Axial coordination self-assembly metal porphyrin dye sensitizer and preparation method thereof

A dye sensitizer and metalloporphyrin technology, applied in the field of chemical applications, can solve the problems of incomparable photoelectric conversion efficiency, low photocurrent and photovoltage, consumption of ruthenium complexes, etc., to achieve multi-channel electron transfer and improve luminescence performance. , the effect of enhanced controllability

Inactive Publication Date: 2017-05-24
NORTHWEST NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The highest photoelectric conversion efficiency of dye-sensitized solar cells dominated by polypyridine ruthenium complexes has exceeded 11%, but ruthenium complexes consume a lot of energy and cause great pollution to the environment, so large-scale production is actually subject to great challenges. limit
Due to the low photocurrent and photovoltage of pure organic photosensitizers, their photoelectric conversion efficiency is not comparable to that of polypyridine ruthenium complexes.

Method used

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  • Axial coordination self-assembly metal porphyrin dye sensitizer and preparation method thereof
  • Axial coordination self-assembly metal porphyrin dye sensitizer and preparation method thereof
  • Axial coordination self-assembly metal porphyrin dye sensitizer and preparation method thereof

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Effect test

Embodiment 1

[0029] (1) TiO 2 Preparation of nanostructured double-layer film electrodes: 7.0 μm transparent layer (20-nm-sized) and 5.0 μm scattering layer (Dyesol, 400-nm-sized) on FTO conductive glass (Nippon Sheet Glass, 4mmol thick) screen printing Make double-layer mesoporous titania film as negative electrode of battery, concrete preparation adopts following references ( J. Phys. Chem. B., 2003, 107, 14336 ).

[0030] (2) Construction of the metalloporphyrin dye sensitizer: the prepared TiO 2 The nanostructured double-layer membrane electrode was immersed in 2 mmol of carboxylic acid anchor zinc porphyrin in methanol solution for 24 hours; washed and dried in the air; then soaked in chloroform solution of 3 mmol soaked antenna molecule X1 for 2 hours; washed and dried in the air , to ensure a coverage rate of more than 90%; at this time, the anchor molecules and antenna molecules are adsorbed on the TiO in an inverted axial coordination manner. 2 on the electrode.

[0031] (3) ...

Embodiment 2

[0034] The antenna molecule adopts X2. Others are all the same as in Example 1. The J of the prepared dye-sensitized solar cell is 4.08mA / cm 2 , V is 359mV, and the maximum value of IPCE is 72%.

[0035] Synthesis of antenna molecule X2: Mix 4-aminopyridine and 4-(diphenylamino)benzaldehyde in a molar ratio of 1:1~1:1.5 in 50mL toluene solution, add and stir to react at 80~100℃ for 4~ After cooling to room temperature for 6 hours, rod-like crystals were precipitated, filtered, washed and dried to obtain product X2.

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Abstract

The invention discloses an axial-coordination self-assembly metalloporphyrin dye sensitizer which is absorbed to a TiO2 electrode in an inversely inserted axial coordination mode by taking carboxylic porphyrin metallic complex as an anchor molecule and X1 or X2 as an antenna molecule. A porphyrin metallic photosensitive dye is constructed by virtue of the inversely inserted axial coordination mode, so that relatively more photoelectric passages are effectively supplied and thus multi-passage electron transfer is realized; the antenna molecule further improves the luminescence property, so that the photoelectric conversion efficiency is greatly improved. Compared with a traditional D-pi-A structure, the axial-coordination self-assembly metalloporphyrin dye sensitizer has the advantage that the controllability for space size and interaction direction around a ligand is enhanced. The result of a photoelectric property test indicates that a dye-sensitized solar cell prepared by the axial-coordination self-assembly metalloporphyrin dye sensitizer has relatively high current output capability and relatively high photoelectric conversion efficiency under irradiation of standard light.

Description

technical field [0001] The invention belongs to the field of chemical applications, and relates to a metalloporphyrin dye sensitizer, in particular to a preparation method of an axially coordinated self-assembled metalloporphyrin dye sensitizer, which is mainly used for the preparation of dye-sensitized solar cells. Background technique [0002] Dye-sensitized solar cells have become a research hotspot in recent years due to their low cost, less pollution, and easy availability. Dye-sensitized solar cells are mainly composed of five parts: nanoporous semiconductor film, dye sensitizer, redox electrolyte, counter electrode and transparent conductive glass. In order to continuously improve the photoelectric conversion efficiency of dye-sensitized solar cells, it is necessary to continuously improve the dye sensitizer. The hot spot sensitizers studied in recent years mainly include: polypyridine ruthenium complexes, porphyrin sensitizers, and pure organic sensitizers. The hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B47/08C09B47/22C07D487/22H01G9/20
CPCY02E10/542
Inventor 刘家成武彧张俊祥冯小霞郭文博
Owner NORTHWEST NORMAL UNIVERSITY
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