 nm. The composition is almost stoichiometric for a wide range of pH values of the solution (3.5–8). ZnS was also deposited by PCD, but the composition is Zn-rich. Nearly stoichiometric films were obtained after annealing at 500°C.
ISSN:0022-0248
1873-5002
DOI:10.1016/S0022-0248(98)00985-3