TANDEM SOLAR CELL
PROBLEM TO BE SOLVED: To solve such a problem that the use efficiency of the sunlight of conventional dye sensitized solar cells is theoretically 30% and is practically 10% at maximum.SOLUTION: A solar cell is configured by: arranging two glass substrates (11, 13), each of which is provided with a t...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To solve such a problem that the use efficiency of the sunlight of conventional dye sensitized solar cells is theoretically 30% and is practically 10% at maximum.SOLUTION: A solar cell is configured by: arranging two glass substrates (11, 13), each of which is provided with a transparent conductive film formed thereon, so that the transparent conductive layers (12) face each other; disposing a titanium dioxide layer (16) on one glass substrate; disposing silicon dioxide particles (18) on the other glass substrate; and filling the space between the two glass substrates with an electrolyte (15). The glass substrate on which light does not enter may alternatively be a metal plate. A sensitizing dye such as a ruthenium complex may be adsorbed onto the titanium dioxide layer or the silicon dioxide layer. Since the titanium dioxide layer generates electric power by means of ultraviolet light incident thereon and the silicon dioxide layer generates electric power by means of visible light and infrared light incident thereon, the comprehensive conversion efficiency of the solar cell is increased.SELECTED DRAWING: Figure 6
【課題】従来の色素増感ソーラーセルの太陽光利用率は、理論的に30%、実際には最大で10%であった。【解決手段】透明導電膜が形成された2枚のガラス基板(11,13)が各々の透明導電膜(12)を向かい合わせて配置し、ガラス基板の一方に2酸化チタン層(16)を配置し、他方に2酸化ケイ素粒子(18)を配置し、2枚のガラス基板の間に電解質(15)を充填してソーラーセルを構成する。光が入射しないガラス基板は金属板とすることもできる。2酸化チタン層あるいは2酸化ケイ素層にはルテニウム錯体等の増感色素を吸着させることもできる。2酸化チタン層は入射した紫外光により起電し、2酸化ケイ素層は入射した可視光及び赤外光により起電することにより、ソーラーセルの総合的な変換効率が高くなる。【選択図】図6 |
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