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A kind of preparation method of three-dimensional porous structure dye-sensitized solar cell counter electrode

A solar cell and dye sensitization technology, applied in the field of solar cell preparation, can solve the problems that the platinum counter electrode cannot meet the requirements of flexible battery preparation, it is difficult to control the thickness of the deposited film, and it is not suitable for industrialization, so as to reduce electron-hole recombination probability, short preparation period and low cost

Active Publication Date: 2022-07-05
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, platinum metal has the following disadvantages as the counter electrode: (1) the reserves are low, the price is expensive and not suitable for industrialization; (2) the platinum counter electrode prepared by pyrolysis cannot meet the preparation requirements of flexible batteries; (3) it is easy to combine with I 3 - Corroded by reaction, reducing catalytic performance
Although this method takes a relatively short time, due to the violent reaction process, it is difficult to control the thickness of the deposited film, and the crystallinity is relatively poor, and the battery efficiency is low

Method used

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  • A kind of preparation method of three-dimensional porous structure dye-sensitized solar cell counter electrode
  • A kind of preparation method of three-dimensional porous structure dye-sensitized solar cell counter electrode
  • A kind of preparation method of three-dimensional porous structure dye-sensitized solar cell counter electrode

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Weigh 2mmol of CuCl 2 2H 2 O, 2mmol of thiourea was added to the three-necked flask, and then 40mL of ethylene glycol was added and stirred evenly with ultrasonic waves until it was completely dissolved.

[0030] (2) put the mixed solution obtained in step (1) into the magnetic stirring heater, install the condensing pipe and pass into cold water, then carry out the first step heating, the temperature is set to 130 ℃, the stirring speed is 300r / min, and the temperature is kept for 30min ; Carry out the second step of heating, set the temperature to 150 °C, the stirring speed is 300 r / min, and the temperature is kept for 30 min.

[0031] (3) after completing the two-step heating reaction, the obtained solution is naturally cooled to room temperature, then dispensed into a centrifuge tube and added with absolute ethanol (the volume ratio of absolute ethanol / mixed solution is 1.5) to mix well, put into a centrifuge for centrifugation, The centrifugation speed was 10,...

Embodiment 2

[0039] (1) Weigh 2mmol of CuCl 2 2H 2 O, 2mmol of n-dodecanethiol was added to the three-necked flask, and then 60mL of ethylene glycol was added to ultrasonically stir evenly until it was completely dissolved.

[0040] (2) put the mixed solution obtained in step (1) into the magnetic stirring heater, install the condensing pipe and pass into cold water, then carry out the first step of heating, the temperature is set to 120 ° C, the stirring speed is 400 r / min, and the temperature is kept for 50 min ; Carry out the second step of heating, set the temperature to 170°C, stir at a speed of 400r / min, and keep the temperature for 60min.

[0041] (3) after completing the two-step heating reaction, the obtained solution is naturally cooled to room temperature, then dispensed into a centrifuge tube and added with absolute ethanol (the volume ratio of absolute ethanol / mixed solution is 1.5) to mix evenly, put into a centrifuge for centrifugation , the centrifugation speed is 10000r / ...

Embodiment 3

[0049] (1) Weigh 2mmol of CuCl 2 2H 2 O, 2 mmol of carbon disulfide was added to the three-necked flask, then 60 mL of ethylene glycol was added and stirred evenly with ultrasonic waves until it was completely dissolved.

[0050] (2) put the mixed solution obtained in step (1) into the magnetic stirring heater, install the condensing pipe and pass into cold water, then carry out the first step of heating, the temperature is set to 120 ° C, the stirring speed is 400 r / min, and the temperature is kept for 50 min ; Carry out the second step of heating, set the temperature to 200 °C, the stirring speed is 400 r / min, and the temperature is kept for 60 min.

[0051] (3) after completing the two-step heating reaction, the obtained solution is naturally cooled to room temperature, then dispensed into a centrifuge tube and added with absolute ethanol (the volume ratio of absolute ethanol / mixed solution is 1.5) to mix evenly, put into a centrifuge for centrifugation , the centrifugati...

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Abstract

The invention discloses a preparation method of a three-dimensional porous structure dye-sensitized solar cell counter electrode, belonging to the technical field of solar cells. The invention synthesizes a special rose-like structure CuS nanocrystalline material by a step-by-step liquid phase reflux heating method. A gelling agent with thickening function is added to make a semi-solid colloidal viscous body, and then a CuS film is prepared by a rolling method, and a three-dimensional porous structure counter electrode with high catalytic activity is obtained after heat treatment. The highest cell efficiency of the electrode reaches 5.0%, the corresponding open-circuit voltage is 0.69V, and the short-circuit current density is 9.7mA / cm 2 ; Under the same assembly and test conditions, the performance is comparable to the commercial platinum counter electrode's 5.8% cell efficiency, with a large room for improvement.

Description

technical field [0001] The invention relates to a preparation method for a counter electrode of a dye-sensitized solar cell based on a three-dimensional porous structure, and belongs to a method in the technical field of solar cell preparation. Background technique [0002] With the sharp increase in global energy demand, the burning of fossil fuels has caused a series of environmental problems and seriously threatened the survival of human beings. The development of new energy has become an international consensus. As a new type of solar energy utilization technology, dye-sensitized solar cells can be flexibly applied to various scenarios in life, especially in combination with buildings, due to their low cost, simple preparation process, wide range of color choices, and small restrictions on shape design. Building integration of photovoltaics. [0003] Dye-sensitized solar cells with I 3 The / I redox reaction pair acts as a medium to transfer charge between the photoanod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20H01G9/042
CPCH01G9/2022H01G9/2031Y02P70/50
Inventor 朱艳卢勇孙淑红沈韬
Owner KUNMING UNIV OF SCI & TECH
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