Solar cell and preparation method thereof

A technology for solar cells and substrates, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of reducing the photoelectric conversion efficiency of organic-inorganic solar cells, being unable to be applied on a large scale, and taking a long time for methylation treatment. Improve the photoelectric conversion efficiency, increase the contact increase, and the effect of the method is simple and easy to implement

Active Publication Date: 2018-07-27
南通鸿图健康科技有限公司
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Problems solved by technology

[0003] In the preparation process of organic-inorganic hybrid solar cells, the defect states on the surface of the silicon substrate lead to electron-hole recombination, thereby greatly reducing the photoelectric conversion efficiency of organic-inorganic solar cells. In the prior art, in order to reduce the defect states on the surface of the silicon substrate, usually Methylation is used to form Si-CH3 bonds on the surface of silicon wafers to passivate the silicon surface. On the one hand, there are still a large number of defect states in silicon wafers treated with methylation. On the other hand, the process of methylation treatment is relatively complicated and The basic treatment takes a long time and cannot be applied on a large scale

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  • Solar cell and preparation method thereof

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[0017] A method for preparing a solar cell proposed in a specific embodiment of the present invention comprises the following steps:

[0018] (1) Cleaning of n-type silicon substrates: cut n-type silicon wafers into n-type silicon substrates with a size of 3 cm×3 cm, and then ultrasonically clean the n-type silicon substrates in acetone, ethanol, and deionized water for 10 -15 minutes, then put in concentrated H 2 SO 4 / H 2 o 2 mixed solution and heated to 100-110°C for 50-70 minutes, the concentrated H 2 SO 4 / H 2 o 2 H in the mixed solution 2 SO 4 with H 2 o 2 The volume ratio is 3:1, and then rinse the n-type silicon substrate with deionized water, and dry it with nitrogen for standby;

[0019] (2) Prepare a silicon nanowire array on the upper surface of the n-type silicon substrate: place the n-type silicon substrate obtained in step 1 in a mixed solution of silver nitrate / hydrofluoric acid, wherein the silver nitrate / hydrofluoric acid The molar concentration o...

Embodiment 1

[0026] A method for preparing a solar cell, comprising the steps of:

[0027] (1) Cleaning of n-type silicon substrates: cut n-type silicon wafers into n-type silicon substrates with a size of 3 cm×3 cm, and then ultrasonically clean the n-type silicon substrates in acetone, ethanol, and deionized water for 12 minutes, then put in concentrated H 2 SO 4 / H 2 o 2 mixed solution and heated to 105°C for 70 minutes, the concentrated H 2 SO 4 / H 2 o 2 H in the mixed solution 2 SO 4 with H 2 o 2 The volume ratio is 3:1, and then rinse the n-type silicon substrate with deionized water, and dry it with nitrogen for standby;

[0028] (2) Prepare a silicon nanowire array on the upper surface of the n-type silicon substrate: place the n-type silicon substrate obtained in step 1 in a mixed solution of silver nitrate / hydrofluoric acid, wherein the silver nitrate / hydrofluoric acid The molar concentration of hydrofluoric acid in the acid mixed solution is 4.8mol / l, and the molar c...

Embodiment 2

[0035] A method for preparing a solar cell, comprising the steps of:

[0036] (1) Cleaning of n-type silicon substrates: cut n-type silicon wafers into n-type silicon substrates with a size of 3 cm×3 cm, and then ultrasonically clean the n-type silicon substrates in acetone, ethanol, and deionized water for 15 minutes, then put in concentrated H 2 SO 4 / H 2 o 2 mixed solution and heated to 110°C for 50 minutes, the concentrated H 2 SO 4 / H 2 o 2 H in the mixed solution 2 SO 4 with H 2 o 2 The volume ratio is 3:1, and then rinse the n-type silicon substrate with deionized water, and dry it with nitrogen for standby;

[0037] (2) Prepare a silicon nanowire array on the upper surface of the n-type silicon substrate: place the n-type silicon substrate obtained in step 1 in a mixed solution of silver nitrate / hydrofluoric acid, wherein the silver nitrate / hydrofluoric acid The molar concentration of hydrofluoric acid in the acid mixed solution is 4.8mol / l, and the molar c...

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Abstract

The invention provides a solar cell and a preparation method thereof. The preparation method of the solar cell comprises the steps of cleaning an n-type silicon substrate; preparing a silicon nanowirearray on an upper surface of the n-type silicon substrate; performing passivation on the n-type silicon substrate; preparing a cobalt sulfide nanowire / P3HT layer; preparing PEDOT:PSS; preparing a front-surface silver gate; and preparing a back-surface aluminum electrode. In the process of performing passivation on the n-type silicon substrate, a mixed solution containing sodium hydroxide and silicon propoxide is selected and spin-coated, annealing is performed, the defect state of a surface of the silicon substrate is effectively reduced, and the photoelectric conversion efficiency of the corresponding solar cell is improved.

Description

technical field [0001] The invention relates to the technical field of photoelectric conversion, in particular to a solar cell and a preparation method thereof. Background technique [0002] Throughout the hundred years of solar cell development, various solar cells have emerged. In terms of the development time of solar cells, solar cells can be divided into three categories: the first generation of solar cells specifically includes monocrystalline silicon solar cells. Silicon solar cells such as batteries, polycrystalline silicon solar cells, and amorphous silicon solar cells; second-generation solar cells specifically include amorphous silicon thin-film solar cells, gallium arsenide solar cells, cadmium telluride solar cells, and copper indium gallium selenide solar cells, etc. Thin-film solar cells; the third-generation solar cells specifically include dye-sensitized solar cells and nanocrystalline solar cells. New solar cells such as organic solar cells, organic-inorga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/0216H01L31/0236
CPCH01L31/02167H01L31/02363H01L31/18Y02E10/549H10K85/1135H10K85/113H10K30/352H10K71/00
Inventor 郑伟
Owner 南通鸿图健康科技有限公司
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