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Organic solar cell processed by non-halogen solvent and based on polythiophene system and preparation method of organic solar cell

A technology of organic solar cells and polythiophene, which is used in semiconductor/solid-state device manufacturing, circuits, electrical components, etc., can solve problems such as difficult processing, and achieve the effect of reducing toxicity, promoting commercialization, and maintaining device performance.

Pending Publication Date: 2022-08-09
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to improve the problem that most of the existing high-efficiency polythiophene systems use highly toxic halogen solvents in the solution processing process, and are difficult to process in conventional non-halogen solvents, the present invention provides a polythiophene-based system prepared by processing non-halogen solvents A method for high-efficiency organic solar cells, so as to achieve the result of reducing solvent toxicity during processing, and further adapt to the conditions of commercial production

Method used

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  • Organic solar cell processed by non-halogen solvent and based on polythiophene system and preparation method of organic solar cell
  • Organic solar cell processed by non-halogen solvent and based on polythiophene system and preparation method of organic solar cell
  • Organic solar cell processed by non-halogen solvent and based on polythiophene system and preparation method of organic solar cell

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Embodiment 1

[0039] figure 1 It is a schematic structural diagram of an organic solar cell prepared in an embodiment of the present invention. like figure 1 As shown in the figure, the organic solar cell adopts a front-loading structure, from bottom to top, the substrate layer 1, the transparent conductive anode layer 2 (ITO), the hole transport layer 3 (PEDOT:PSS), the active layer 4 (PTVT-T:BTP) -eC9), electron transport layer 5 (PFN-Br), metal cathode 6 (Ag). The device structure is ITO / PEDOT:PSS / PTVT-T:BTP-eC9 / PFN-Br / Ag.

[0040] The specific preparation method of the above-mentioned organic solar cell comprises the following steps:

[0041] (1) the glass substrate coated with the ITO layer is ultrasonically cleaned with isopropanol, detergent, deionized water, isopropanol successively, dried in a drying oven, and placed in a petri dish for subsequent use;

[0042] (2) Spin-coat the PEDOT:PSS solution (purchased from Heraeus Company, the model is Clevios-4083, the other examples us...

Embodiment 2

[0051] The specific preparation method of the device structure of the ITO / PEDOT:PSS / PTVT-T:BTP-eC9 / PFN-Br / Ag organic solar cell includes the following steps:

[0052] (1) the glass substrate coated with the ITO layer is ultrasonically cleaned with isopropanol, detergent, deionized water, isopropanol successively, dried in a drying oven, and placed in a petri dish for subsequent use;

[0053] (2) Spin-coating the PEDOT:PSS solution on the ITO layer as a hole transport layer at a rotational speed of 4000 rpm and a thickness of 40 nm; then thermally annealed at 150° C. for 15 min;

[0054] (3) Mix the polythiophene derivative donor material PTVT-T and the non-fullerene small molecule acceptor BTP-eC9 in a mass ratio of 1:1.2, dissolve in 3-methylthiophene solvent, and prepare the donor concentration 3.6mg·mL -1 The active layer solution was then stirred at 70 °C for 6 h. When preparing the active layer, the active layer solution was heated at 80°C by thermal swirl, and the subs...

Embodiment 3

[0064] The specific preparation method of the organic solar cell comprises the following steps:

[0065] (1) the glass substrate coated with the ITO layer is ultrasonically cleaned with isopropanol, detergent, deionized water, isopropanol successively, dried in a drying oven, and placed in a petri dish for subsequent use;

[0066] (2) Spin-coating the PEDOT:PSS solution on the ITO layer as a hole transport layer at a rotational speed of 4000 rpm and a thickness of 40 nm; then thermally annealed at 150° C. for 15 min;

[0067] (3) Mix the polythiophene crystalline polymer donor material PTVT-T with the non-fullerene small molecule acceptor BTP-eC9 in a mass ratio of 1:1.2, and mix the thiophene solvent and 3-methylthiophene solvent in a volume ratio of 0.7:0.3, 0.5:0.5, 0.3:0.7 were mixed to prepare a series of mixed solvents, and then the donor-acceptor materials were dissolved in each mixed solvent respectively, and the concentration of the donors was 3 mg·mL. -1 , 3.4 mg·mL...

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Abstract

The invention discloses a non-halogen solvent processed organic solar cell based on a polythiophene system and a preparation method thereof, the organic solar cell comprises a substrate and an organic solar cell element, the organic solar cell element comprises an anode, a hole transport layer, an active layer, an electron transport layer and a cathode from bottom to top in sequence; the active layer is a binary mixture of a polythiophene derivative donor and a non-fullerene small molecule receptor. According to the invention, the organic solar cell of a high-efficiency polythiophene system processed by a non-halogen solvent is developed by utilizing the similar and intermiscible characteristic of a thiophene solvent and a polythiophene derivative donor material, the device performance equivalent to that of halogen solvent processing reported in literatures is obtained, and meanwhile, the toxicity generated by the solvent in the processing process is reduced. The technology promotes the commercialization process of the low-cost organic solar cell based on the polythiophene system to a great extent.

Description

technical field [0001] The invention belongs to the technical field of organic optoelectronic devices, and relates to a non-halogen solvent-processed organic solar cell based on a polythiophene system and a preparation method thereof. Background technique [0002] With the rapid development of the world's social economy, people's demand for energy is increasing day by day. Conventional fossil energy is non-renewable and has limited reserves. Moreover, the use of fossil energy has caused environmental problems such as air pollution and greenhouse effect. Solar energy is considered to be one of the new energy sources with great potential due to its clean, environmentally friendly, pollution-free, abundant reserves and wide distribution. Organic solar cells have the advantages of low cost, light material quality, simple solution processing technology, good flexibility, and can be fabricated into large-area flexible devices by printing and inkjet methods, showing great potential...

Claims

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Application Information

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IPC IPC(8): H01L51/46H01L51/48H01L51/42
CPCH10K71/12H10K71/441H10K85/1135H10K85/215H10K30/451Y02E10/549
Inventor 叶轩立杨婕张桂传
Owner SOUTH CHINA UNIV OF TECH
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