Batteries: thermoelectric and photoelectric – Photoelectric – Cells
Patent
1997-09-04
1999-11-16
Diamond, Alan
Batteries: thermoelectric and photoelectric
Photoelectric
Cells
136243, 136261, 136262, 136264, 136260, 136265, 428687, 428620, 438 84, 438 86, 438 96, 438 97, 438 57, 438 61, 148608, 148609, 723652, 723796, H01L 310236, C23G 119
Patent
active
059862050
ABSTRACT:
The stainless steel sheet useful as a substrate for non-single crystalline semiconductor solar cells has minute ripples with undulations along a rolling direction, and its surface roughness is controlled in the range of R.sub.z 0.3-1.4 .mu.m and R.sub.max 0.5-1.7 .mu.m. It is manufactured by finish cold rolling a stainless steel strip with a reduction ratio of at least 20% at a rolling speed of at least 400 m/min. using work rolls polished with abrasives of gage #100-#400 at a final pass, annealing the rolled strip in an open-air atmosphere and then electrolytically pickling the annealed strip in a nitric acid solution. Since minute ripples with undulations are formed on the surface of the stainless steel sheet, an energy conversion efficiency is increased by acceleration of scattering and multiple reflection of incident light rays projected into a non-single crystalline semiconductor layer.
REFERENCES:
patent: 4775599 (1988-10-01), Matsuoka et al.
Matsune Hisashi
Nishimura Yasushi
Okiyama Takuji
Sano Masafumi
Canon Kabushiki Kaisha
Diamond Alan
Nisshin Steel Co. Ltd.
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