1. A solar cell comprising a pair of substrates which each has at least two insulatedly divided transparent electrically-conductive film layer regions and at least one semiconductor layer placed partially and stackingly on at least one of the transparent electrically-conductive film layer regions, wherein a transparent electrically-conductive film layer and a semiconductor layer, that are positioned on the same transparent electrically-conductive film layer region placed on one substrate, are respectively positioned so as to be opposed to a semiconductor layer positioned on a transparent electrically-conductor layer region on the other substrate and another transparent electrically-conductive film layer positioned on another transparent electrically-conductive film layer region placed on the other substrate.
2. The solar cell of claim 1, wherein said substrate is a transparent substrate.
3. The solar cell of claim 1 or 2, which receives light from both outer surfaces of the substrates.
4. The solar cell of claim 1, 2 or 3, wherein an electrically conductive layer is overlaid over said transparent electrically-conductive film layer opposite to said semiconductor layer.
5. The solar cell of claim 4, wherein said electroconductive layer is of which comprises one or more members selected from the group consisting of carbon, graphite, carbon nanotube, platinum, gold, silver, titanium, vanadium, chrome, zirconium, niobium, molybdenum, palladium, tantalum, tungsten, alloys thereof, and electrically conductive plastics.
6. The solar cell of any one of claims 1 to 5, wherein said semiconductor layer contains a photosensitizing dye andor a binder.
7. The solar cell of any one of claims 1 to 6, wherein a gapspace formed between a pair of substrates positioned oppositely is not partitioned.
8. The solar cell of any one of claims 1 to 7, wherein the gapsspaces, which are respectively formed between a pair of substrates positioned oppositely, are partitioned in a unit of a pair of said transparent electrically-conductive film layer and said semiconductor layer to form a solar cell comprising at least one unit of solar cell.
9. The solar cell of claim 8, which comprises at least two solar cell units are cascaded in series or in parallel.
10. The solar cell of claim 9, wherein said solar cell units are respectively composed of at least two wavelength division cells cascaded in series or in parallel.
11. The solar cell of any one of claims 1 to 10, which further contains a liquid electrolyte andor solid electrolytic material as an electrolyte layer.
12. The solar cell of any one of claims 1 to 11, wherein a plural transparent electrically-conductive film layer regions, which are partially overlaid with said semiconductor layers, are positioned in line.
13. The solar cell of any one of claims 1 to 12, which is further installed with a battery means andor a d.c.a.c. converting means.
14. The solar cell of any one of claims 1 to 13, which is further installed with a means for chasing the movement of the sun in the daytime.
15. A power supplying device, which comprises said solar cell of any one of claims 1 to 14 as a power generating means.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A polypropylene resin composition for non-stretched film, comprising
(A) 50-95 parts by weight of a polypropylene resin,
(B) 3-40 parts by weight of an ethylene-olefin random copolymer with the -olefin having at least three carbon atoms, the said random copolymer having a content of the structural unit of ethylene of 60-95 mole %, a density of 0.900 gcm3 or lower, an MFR (melt flow rate, determined according to ASTM D-1238 at 190 C. under a load of 2.16 kg) of 0.1-50 g10 min. and a molecular weight distribution expressed by MwMn, determined by gel permeation chromatography (GPC), of 3 or less, and
(C) 2-20 parts by weight of a propyleneethylene 1-butene random copolymer, which meets the three conditions 1), 2) and 3) given below,
wherein the amounts of (A), (B) and (C) sum up to 100 parts by weight and wherein the said random copolymer (C) meets the following three conditions, namely,
condition 1) that it comprises 50-88 mole % of propylene unit, 2-30 mole % of ethylene unit and 10-40 mole % of 1-butene unit and that the content of 1-butene unit is greater than the content of ethylene unit;
condition 2) that it has an MFR, determined according to ASTM D-1238 at 230 C. under a load of 2.16 kg, of 0.1-50 g10 min.; and
condition 3) that it has a molecular weight distribution expressed by MwMn, determined by gel permeation chromatography (GPC), of 3 or less.
2. A polypropylene resin composition for non-stretched film as claimed in claim 1, wherein the polypropylene resin (A) comprises at least one selected from the group consisting of propylene homopolymers, propylene-olefin random copolymers having a content of the -olefin other than propylene of 10 mole % or lower and propylene-olefin block-copolymers having a content of n-decane-extractable portion of 10% by weight or less.
3. A polypropylene resin composition for non-stretched film as claimed in claim 1 or 2, wherein the ethylene-olefin random copolymer (B) is an ethylenebutene random copolymer having an ethylene unit content of 60-95 mole % and a 1-butene unit content of 5-40 mole %.
4. A non-stretched film made of a polypropylene resin composition as claimed in either one of claims 1 to 3.