Cadmium zinc sulfide by solution growth

Details Cadmium zinc sulfide by solution growth Cadmium zinc sulfide by solution growth

1990-08-07

1992-05-12

Weisstuch, Aaron

Batteries: thermoelectric and photoelectric

Photoelectric

Cells

136265, 437 5, 428620, 427 74, 357 16, 357 30, H01L 31072, H01L 3118, H01L 310328

Patent

active

051124106

ABSTRACT:
A process for depositing thin layers of a II-VI compound cadmium zinc sulfide (CdZnS) by an aqueous solution growth technique with quality suitable for high efficiency photovoltaic or other devices which can benefit from the band edge shift resulting from the inclusion of Zn in the sulfide. A first solution comprising CdCl.sub.2 2.5H.sub.2 O, NH.sub.4 Cl, NH.sub.4 OH and ZnCl.sub.2, and a second solution comprising thiourea ((NH.sub.2).sub.2 CS) are combined and placed in a deposition cell, along with a substrate to form a thin i.e. 10 nm film of CdZnS on the substrate. This process can be sequentially repeated with to achieve deposition of independent multiple layers having different Zn concentrations.

REFERENCES:
patent: 4447335 (1984-05-01), Loeffler et al.
patent: 4523051 (1985-06-01), Mickelsen et al.
patent: 4611091 (1986-09-01), Choudary et al.
N. C. Sharma et al., Thin Solid Films, vol. 60, pp. 55-59, (1979).

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