Buffer layer of flexible thin film solar cell and preparation method thereof

A technology of solar cells and flexible films, applied in circuits, electrical components, climate sustainability, etc., can solve problems such as metal cadmium environmental pollution, avoid pollution, improve band gap and resistivity, and solve high resistivity Effect

Active Publication Date: 2011-02-23
SHENZHEN DANBANG INVESTMENT GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In view of the above problems, the present invention provides a flexible thin-film solar cell buffer layer and its preparation method, which can not only

Method used

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  • Buffer layer of flexible thin film solar cell and preparation method thereof
  • Buffer layer of flexible thin film solar cell and preparation method thereof

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Experimental program
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Embodiment approach 1

[0042]The medicines of this embodiment are analytical reagents, and the aqueous solution is prepared with deionized water. The specific steps are as follows:

[0043] Weigh a certain amount of ZnSO 4 , the ZnSO 4 Prepare a solution of 0.02mol / L; weigh a certain amount of thiourea, dissolve it in deionized water to make a solution with a concentration of 1.0mol / L; weigh a certain amount of CuSO 4 , the CuSO 4 Prepared into a 0.02mol / L solution. First mix 20ml of the prepared zinc sulfate solution, 20ml of copper sulfate solution and 20ml of ammonia water (0.2mol / L) into the reactor, then add 10ml of thiourea solution and mix, and finally add deionized water until the volume of the entire mixed solution is 200ml , adjust the pH value of the mixed solution to about 8.5-8.8, put it into the deposition substrate, place the reactor in a water bath and heat it to 70°C to react, and form a buffer layer on the substrate, and the reaction time is 0.5h. The deposited substrate was ta...

Embodiment approach 2

[0045] The medicines used in this embodiment are analytical reagents, and the aqueous solution is prepared with deionized water. Specifically include the following steps:

[0046] Weigh a certain amount of ZnSO 4 , the ZnSO 4 Prepare a solution of 0.02mol / L; weigh a certain amount of thiourea, dissolve it in deionized water to make a solution with a concentration of 1.0mol / L, and weigh a certain amount of FeSO 4 , FeSO 4 Prepared into a 0.01mol / L solution. First, 20ml of the prepared zinc sulfate solution, 10ml of ferric sulfite solution and 20ml of ammonia (0.2mol / L) are mixed and placed in the reactor, then 10ml of thiourea solution is added to mix, and finally deionized water is added until the volume of the whole mixed solution is 200ml, adjust the pH value to about 9-9.5, put it into the deposition substrate, place the reactor in a water bath and heat it to 70°C to react to form a buffer layer, and the reaction time is 40min. The deposited substrate was taken out, wa...

Embodiment approach 3

[0048] Weigh a certain amount of ZnCl 2 , the ZnCl 2 Prepare a solution of 0.03mol / L; weigh a certain amount of thiourea, dissolve it in deionized water to make a solution with a concentration of 1.5mol / L, and weigh a certain amount of FeCl 2 , the FeCl 2 Prepared into a 0.02mol / L solution. First mix 20ml of zinc chloride solution, 10ml of ferrous chloride solution and 20ml of ammonia water (0.2mol / L) and place in the reactor, then add 10ml of prepared thiourea solution and mix, and finally add deionized water until the whole mix The volume of the solution is 200ml, adjust the pH value to about 8.5-8.8, put it into the deposition substrate, place the reactor in a water bath and heat it to 60°C to react to form a buffer layer, and the reaction time is 0.5h. The deposited substrate was taken out, washed with deionized water, and then dried with nitrogen to obtain a Fe-doped ZnS film with a thickness of about 60nm, a bandgap width of 3.1eV, and a resistivity of about 10 5 Ω·c...

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Abstract

The invention provides a buffer layer of a flexible thin film solar cell and a preparation method thereof. The buffer layer of the flexible thin film solar cell is a Zn1-xMxS thin film, wherein M may be doped metal ions; and x is more than 0 and less than 1. The preparation method for the buffer layer of the flexible thin film solar cell comprises the following step of: Z, chemically reacting a Zn-containing compound with an S-containing compound and adding the metal ions in the chemical reaction for metal ion doping to form the buffer layer on a flexible substrate. The buffer layer of the flexible thin film solar cell and the preparation method thereof have the advantages of solving the problem of environmental pollution of cadmium metal and improving the optical and electrical properties of the thin film, along with proper forbidden gap.

Description

technical field [0001] The invention relates to the field of thin-film solar cells, in particular to a flexible thin-film solar cell buffer layer and a preparation method thereof. Background technique [0002] In today's global energy crisis and increasing environmental pollution, solar energy has attracted more and more attention due to its advantages of no pollution, zero emissions, the widest distribution, and inexhaustible supply. Solar cells are one of the effective means to solve the increasingly serious energy crisis and environmental pollution. People are paying more and more attention to them. All countries in the world put the development of solar cell technology at the top of renewable energy. Among them, solar cell materials have become one of the most dynamic and attracting research fields. [0003] The first-generation solar cells based on crystalline silicon (monocrystalline silicon and polycrystalline silicon and their thin films) are currently in a dominant...

Claims

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Application Information

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IPC IPC(8): H01L31/0296H01L31/18
CPCY02P70/50
Inventor 刘萍
Owner SHENZHEN DANBANG INVESTMENT GROUP
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