Conductive polymer/zinc oxide composite counter electrode and preparation method thereof

A conductive polymer and zinc oxide technology, applied in electrolytic capacitors, circuits, capacitors, etc., can solve the problems of poor adhesion and easy falling off, and achieve the effects of low sheet resistance, developed pore structure, and excellent stability

Inactive Publication Date: 2015-08-26
XINYU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the long-term stability of carbon-based composite counter electrodes is still an open problem, due to the poor adhesion of loose granular or powdered carbon materials on the surface of conductive substrates and easy to fall off.

Method used

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  • Conductive polymer/zinc oxide composite counter electrode and preparation method thereof
  • Conductive polymer/zinc oxide composite counter electrode and preparation method thereof
  • Conductive polymer/zinc oxide composite counter electrode and preparation method thereof

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Embodiment 1

[0040] like figure 1 As shown, the present invention provides a conductive polymer / zinc oxide composite counter electrode, comprising a conductive substrate 1 covered with a zinc oxide layer 2 covered with a cross-linked pore structure The composite catalytic layer 3, wherein, the composite catalytic layer 3 includes a nanoporous zinc oxide film 31 and a layer of PEDOT:PSS (poly(3,4-ethylenedioxy) adsorbed on the surface of the nanoporous zinc oxide film Thiophene)-poly(styrenesulfonic acid)).

[0041] Wherein, the pores in the nanoporous zinc oxide film are fully open pore structures.

[0042] The thickness of the composite catalytic layer is 2-10 μm.

[0043] The zinc oxide layer is a dense zinc oxide layer, and the thickness of the dense zinc oxide layer is 10 nm˜1 μm.

[0044] The conductive substrate is any one of transparent conductive glass, metal substrate and carbon substrate.

Embodiment 2

[0046] The invention provides a method for preparing a conductive polymer / zinc oxide composite counter electrode, comprising the following steps:

[0047] 1) Glue compounding: according to the weight ratio of ethanolamine:zinc acetate dihydrate:ethylene glycol methyl ether=1:4.12:30, zinc oxide sol was obtained by stirring at 60°C;

[0048] 2) Coating film: the zinc oxide sol is deposited on the conductive substrate by spin coating;

[0049] 3) Heat treatment: heat preservation at 300°C for 0.5h in an air atmosphere to obtain a dense zinc oxide layer covering the conductive substrate;

[0050] 4) Mixing: uniformly mix zinc oxide mixed slurry by the weight ratio of nano zinc oxide particles: zinc oxide sol: polyethylene glycol 20000: water: triton=1:2:0.2:4:0.08;

[0051] 5) Coating: the zinc oxide mixed slurry is coated on the dense zinc oxide layer on the conductive substrate by scraping;

[0052] 6) Sintering: heat preservation at 450°C for 0.5h in an air atmosphere to obt...

Embodiment 3

[0062] The invention provides a method for preparing a conductive polymer / zinc oxide composite counter electrode, comprising the following steps:

[0063] 1) Glue compounding: according to the weight ratio of ethanolamine:zinc acetate dihydrate:ethylene glycol methyl ether=1:2:10, zinc oxide sol was obtained by stirring at 60°C;

[0064] 2) Coating film: the zinc oxide sol is deposited on the conductive substrate by spin coating;

[0065] 3) Heat treatment: heat preservation at 500°C for 0.1h in an air atmosphere to obtain a dense zinc oxide layer covering the conductive substrate;

[0066] 4) Mixing: uniformly mix zinc oxide mixed slurry by weight ratio of nano-zinc oxide particles: zinc oxide sol: polyethylene glycol 20000: water: triton=1:0.1:0.1:1:0.02;

[0067] 5) Coating: the zinc oxide mixed slurry is coated on the dense zinc oxide layer on the conductive substrate by scraping;

[0068] 6) Sintering: heat preservation at 300°C for 1 hour in an air atmosphere to obtain...

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Abstract

The invention discloses a conductive polymer/zinc oxide composite counter electrode and a preparation method thereof. The composite counter electrode has a sandwich structure in which three layers are sequentially stacked. The composite counter electrode comprises a conductive substrate, a composite catalyst layer with a cross-linked pore structure and a compact zinc oxide layer located between the conductive substrate and the composite catalyst layer, wherein the composite catalyst layer comprises a nanometer porous zinc oxide film and a layer of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS) adsorbed to the surface of the nanometer porous zinc oxide film. In the composite counter electrode, the nanometer porous zinc oxide film enables the composite catalyst layer to be crosslinked porous in shape so as to be conducive to adsorbing more PEDOT:PSS, and the excellent electron mobility of the nanometer porous zinc oxide film provides guarantee for transmitting external circuit electrons to the PEDOT:PSS surface from the conductive substrate more quickly and enabling the external circuit electrons to participate in electrolyte reduction; and the compact zinc oxide layer not only can improve contact between the composite catalyst layer and the conductive substrate, but also can significantly improve open-circuit voltage of a dye-sensitized solar cell assembled by the composite counter electrode and corrosion imposed on a substrate material by an electrolyte in a completely isolated device.

Description

technical field [0001] The invention relates to the technical field of new energy, in particular to a conductive polymer / zinc oxide composite counter electrode for a dye-sensitized solar cell and a preparation method thereof. Background technique [0002] Solar energy is one of the most abundant renewable energy resources, with unique advantages and huge potential for development and utilization. Making full use of solar energy is conducive to maintaining the harmonious coexistence between human beings and nature and the coordinated development of energy and the environment. The dye-sensitized solar cell is a device that directly converts solar energy into electrical energy. Its invention undoubtedly opens up a new way to solve the urgent energy problems in the world today. [0003] Dye-sensitized solar cells are composed of four parts: photoanode, sensitizer, electrolyte and counter electrode. The role of the counter electrode is to catalyze the reduction of electrolyte an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042
CPCY02E10/542
Inventor 徐顺建罗玉峰钟炜肖宗湖罗永平欧惠吴欢文
Owner XINYU UNIV
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