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Dye-sensitized solar cell and method of manufacturing the same

A technology of solar cells and dye sensitization, which is applied in the field of solar cells, can solve problems such as dissipation and energy conversion efficiency reduction, and achieve the effects of improving competitiveness, preventing electron dissipation, and improving energy conversion efficiency

Inactive Publication Date: 2008-04-02
ELECTRONICS & TELECOMM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This condition allows electrons to react with the oxidizing / reducing electrolyte and dissipate ineffectively
In addition, electrons generated by light can also escape on the surface of the conductive substrate, thus reducing the energy conversion efficiency

Method used

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  • Dye-sensitized solar cell and method of manufacturing the same
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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] A method of manufacturing the dye-sensitized solar cell 100 according to the present invention will be described below.

[0040] In order to manufacture the semiconductor electrode 10 as a cathode, the conductive substrate 12 on which the semiconductor oxide layer 14 is formed is prepared. The semiconductor oxide layer 14 may have a thickness of 5˜15 μm. Then, the conductive substrate 12 on which the semiconductor oxide layer 14 is formed is immersed in a dye solution formed from a ruthenium complex for 24 hours or longer to coat the surface of the semiconductor oxide layer 14 with a dye molecule layer 16 .

[0041] The obtained structure having the dye molecule layer 16 formed thereon is placed on N 2 Dry under atmosphere to remove the alcohol-based organic solvent from the surface of the resulting structure.

[0042] Next, an insulating layer 18 is formed on the surfaces of the conductive substrate 12 and the semiconductor oxide layer 14 exposed through the dye mol...

Embodiment 1

[0056] Fabrication of dye-sensitized solar cells

[0057] Using synthesized TiO 2 paste, the first TiO was formed on the FTO substrate by the screen printing method 2 nanoparticle layer. After drying and sintering at 500 °C, the first TiO 2 The second TiO2 containing light-scattering particles with a diameter of 200-400nm is formed on the nanoparticle layer 2 nanoparticle layer, then dried and sintered to produce TiO 2 Thin film, which is a double layer with a thickness of 20 μm.

[0058] The obtained TiO was formed on it 2 The structure of the film is added to the alcohol solution in which the ruthenium dye (4,4'-dicarboxy-2,2-dipyridine) bis(thiocyanato)ruthenium (II): N3) is dissolved, so that the dye is attached to the TiO 2 the surface of the film. The resulting structure with the dye attached thereto was washed with ethanol and dried. The samples prepared after such treatment were divided into three groups.

[0059] Triethoxyoctylsilane, octadecyltrichlorosil...

Embodiment 3

[0066] Measuring photovoltage and photocurrent

[0067] In order to evaluate the light conversion efficiency of the dye-sensitized solar cell prepared in Example 1, the photovoltage and photocurrent of the dye-sensitized solar cell were measured as follows. To do this, use a light source meter (Keithley2400SourceMeter  ) to form a solar simulator. Here, a xenon lamp (Oriel, 91193) was used as a light source.

[0068] 3 is a graph evaluating current density and voltage of the dye-sensitized solar cell of Example 1 according to an embodiment of the present invention.

[0069] Referring to Figure 3, the graphs illustrate the current densities and voltages of dye-sensitized solar cells "A", "B" and "C", wherein "A", "B" and "C" are respectively Octylsilane, octadecyltrichlorosilane, and methylphosphoric acid form self-assembled organic layers for solar cells. In addition, "D" refers to the current density and voltage of the dye-sensitized solar cell prepared in Example 2 fo...

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Abstract

A dye-sensitized solar cell in which an insulating layer is formed on exposed surfaces of a semiconductor oxide layer in a semiconductor electrode and a conductive substrate, and a method of manufacturing the dye-sensitized solar cell are provided. The dye-sensitized solar cell includes a semiconductor electrode and an opposing electrode disposed to face each other, and an electrolyte solution interposed between the electrodes. The semiconductor electrode includes a conductive substrate, a semiconductor oxide layer formed on the semiconductor electrode, a dye molecule layer adhered to the surface of the semiconductor oxide layer, and an insulating layer formed on the surfaces of the semiconductor oxide layer exposed through the dye molecule layer and the conductive substrate. The insulating layer is formed of a self-assembling organic layer which is self-assembled on the surfaces of the semiconductor oxide layer and the conductive substrate by a chemical bond.

Description

[0001] Cross-references to related patent applications [0002] This application claims the benefit of Korean Patent Application No. 10-2006-0096412 filed with the Korean Intellectual Property Office on September 29, 2006, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to solar cells, and more particularly, the present invention relates to dye-sensitized solar cells comprising a semiconductor oxide layer coated with dye molecules. Background technique [0004] Different from silicon solar cells manufactured by utilizing existing P-N junctions, dye-sensitized solar cells are photoelectrochemical solar cells whose main components are photosensitive dye molecules capable of generating electron-hole pairs by absorbing visible light, and the resulting Electronic transition metal oxides. Representative examples of such dye-sensitized solar cells are those proposed by Graetzel et al. in Switzerlan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/04H01L31/18H01L51/42H01L51/48H01G9/20H01M14/00
CPCY02E10/542H01L51/0086H01G9/2031Y02P70/50H10K85/344H01L31/04H01L31/18
Inventor 全容奭姜晚求金钟大
Owner ELECTRONICS & TELECOMM RES INST