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Dye-sensitized solar cell, dye-sensitized solar cell module, and coating liquid for forming electrolyte layer

一种太阳能电池、色素敏化的技术，应用在涂布液领域，能够解决初始转换效率或耐久性不充分、电解质经时稳定性降低、碘化锂潮解性高易劣化等问题，达到光电转换效率高、经时稳定性提高、实现低价格化的效果

Inactive Publication Date: 2012-07-11
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is necessary to use a large amount of ionic liquid to obtain sufficient conversion efficiency. In this case, it is necessary to increase the amount of polymer compound added in order to maintain the ionic liquid, resulting in a vicious cycle of lower conversion efficiency.
[0010] In addition, conventionally, lithium iodide was used as a redox couple contained in the electrolyte layer (Patent Document 5), but since this lithium iodide is highly deliquescent and easily degraded, the stability of the electrolyte over time is reduced, and the conversion efficiency is greatly reduced from the initial value. reduced, or difficult to handle since lithium iodide itself would be rendered unusable by simply placing it
In addition, the obtained initial conversion efficiency or durability is not sufficient

Method used

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  • Dye-sensitized solar cell, dye-sensitized solar cell module, and coating liquid for forming electrolyte layer
  • Dye-sensitized solar cell, dye-sensitized solar cell module, and coating liquid for forming electrolyte layer
  • Dye-sensitized solar cell, dye-sensitized solar cell module, and coating liquid for forming electrolyte layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] Using 3-chloro-2-hydroxypropyltrimethylammonium chloride as a cationic cellulose derivative, cationized cationic hydroxyethyl cellulose (manufactured by Daicel Chemical Co., Ltd.; Jielna-QH200) was dissolved in 2.72 g of methanol. ; The degree of substitution m=1.3, the ratio of cationization is -CH 2 CH 2 0.043 g of potassium iodide was added to a solution of 0.14 g of OH group, and stirred to dissolve it. Next, 0.18 g of 1-ethyl-3-methylimidazolium tetracyanoborate (EMIm-TCB), 1-propyl-3-methylimidazolium iodide (PMIm-I) were added to the solution. 0.5g, and I 2 0.025g, stir to dissolve. Accordingly, a coatable coating solution for forming an electrolyte layer was prepared.

Embodiment 2～13

[0105] A coating liquid for forming an electrolyte layer was prepared in the same manner as in Example 1 above except that the formulation was changed. The preparation amount of each component is as shown in Tables 3-5 below. In addition, the coating liquid of Example 13 is the same as that of Example 7. In addition, in the table, "the ratio of KI (weight ratio)" means the ratio of KI except the solvent to all the materials constituting the electrolyte layer.

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Abstract

Disclosed is a dye-sensitized solar cell which comprises an electrolyte layer in a solid state, while having improved durability and improved photoelectric conversion efficiency. Specifically disclosed is a dye-sensitized solar cell (1) which is configured of a conductive base (10), a porous semiconductor layer (20) that is formed on the conductive base (10) and loaded with a sensitizing dye on the pore surfaces, a counter electrode (40) that is arranged so as to face the porous semiconductor layer (20), and an electrolyte layer (30) that is formed between the conductive base (10) and the counter electrode (40) and contains potassium iodide and a thermoplastic cellulose resin.

Description

technical field [0001] The present invention relates to a dye-sensitized solar cell, a solar cell module, and a coating solution used for forming an electrolyte layer in the solar cell. Background technique [0002] In recent years, global warming caused by carbon dioxide has become a global problem, and research and development of solar cells that are environmentally friendly and utilize sunlight as clean energy are being actively carried out. Among them, dye-sensitized solar cells have attracted attention as solar cells with higher photoelectric conversion efficiency and low cost. [0003] A dye-sensitized solar cell, for example, laminates a transparent substrate, a transparent conductive layer formed on the transparent substrate, an oxide semiconductor layer carrying a dye, an electrolyte layer having a redox couple and an electrolyte, and The substrate on which the counter electrode is formed forms a battery. In particular, the Gratzel battery is characterized by usin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M14/00H01L31/04
CPCH01G9/2059Y02E10/542H01G9/2009H01G9/2031
Inventor 小保内直博藤原亮
Owner DAI NIPPON PRINTING CO LTD
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