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Photoelectric conversion polyoxometalate/mixed hemicyanine dye thin films

A polyoxometalate and thin film technology, applied in circuits, electrical components, solar cells, etc.

Inactive Publication Date: 2016-01-20
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the photoelectrochemically active thin film materials assembled with mixed hemicyanine dyes and polyoxometalates

Method used

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  • Photoelectric conversion polyoxometalate/mixed hemicyanine dye thin films
  • Photoelectric conversion polyoxometalate/mixed hemicyanine dye thin films
  • Photoelectric conversion polyoxometalate/mixed hemicyanine dye thin films

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: {BW 12 / N 3 C 1 (1:1)} n Film preparation

[0015] Polyoxometalate BW 12 Prepared to 1mmol·L -1 And adjust the pH=2 of the solution for subsequent use; the half cyanine dye N 3 with C 1 Mix according to the molar ratio of 1:1 to obtain the mixed semicyanine dye solution A for later use.

[0016] Immerse the cleaned and silanized substrate in the above 1mmol·L -1 BW 12 In the aqueous solution for 1 hour, take it out, rinse it repeatedly with deionized water, and dry it with air. At this time, a layer of BW is assembled on the outside of the substrate. 12 ; Then immerse the substrate in the mixed semicyanine dye solution A for 1h, take it out, rinse it repeatedly with deionized water, and dry it with air. Repeat the above operations to obtain the required {BW 12 / N 3 C 1 (1:1)} n Multilayer self-assembled films.

[0017] The UV-Vis spectrum characterization of the film was carried out on a CARY-50 UV-Vis spectrophotometer produced by Varian Corpo...

Embodiment 2

[0018] Example 2: {BW 12 / N 3 C 1 (1:2)} n Film preparation

[0019] The hemicyanine dye N 3 with C 1 Mix according to the molar ratio of 1:2 to obtain the mixed semicyanine dye solution B for later use.

[0020] The preparation steps and testing steps refer to Example 1. One layer of BW has been assembled 12 The solution in which the substrate is immersed is the mixed hemicyanine dye solution B.

[0021] The ultraviolet-visible spectrum shows that the absorbance of the prepared film at the wavelength of 260nm and 552nm increases linearly with the increase of the number of layers, indicating that the prepared {BW 12 / N 3 C 1 (1:2)} n The film has good uniform growth.

Embodiment 3

[0022] Example 3: {BW 12 / N 3 C 1 (2:1)} n Film preparation

[0023] The hemicyanine dye N 3 with C 1 According to the material ratio of 2:1, the mixed semicyanine dye solution C is obtained for use.

[0024] Synthesis steps and testing steps refer to Example 1. A layer of BW has been assembled outside the substrate 12 The solution in which the substrate is immersed is the mixed hemicyanine dye solution C.

[0025] The ultraviolet-visible spectrum shows that the absorbance of the prepared film at the wavelength of 262nm and 510nm increases linearly with the increase of the number of layers, indicating that the prepared {BW 12 / N 3 C 1 (2:1)} n The film has good uniform growth.

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Abstract

The invention provides a photovoltaic conversion polyoxometallate / mixed hemicyanine dye film, and relates to a preparing method of a polyoxometallate and mixed hemicyanine derivative self-assembled film and evaluation on photovoltaic conversion property. The film is prepared from K5[BW12O42] and mixed hemicyanine dye bromide (E)-1,1'-(1,3-propyl)bi(4-((E)-2-(4-(dimethylamino)1-naphthyl)vinyl)pyridine) and bromide (E)-1,1'-methylene bi(4-(4(dimethylamino)styryl)pyridine) in different proportions through adopting the layer by layer self-assembly method via static. The prepared film can generate the light current of 4.1-5.2 muA when a bias voltage of -0.3 V(vs SCE) is exerted and the film is irradiated by white light (lambda smaller than 730 nm and larger than 325 nm) with the light intensity of 100 mW / cm<2>, and the film has potential application prospect in the aspect of development of solar cells.

Description

technical field [0001] The invention relates to an inorganic-organic self-assembled film, in particular to an inorganic / organic hybrid film self-assembled by polyoxometalates and mixed semicyanine dyes. Background technique [0002] Under the current situation that the global fossil energy is frequently running out, solar cells, as one of the new energy industries, have great potential for development and application. Today, improving efficiency and reducing costs have become two core issues in the current research and development of solar cells. The development of crystalline silicon solar cell technology has been relatively mature, but its environmental problems such as high cost, high energy consumption, and high pollution are also particularly prominent. In contrast, organic-inorganic hybrid thin film materials have low cost, simple production process, and high photoelectric conversion efficiency. Relatively high, and the advantages of environmental friendliness, so mor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M14/00
CPCH01M14/005
Inventor 高丽华王克志陈希
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY