Process for forming zinc oxide film and processes for producing

Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Forming nonmetal coating

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205206, 205210, 205199, 205200, 205201, 205164, 205167, 4274301, 427435, 427322, 427328, 427307, 427436, 427316, 427318, 427319, C25D 900, C25D 534, C23D 2800, B05D 118, B05D 312

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061066893

ABSTRACT:
A process for forming a zinc oxide film including immersing an electroconductive substrate having a surface including a plurality of linear projections in an aqueous solution containing at least nitrate ions and zinc ions to form a zinc oxide film on the electroconductive substrate by a liquid-phase deposition. The plurality of linear projections may preferably provide an uneven surface which has a center-line average surface roughness Ra(X) of 15-300 nm when scanned in a direction parallel to the linear projections, a center line average surface roughness Ra(Y) of 20-600 nm when scanned in a direction perpendicular to the linear projections, and an Ra(X)/Ra(Y) ratio of at most 0.8. The thus formed zinc oxide film is provided with an uneven surface suitable for an optical-confinement layer of a photo-electricity generating device excellent in photoelectric performances.

REFERENCES:
patent: 5800632 (1998-09-01), Arao et al.
Inoue, Y., et al. "Optical Confinement Effect in a-SiGe Solar Cells on Stainless Steel Substrates," Preprint (29p-MF-2) for the 51-th Academic Lecture of The Japan Society of Applied Physics, p. 747, Autumn, 1990. No month available.
Sannomiya, H., et al., "a-SiC/a-Si/a-SiGe Multi-Bandgap Stacked Solar Cells with Bandgap Profiling," Technical Digest of the International, PVSEC-5, Kyoto, Japan, p. 381, 1990. No month available.
Izaki, Masanobu, et al., "Electrolyte Optimization for Cathodic Growth of Zinc Oxide Films," J. Electrochem Society, Inc., vol. 143, Mar. 1996, L53.

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