Surface-modified zinc oxide film, organic solar cell and preparation method thereof

A zinc oxide thin film and solar cell technology, applied in zinc oxide/zinc hydroxide, circuits, photovoltaic power generation, etc., can solve the problems of poor battery stability, complex methods and processes, and low battery performance, and achieve low cost, simple process, The effect of reducing the number of

Active Publication Date: 2021-08-24
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the ZnO film prepared by the solution method, due to the residue of reactants in the reaction process, the prepared ZnO film has many surface defects, resulting in low battery performance.
In addition, recent research results have shown that in the high-performance non-fullerene active layer system, there is a photochemical reaction between zinc oxide and the active layer, which leads to the degradation of the active layer and the poor stability of the battery (Adv.Mater.2019 )
Corresponding studies have shown that the selective formation of self-assembled monolayers on the surface of ZnO thin films can effectively improve the stability of organic solar cells with fullerenes as the main body of fused ring structural units (Adv.Energy. Mater.2019, 9, 190087) However, the method of surface monomolecular layer treatment on the surface of zinc oxide is relatively complicated

Method used

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  • Surface-modified zinc oxide film, organic solar cell and preparation method thereof
  • Surface-modified zinc oxide film, organic solar cell and preparation method thereof
  • Surface-modified zinc oxide film, organic solar cell and preparation method thereof

Examples

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preparation example Construction

[0028] One aspect of the embodiments of the present invention provides a method for preparing a surface-modified zinc oxide film, which includes:

[0029] Modifying the zinc oxide nanoparticle film with a weakly acidic solution, the acidic substances contained in the weakly acidic solution include any one or a combination of two or more of phenylthiol, acetate and biomass acidic compounds .

[0030] In some more specific embodiments, the acetate includes any one or a combination of two or more of zinc acetate, zirconium acetate, copper acetate, and sodium acetate, but is not limited thereto.

[0031] Further, the phenylthiol includes one or a combination of phenylethanethiol and 1,2-benzenedithiol, but is not limited thereto.

[0032] Further, the biomass acidic compound includes any one or a combination of two or more of vitamin C, lactic acid, tartaric acid, and amino acids, but is not limited thereto.

[0033] In some more specific embodiments, the performance and stabili...

Embodiment 1

[0068] Embodiment 1: the preparation of phenylethyl thiol (PEDT) methanol solution treatment zinc oxide thin film 10s and PM7:IT-4F organic solar cell

[0069] (1) Preparation of surface-modified zinc oxide film

[0070] Preparation of ZnO nanoparticles: Weigh 0.66g of zinc acetate dihydrate in a 250mL three-neck flask, add 30mL of dimethylsulfoxide (DMSO) and stir to dissolve; weigh 0.9g of tetramethylammonium hydroxide (TMAH) and Mix 10mL of ethanol, ultrasonicate for 5min until it is completely dissolved, add the ethanol solution of TMAH dropwise with a constant pressure funnel, the dropping time is about 5min, continue to stir for 1h after the dropwise addition is completed, after the reaction, add 125mL of acetone, and continue stirring until The precipitation is complete, and the precipitation obtained by filtration is zinc oxide nanoparticles;

[0071] Preparation of ZnO dispersion: Dissolve the above-mentioned ZnO nanoparticles in 125 mL of acetone and let stand overn...

Embodiment 2

[0103] Embodiment 2: the preparation of phenylethyl thiol (PEDT) methanol solution treatment zinc oxide thin film 10s and PM6:IT-4F organic solar cell

[0104] (1) The preparation of the surface-modified zinc oxide film is the same as in Example 1;

[0105] (2) Preparation of PM6:IT-4F organic solar cells (non-fullerene acceptor group)

[0106] Firstly, use detergent, deionized water, acetone and isopropanol to ultrasonically clean the substrate composed of transparent substrate and indium tin oxide (ITO) transparent conductive bottom electrode, each cleaning time is 30min, and then use nitrogen gas After the substrate is dried, the substrate is treated with a UVO ozone cleaner for 30 minutes;

[0107] Preparation of the electron transport layer on the bottom electrode: the ethanol dispersion of zinc oxide nanoparticles is spin-coated on the bottom electrode with a zinc oxide film with a thickness of 30nm, the spin-coating speed is 3000rpm, and the temperature is dried at 130...

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Abstract

The invention discloses a surface-modified zinc oxide film, an organic solar cell and a preparation method thereof. The surface-modified zinc oxide film is mainly prepared by performing surface modification on a zinc oxide nano-particle film with phenyl mercaptan, acetate, a biomass acidic compound and the like; wherein the organic solar cell comprises a top electrode layer, a hole transport layer, an organic active layer, an electron transport layer, a bottom electrode and the like, and the electron transport layer comprises the surface-modified zinc oxide film. The preparation method of the surface-modified zinc oxide film is simple in process and low in cost, the compatibility of a roll-to-roll printing process can be realized, and the surface-modified zinc oxide film can be used as an electron transport layer of a solar cell, so that the solar cell has the advantages of excellent device performance, relatively long service life and the like.

Description

technical field [0001] The invention belongs to the field of optoelectronic device preparation, and in particular relates to a surface-modified zinc oxide thin film and a preparation method thereof, as well as the application of the surface-modified zinc oxide thin film in optoelectronic devices such as organic solar cells. Background technique [0002] Compared with silicon-based solar cells and inorganic semiconductor solar cells, organic solar cells (OSCs) have the advantages of low cost and light weight. The thickness of the active layer of OSCs is generally 100-200nm, with translucent characteristics, and can be adjusted by adjusting the donor , Acceptor energy bands to obtain thin films of different colors, has received extensive attention in recent years. Especially with the emergence of non-fullerene acceptors, the voltage loss of non-fullerene organic solar cells (NF OSCs) has been reduced, and the photoelectric conversion efficiency of OSCs has been continuously re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02H01L51/42
CPCC01G9/02C01P2002/85H10K30/152Y02E10/549Y02P70/50
Inventor 韩云飞刘博文潘伟闫翎鹏骆群马昌期
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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