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Natural dyestuff sensitizer on plateau for dye-sensitized solar cell

A solar cell and natural dye technology, applied in the field of plateau natural dye sensitizers, can solve problems such as high cost, environmental pollution, and complicated preparation process, and achieve the effects of low cost, environmental friendliness, and simple and easy preparation method

Inactive Publication Date: 2013-12-18
QINGHAI UNIVERSITY
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of complex preparation process, serious environmental pollution and high cost of the dye sensitizer used in the prior art dye-sensitized solar cells, and provide a low-cost, environmentally friendly and simple preparation process. Plateau natural dye sensitizers for dye-sensitized solar cells

Method used

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  • Natural dyestuff sensitizer on plateau for dye-sensitized solar cell
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  • Natural dyestuff sensitizer on plateau for dye-sensitized solar cell

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preparation example Construction

[0010] A method for preparing a plateau natural dye sensitizer for dye-sensitized solar cells, characterized in that: the method comprises the following steps:

[0011] 1) Drying and crushing of petals Wash the red petals picked from the Qinghai-Tibet Plateau with clean water and dry them in the shade, place them in a blast drying oven at 50°C for 15 minutes, and crush them to obtain red petal powder for later use;

[0012] 2) Place the red petal powder obtained in step 1) in a 1mol / L ethanol solution of HCL, store in the dark and soak overnight, and filter to obtain the stock solution of plateau plant pigments;

[0013] 3) When the plateau plant pigment stock solution obtained in step 2) is concentrated to 1∕2 of the original solution, use 1mol / L NaOH ethanol solution to adjust the pH value of the filtrate to be close to neutral. At this time, a small amount of precipitation appears below the solution;

[0014] 4) When a small amount of precipitation occurs in step 3), quickl...

Embodiment 1

[0017] Preparation method of plateau natural dye sensitizer for dye-sensitized solar cells:

[0018] Step 1: Take out the petals of nasturtium flowers picked from the Qinghai-Tibet Plateau, wash them with water and dry them in the shade, then place them in a blast drying oven at 50°C for 15 minutes, and crush them to obtain red petal powder for later use;

[0019] Step 2: Place 0.5 gram of nasturtium flower petal powder in 50 ml of 1mol / L ethanol solution of HCL, store in the dark and soak overnight, keep the temperature at 35°C, and then use suction filtration funnel to obtain the nasturtium pigment stock solution;

[0020] Step 3: Using a rotary evaporator, the temperature is between 25°C and 40°C. When the nasturtium pigment stock solution is concentrated to 1∕2 of the original solution, use 1mol / L NaOH ethanol solution to adjust the pH value of the filtrate to be close to neutral , a small amount of green precipitate appeared below the solution;

[0021] Step 4: When the...

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Abstract

The invention relates to the technical field of a solar cell, and particularly relates to a natural dyestuff sensitizer on a plateau for a dye-sensitized solar cell. An ingredient of the sensitizer disclosed by the invention is plant anthocyanin which contains a plurality of -OHs in a molecular structure and can be adsorbed on a TiO2 film in a chemical adsorption manner. By adopting the natural dyestuff sensitizer, the geographic features of high elevation of the Tibet plateau and long ultraviolet ray irradiation time are fully utilized; a Tibet plateau plant containing the anthocyanin is selected; the natural dyestuff sensitizer on the plateau for the dye-sensitized solar cell is extracted from the Tibet plateau plant. The natural dyestuff sensitizer on the plateau has the advantages of being simple in extraction process, friendly to the environment, low in cost and the like, and has a better market development prospect; meanwhile, a revenue channel is also provided for local farmers. Therefore, the natural dyestuff sensitizer has good economic benefits.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a plateau natural dye sensitizer for dye-sensitized solar cells. Background technique [0002] Dye-sensitized solar cell (DSC for short), also known as "Gratzel" battery, is a new type of high-efficiency solar cell invented by the team of Professor M Gratzel of the Swiss Federal Institute of Technology in Lausanne (EPFL) in 1991. Not only the manufacturing process is very simple, but also does not require expensive and energy-consuming high-temperature treatment and high-vacuum processing, so the production cost of the device is very low, which is estimated to be only about 1 / 5 of silicon-based solar cells. The theoretical conversion efficiency of DSC is very high, which can reach 33%, exceeding the theoretical conversion efficiency of monocrystalline silicon-based solar cells. Based on the above reasons, DSC is therefore considered to be a strong competitor and substitute f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C07D311/62H01G9/20
CPCY02E10/542
Inventor 王刚杨桂军林红南辉陈慧媛
Owner QINGHAI UNIVERSITY
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