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Solar cell and preparation method thereof

A technology of solar cells and conductive layers, applied in the field of solar cells, can solve the problems of low short-circuit current, low photoelectric conversion efficiency, low carrier mobility, etc. Photoelectric conversion efficiency, the effect of improving transmission efficiency

Active Publication Date: 2012-02-01
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to achieve commercialization, the photoelectric conversion efficiency of organic solar cells is still low, and the stability of the device needs to be further improved.
The main reasons for the low photoelectric conversion efficiency of organic solar cells are: the absorption spectrum of the conjugated polymer does not match the solar spectrum, and the utilization rate of sunlight is low; in addition, in bulk heterojunction organic solar cells, Due to the increase of heterojunction interfaces, the excitons generated after the active material absorbs sunlight can quickly dissociate to form free electrons and holes. However, compared with inorganic semiconductors, the carrier mobility in organics is relatively low, and most The carriers in the organic solar cell have not yet had time to be transported to the two electrodes of the battery, and recombination has already occurred, which leads to a loss of current, making the short-circuit current of the organic solar cell lower, and its photoelectric conversion efficiency is also low.

Method used

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  • Solar cell and preparation method thereof
  • Solar cell and preparation method thereof
  • Solar cell and preparation method thereof

Examples

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preparation example Construction

[0039] The solar cell of above-mentioned structure, its preparation method comprises the following steps:

[0040] (1) Clean the substrate to make the surface of the substrate clean and increase its surface adhesion;

[0041] (2) Deposit a certain thickness of conductive electrodes on the back of the above-mentioned substrate, but not limited to using methods such as vacuum evaporation, magnetron sputtering, chemical vapor deposition, etc., to deposit a certain thickness of conductive electrodes on the back of the above-mentioned substrate. Metals such as aluminum, magnesium, gold, silver and their alloys are then annealed in a protective atmosphere to form ohmic contact electrodes;

[0042] (3) In a vacuum chamber, semiconductor nanopillar arrays can be prepared on the above substrate by methods such as chemical vapor deposition, inductively coupled plasma etching, electron beam exposure, electron beam evaporation, and low-temperature vacuum sputtering;

[0043] (4) Vacuum c...

Embodiment 1

[0049] (1) the ZnO substrate is 0.5% H in the mass percentage concentration 2 o 2 Soak in the mixed solution with ammonia water for 5 minutes, then ultrasonic treatment for 10 minutes, wash with deionized water and dry for later use;

[0050] (2) Deposit 10 μm thick metal copper on the back of the substrate by chemical vapor deposition, and then perform annealing treatment at 450° C. for 40 minutes under a protective atmosphere to form a metal copper electrode with ohmic contact;

[0051] (3) In a vacuum chamber, electron beam evaporation is used to prepare In-Zn-O nanocolumn arrays on the ZnO substrate material. The average diameter of the nanocolumns is 100nm, the height is 1000nm, and the spacing between the columns is 100nm;

[0052] (4) Prepare a chlorobenzene solution with a mass ratio of P3HT and PCBM of 4:1, uniform mixing, and a total concentration of 15 mg / ml, fill the mixed solution into the gap formed by the semiconductor nanopillar array, and dry it after self-as...

Embodiment 2

[0057] (1) The AlN substrate was mixed with 0.5% H 2 o 2 Soak in the mixed solution with ammonia water for 5 minutes, then ultrasonic treatment for 10 minutes, wash with deionized water and dry for later use;

[0058] (2) Deposit metal aluminum with a thickness of 5 μm on the back surface of the substrate by vacuum evaporation, and then perform annealing treatment at 350° C. for 20 minutes under a protective atmosphere to form an ohmic-contact metal aluminum electrode;

[0059] (3) In a vacuum chamber, the self-chemical vapor deposition method is used to prepare an array of AlN material nanocolumns on an AlN substrate. The average diameter of the nanocolumns is 30nm, the height is 100nm, and the spacing between the columns is 30nm;

[0060] (4) Using the vacuum co-evaporation method, 4G1-3S and PCBM are filled in the gap formed by the semiconductor nanocolumn array at a mass ratio of 1:1, and then plasma treatment is performed to make the organic material and the semiconducto...

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Abstract

The invention belongs to the field of solar cells, which discloses a solar cell. The solar cell has the following structure: a conducting layer performing the action of electrodes, a substrate, a nanometer column array formed by a semiconductor compound material, an optical activity material filling material, and a transparent conducting electrode layer and a protective electrode. The invention also discloses a preparation method of the solar cell. The solar cell provided by the invention is characterized in that the short circuit current of the solar cell is increased because of the semiconductor nanometer column array so as to improve the photoelectric conversion efficiency. Meanwhile, because the nanometer column array is filled with an organic active material, the periodic structure forms a photonic crystal structure, sunlight which is too late to be absorbed by the photoactive organic material can be irradiated again on the organic material by the reflecting action of the photonic crystal structure, and adsorption on the sunlight by the organic material is enhanced so as to improve the photoelectric conversion efficiency thereof.

Description

technical field [0001] The invention relates to a solar cell, in particular to a solar cell with a photoactive layer containing an organic / inorganic hybrid structure. The invention also relates to a method for preparing the solar cell. Background technique [0002] With the rapid development of the global economy, the consumption of energy has increased sharply. The huge use of fossil fuels has not only caused the depletion of non-renewable resources such as coal, oil, and natural gas, threatening the energy security of human society, but also a large amount of carbon dioxide emissions. It has caused increasingly serious social and environmental problems. In this situation, there is an urgent need to develop and utilize clean energy with both economic performance and high performance. Among them, solar energy is regarded as one of the available, most promising, and renewable energy sources, which has attracted people's attention. [0003] Solar energy utilization schemes ...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCY02E10/549
Inventor 周明杰时朝璞马文波
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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