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Photoelectric conversion element, process for producing same, optical sensor, and solar cell

A technology of photoelectric conversion elements and photoelectrodes, applied in electrical components, capacitors, photovoltaic power generation, etc., can solve the problems of high power generation cost expansion, etc., and achieve the effect of excellent practicability

Inactive Publication Date: 2012-02-01
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solar cells currently put into practical use have a PN junction type using inorganic semiconductors such as silicon, but the higher cost of power generation than other energy sources has become an obstacle to its expansion

Method used

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  • Photoelectric conversion element, process for producing same, optical sensor, and solar cell
  • Photoelectric conversion element, process for producing same, optical sensor, and solar cell
  • Photoelectric conversion element, process for producing same, optical sensor, and solar cell

Examples

Experimental program
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Embodiment approach 1

[0037] figure 1 is a sectional view showing the configuration of a photoelectric conversion element according to an embodiment of the present invention. figure 1 The photoelectric conversion element 100 shown in includes a photoelectrode 101 and a counter electrode (transparent electrode 107) arranged to face the photoelectrode 101, and the photoelectrode 101 includes a semiconductor layer (porous semiconductor layer 106) and a transparent conductive Substrate (transparent electrode 104). The photoelectrode 101 is formed of a substrate (transparent conductive substrate, transparent electrode 104 ) having a porous semiconductor layer 106 . Transparent electrodes 107 are stacked in such a manner as to face the photoelectrodes 101 .

[0038] As compounds having a light-absorbing function and a redox function, nitroxyl radical compounds having a 4,4,5,5-tetraalkylimidazoline-1-oxyl-3-oxide structure represented by general formula 1 mainly include between the photoelectrode 101 ...

Embodiment approach 2

[0095] According to the photoelectric conversion element 100 of Embodiment 1 ( figure 1 ) are well suited for use as, for example, dye-sensitized solar cells.

[0096] When sunlight is irradiated from the photoelectrode 101 side of the photoelectric conversion element 100, the sunlight sequentially passes through the transparent electrode 104 and the conductive layer 105, and irradiates a dye (not shown in the figure) absorbed on the porous semiconductor layer 106. The dye absorbs light and is thereby excited. Electrons generated by this excitation migrate from the porous semiconductor layer 106 to the conductive layer 105 . Electrons migrated to the conductive layer 105 migrate to the counter electrode 102 through an external circuit and return from the conductive layer 108 to the dye through the organic compound solution 109 . In this way, current flows to form a solar cell.

[0097] A plurality of photoelectric conversion elements according to the present invention can b...

Embodiment 1

[0116] A photoelectric conversion element according to the present invention was produced as follows. First, 5 g of commercially available titanium dioxide powder (product name: P25, manufactured by Nippon Aerosil Co., Ltd.), 20 mL of a 15% by volume acetate solution, 0.1 mL of a surfactant (product name : Triton X-100, manufactured by Sigma-Aldrich Co., Ltd.), and 0.3 g of polyethylene glycol (molecular weight: 20000) were stirred to prepare a titanium dioxide paste for forming a porous semiconductor layer.

[0117] Then, an appropriate amount (coating area: 3 cm x 3 cm) of titanium dioxide paste was coated on an ITO glass substrate (6 cm x 4 cm, sheet resistance: 20 Ω / □) to have a thickness of 20 μm using a doctor blade method. Here, the portion to which the paste was not applied was used as an electrode extraction portion and a sealing portion. Four through holes having 0.5 mmΦ were formed between the coating portion and the sealing portion. The electrode was inserted int...

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Abstract

The present invention provides a photoelectric conversion element including a photoelectrode (101) constituted of a porous semiconductor layer (106) and a transparent electrode (107) and a counter electrode (102) disposed opposite the photoelectrode (101), wherein a nitroxyl radical compound represented by general formula (1) is mainly contained between the photoelectrode (101) and the counter electrode (102). In general formula (1), A represents a substituted or unsubstituted aromatic group and optionally includes one or more oxygen, nitrogen, sulfur, silicon, phosphorus, boron, or halogen atoms, and the aromatic group may be one formed by fusion of a plurality of aromatic groups.

Description

technical field [0001] The present invention relates to a photoelectric conversion element and a manufacturing method thereof, an optical sensor and a solar cell. Background technique [0002] So far, various photoelectric conversion elements that convert light energy into electrical energy have been proposed. Among them, solar cells have been increasingly actively researched and developed as next-generation clean energy instead of fossil fuels. Solar cells currently put into practical use have a PN junction type using inorganic semiconductors such as silicon, but higher power generation costs than other energy sources have been an obstacle to their expansion. Accordingly, novel solar cells in which manufacturing costs can be greatly reduced have been proposed. [0003] In the dye-sensitized solar cell (Graetzel type) proposed by Graetzel et al. in 1991 at the Swiss Federal Institute of Technology in Lausanne, the same level of conversion efficiency as amorphous silicon wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M14/00H01L31/04
CPCH01G9/2013H01G9/2031Y02E10/542H01G9/2059H01G9/2018Y02P70/50
Inventor 小林宪司中原谦太郎须黑雅博中村新
Owner NEC CORP
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