Dye-sensitized photoelectric conversion element

A technology for photoelectric conversion elements and pigment sensitization, applied in electrical elements, photovoltaic power generation, circuits, etc., can solve the problems of inability to exert the function of solar cells, and achieve the effect of improving transparency, reducing the amount of addition, and reducing coloring

Inactive Publication Date: 2011-06-01
ZEON CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the report, if iodine is not added at all, solar cells cannot function

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0088] In the preparation of the electrolytic solution, the amount of iodine added to the iodide ion can be reduced to the same mole % or less as the above-mentioned triiodide ion.

[0089] The organic solvent is preferably an aprotic polar substance. Examples of the organic solvent include: five-membered ring cyclic carbonates, five-membered ring cyclic esters, aliphatic nitriles, aliphatic chain ethers, and aliphatic cyclic ethers.

[0090] The five-membered cyclic carbonate is preferably represented by the following formula (III).

[0091] [chemical 6]

[0092]

[0093] In formula (III), R 31 and R 32 Each independently, is a hydrogen atom or an aliphatic group with 1-20 carbon atoms. The aliphatic group is preferably an alkyl group. The number of carbon atoms in the aliphatic group is preferably 1-12, more preferably 1-6, and most preferably 1-3.

[0094] Examples of five-membered cyclic carbonates include ethylene carbonate and propylene carbonate.

[0095] The ...

Embodiment 1

[0262] (1) Electrolyte preparation

[0263] 0.066 g N-methylbenzimidazole, 0.738 g tetrabutylammonium iodide, 0.532 g 1,3-butylmethylimidazole Iodide and 0.058 g of guanidine thiocyanate were added to a 5 mL volumetric flask, and propylene carbonate was added to make the total amount 5 mL. An electrolytic solution not containing iodine was prepared by stirring with vibration of an ultrasonic cleaner for 1 hour, and then standing in a dark place for 24 hours or more.

[0264] As a reference iodine-containing electrolyte, 0.04 M iodine was dissolved in the above electrolyte. The absorption spectra of the electrolyte solution without iodine and the electrolyte solution containing iodine were measured with an optical path length of 1 mm. The result is as figure 2 shown.

[0265] figure 2 It is the absorption spectrum of the electrolyte solution (-) not containing iodine and the electrolyte solution (+) containing iodine (triiodide ion in the electrolyte solution). The hor...

Embodiment 2

[0289] A dye-sensitized photoelectric conversion element was produced in the same manner as in Example 1 except that propylene carbonate was changed to γ-butyrolactone in the preparation of (1) electrolytic solution in Example 1.

[0290] The obtained dye-sensitized photoelectric conversion element was evaluated in the same manner as in Example 1 (6). As a result, the same excellent output current as in Example 1 was obtained. In addition, the difference in the result of incident light from the front side and the back side is also small.

[0291] In the evaluation of (6) of Example 1, the dye-sensitized solar cell was tilted at 60 degrees, and the output current was further measured, and compared with the current output when the dye-sensitized solar cell was irradiated with vertical light. As a result, the current output at an inclination of 60 degrees was 80% of that of vertical light irradiation.

[0292] The durability of the dye-sensitized solar cell was investigated in ...

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Abstract

Disclosed is a dye-sensitized photoelectric conversion element having high energy conversion efficiency, wherein the amount of iodine added into the electrolyte solution is significantly reduced. The dye-sensitized photoelectric conversion element comprises a porous photoelectrode layer composed of dye-sensitized semiconductor particles, an electrolyte solution layer and a counter electrode layer in this order. The electrolyte solution layer is composed of an electrolyte solution which is obtained by dissolving 0.05-5 M of aliphatic quaternary ammonium ions, 0.05-5 M of imidazolium ions and 0.1-10 M of iodide ions in an organic solvent. Consequently, the amount of iodine added into the electrolyte solution can be significantly reduced.

Description

technical field [0001] The present invention relates to a dye-sensitized photoelectric conversion element. Background technique [0002] In recent years, research has been active on solid pn junction solar cells as photoelectric conversion elements that convert solar energy into electric power. Solid junction solar cells use silicon crystal or amorphous silicon thin films, and non-silicon-based compound semiconductor multilayer thin films. [0003] However, solid junction solar cells must be prepared at high temperature or under vacuum. Therefore, the preparation of solid junction solar cells has the disadvantages of high equipment cost and long energy recovery period. [0004] As a next-generation solar cell, the development of an organic solar cell that can be produced at a lower temperature at a lower cost is expected. Among organic solar cells, dye-sensitized solar cells that can be mass-produced at low cost in the atmosphere have attracted special attention. Patent ...

Claims

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Application Information

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IPC IPC(8): H01M14/00H01L31/04
CPCH01G9/2013H01G9/2031Y02E10/542H01G9/2059H01G9/2018
Inventor 宫坂力池上和志
Owner ZEON CORP
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