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Preparation method for positive electrode interface material of polymer thin film solar cell

A technology for solar cells and polymer films, applied in the field of solar cells, can solve problems such as water absorption affecting device stability, corrosion, and inability to form ohmic contacts, achieve excellent photovoltaic performance, increase hole collection efficiency, and reduce holes The effect of the output barrier

Inactive Publication Date: 2015-06-10
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anode work function after PEDOT:PSS modification is around -5.2eV, which does not match the highest occupied orbital (HOMO) of many new polymer donors, and cannot form an ohmic contact, which affects the anode’s hole collection efficiency, thus hindering Improved photovoltaic performance of the device
On the other hand, due to the acidity of PEDOT:PSS, it has a certain corrosion effect on the metal oxide (such as ITO) anode, which is not conducive to the long-term operation of photovoltaic devices; at the same time, its water absorption is the main factor affecting the stability of the device.

Method used

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  • Preparation method for positive electrode interface material of polymer thin film solar cell
  • Preparation method for positive electrode interface material of polymer thin film solar cell
  • Preparation method for positive electrode interface material of polymer thin film solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] First, copper oxide nanoparticles were prepared by ultrasonic method, the specific steps are as follows:

[0053] (1) preparation concentration is the ethanol solution of the cupric chloride of 0.001 mol / liter;

[0054] (2) Adding 25% tetramethylammonium hydroxide by mass fraction therein to form a copper hydroxide suspension. Continue to stir the suspension for 40 minutes to ensure that the pH value of the solution does not change;

[0055] (3) Using a titanium rod with a diameter of 6 mm, apply 300 watts of energy to the suspension in the form of ultrasound for 40 minutes;

[0056] (4) The resulting suspension is centrifuged, then dispersed in ethanol, and prepared into an ethanol sol of copper oxide nanoparticles at a desired concentration.

[0057] Then, the mixed solution of the polymer and the fullerene derivative was prepared as follows: In an inert atmosphere glove box, 4 mg of poly[nitrogen-(1-octylnonyl)-2,7-carbazole-alternate-5 , 5-(4′,7′-bis-2-thienyl-2′...

Embodiment 2

[0066] The preparation method of the copper oxide nanoparticles and the polymer solar cell is the same as that in Example 1, except that the rotational speed of the ethanol sol of the copper oxide nanoparticles is spin-coated at 400 rpm, and the thickness of the obtained film is 50 nanometers. Obtain polymer film solar cell, its device structure is: ITO (120nm) / copper oxide nanoparticle film (50nm) / PCDTBT:PC 70 BM(70nm) / LiF(1nm) / Al(80nm). The battery has an active area of ​​16 square millimeters. Treat in a UV-ozone atmosphere for 10 minutes.

[0067] Test its current-voltage characteristic curve under 100 mW / cm2 AM 1.5G simulated sunlight, such as image 3 As shown in curve 2, its performance parameters are shown in Table 1.

Embodiment 3

[0069] The preparation method of the copper oxide nanoparticles and the polymer solar cell is the same as that in Example 1, except that the rotating speed of the ethanol sol of the copper oxide nanoparticles is spin-coated at 2500 rpm, and the thickness of the obtained film is 5 nanometers. Obtain polymer film solar cell, its device structure is: ITO (120nm) / copper oxide nanoparticle film (5nm) / PCDTBT:PC 70 BM(70nm) / LiF(1nm) / Al(80nm). The battery has an active area of ​​16 square millimeters. Treated in an ultraviolet ozone atmosphere for 30 minutes.

[0070] Test its current-voltage characteristic curve under 100 mW / cm2 AM 1.5G simulated sunlight, such as image 3 As shown in curve 3, its performance parameters are shown in Table 1.

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Abstract

The invention relates to a preparation method for a positive electrode interface material of a polymer thin film solar cell and belongs to the technical field of the solar cell. A positive electrode interface layer is composed of copper oxide nanoparticles prepared by an ultrasonic preparation method. The capability for transferring and collecting the charge of the copper oxide thin film is improved after the ultraviolet and ozone treatment. The more excellent performance can be achieved by a device adopting the copper oxide nanoparticle thin film as the positive electrode interface layer, and the power conversion efficiency is improved to 6.44% from 6.00%. The preparation method for copper oxide nanoparticle thin film has the advantages that the preparation method is simple in technology, low in cost and high temperature treatment is not needed, and the poor device stability caused by the PEDOT: PSS interface layer is solved. The copper oxide nanoparticle thin film can be used for replacing PEDOT: PSS completely and further applied to the field of the polymer thin film solar cell as the positive electrode interface material.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a preparation method of an anode interface material of a polymer film solar cell. Background technique [0002] With the aggravation of energy crisis and environmental pollution, people pay more and more attention to new clean energy. Among them, solar cells, as a device that directly converts solar energy into electrical energy by utilizing the photovoltaic effect, have been developed on a global scale on a large scale. Compared with inorganic solar cells, organic polymer solar cells have the advantages of solution processing, low cost, easy large-area processing, and flexible devices, so they have received extensive attention. The most common structure of polymer solar cells is the bulk heterojunction structure proposed by Yu et al. A "sandwich structure" is formed between the conductive metal oxide anode and the metal cathode. People improve the molecular st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/46H01L51/48
CPCY02E10/549
Inventor 谢志元张军付莹莹吴江
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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