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Compound having heptamethine structure, sensitizing dye and photoelectric conversion element

A technology of photoelectric conversion elements and sensitizing dyes, which is applied in the fields of methine/polymethine dyes, electrical components, organic dyes, etc., can solve the problems of component performance degradation and inability to obtain sufficient photoelectric conversion performance, and achieve the goal of improving conversion efficiency Effect

Inactive Publication Date: 2013-11-27
GIFU UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this organic dye cannot obtain sufficient photoelectric conversion performance in a photoelectric conversion element using a redox couple other than iodine, and even in a photoelectric conversion element using an iodine redox couple, there remains a relatively early Problems such as degradation of component performance from the beginning of the period

Method used

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  • Compound having heptamethine structure, sensitizing dye and photoelectric conversion element
  • Compound having heptamethine structure, sensitizing dye and photoelectric conversion element
  • Compound having heptamethine structure, sensitizing dye and photoelectric conversion element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0208] The photoelectric conversion efficiency η (%) immediately after the completion of the solar cell when the compounds (a) to (d) and the comparative dye were respectively used in the electrolytic solution No. 1 using a sulfide-based redox agent is shown in Table 1. In addition, the relative ratio (%) of the conversion efficiency η when the result of Comparative Example 1 is set as 100, and the elapsed time when the result immediately after the completion of the solar cell production is set as 100 as the element performance retention rate are also recorded. The relative ratio (%) of conversion efficiency η after 30 days.

[0209] Table 1

[0210]

Embodiment 5、6

[0212] Table 2 shows the photoelectric conversion efficiency η (%) when the compounds (a), (c) and the comparative dye were respectively used in the electrolytic solution No. 2 using a sulfide-based redox agent. In addition, the relative ratio (%) of the conversion efficiency η when the result of Comparative Example 2 is set as 100, and the elapsed time when the result immediately after the completion of the solar cell production is set as 100 as the element performance retention rate are also recorded. The relative ratio (%) of conversion efficiency η after 30 days.

[0213] Table 2

[0214]

[0215] From the results shown in Tables 1 and 2, it can be seen that the conversion of Examples 1 to 6 using the compound of the present invention as a sensitizing dye was compared to Comparative Examples 1 and 2 using the comparative dye shown in Patent Document 2. The efficiencies were each markedly increased, and performance degradation was not seen even after 30 days or more a...

Embodiment 7

[0217] Also record the photoelectric conversion efficiency η (%) immediately after the completion of the solar cell unit production and after 45 days when the compound (a) and the comparative dye were used in the electrolyte solution No. 2 using an iodine-based redox agent, And the relative ratio (%) of the conversion efficiency η after 45 days when the result immediately after the solar battery cell production is set as 100 is the element performance retention rate.

[0218] table 3

[0219]

[0220] As shown in Table 3, compared with Comparative Example 3 using the comparative dye, Example 7 using the sensitizing dye of the present invention has an excellent element performance retention rate. Although the photoelectric conversion performance of the cell unit is slightly worse immediately after completion, it is It was excellent after 45 days. This is considered to be because, as described above, the improvement of the molecular structure inhibits the association of mo...

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Abstract

Provided are: a compound which has heptamethine structure and which is to be used as a sensitizing dye in a photoelectric conversion element, said compound being represented by formula (1); and a photoelectric conversion element which includes the compound as the sensitizing dye and which can resolve the problems of the prior art. In formula (1), R1 and R2 are each a hydrogen atom, alkyl or aryl; R3 to R6 are each C1-12 alkyl; X is a halogen atom; Y is a monovalent anion; when R3 to R6 are each C1-5 alkyl, Z is alkyl, alkoxy or aryl, while when R3 to R6 are each C6-5 alkyl, Z is a hydrogen atom, alkyl, alkoxy or aryl; and m and n are each an integer of 1 to 12.

Description

technical field [0001] The present invention relates to a near-infrared light-absorbing dye for a dye-sensitized solar cell using a semiconductor, and a photoelectric conversion element. Background technique [0002] In recent years, various solar cells have been proposed as photoelectric conversion elements for converting light energy into electric energy. Among them, the dye-sensitized solar cell announced by Gratzel et al. at the University of Lausanne in Switzerland in 1991 is expected to be put into practical use as a low-cost solar cell because the materials and processes used are cheap (Non-Patent Document 1). [0003] A dye-sensitized solar cell generally consists of a semiconductor electrode having a photoelectric conversion layer formed of a semiconductor adsorbed with a sensitizing dye on a conductive substrate, and a conductive substrate disposed opposite to the semiconductor electrode. A counter electrode having a catalyst layer, and an electrolyte layer held b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/14C09B23/00H01L31/04H01M14/00
CPCY02E10/542C09B23/0066H01L51/422C07D209/14H01L51/0064Y02E10/549H01G9/2059C09B23/086H10K85/652
Inventor 齐藤恭辉船曳一正日比野温彦田中汀
Owner GIFU UNIVERSITY