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A kind of thick-film organic solar cell based on non-fullerene acceptor and its preparation method

An organic solar cell, non-fullerene acceptor technology, applied in semiconductor/solid-state device manufacturing, circuits, photovoltaic power generation, etc. The effect of light stability, shortening transmission distance and improving power conversion efficiency

Active Publication Date: 2022-05-17
SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, these few reported systems only observed that the decrease in device performance with the increase of the thickness of the active layer was smaller than that of most systems, and did not report the development of a more general method and strategy for realizing effective thick film devices.

Method used

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  • A kind of thick-film organic solar cell based on non-fullerene acceptor and its preparation method
  • A kind of thick-film organic solar cell based on non-fullerene acceptor and its preparation method
  • A kind of thick-film organic solar cell based on non-fullerene acceptor and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0046] (1) Clean the glass substrate coated with the ITO layer with acetone, micron-scale semiconductor special detergent, deionized water, and isopropanol ultrasonically in sequence, dry it with dry nitrogen and place it in a petri dish for later use (in this embodiment, cathode);

[0047] (2) Spin-coat the diethyl zinc solution on the ITO layer and heat it to react with air and water to form ZnO as the electron transport layer, the rotation speed is 5000rpm, and the thickness is about 30nm; place it on a heating table at 180°C for 30min for annealing;

[0048] (3) Mix the polymer donor PffBT4T-2OD and the non-fullerene acceptor EH-IDTBR according to the mass ratio of 1:1.5, dissolve in o-xylene solvent, and prepare the concentrations of 8, 11, and 14 mg mL respectively -1 The mixed solution was stirred at 80°C for 12h; then the mixed solution was spin-coated on the ZnO electron transport layer at a spin-coating rate of 2000rpm to obtain active layers with thicknesses of 100,...

Embodiment 2

[0065] Repeat Example 1, and replace the non-fullerene acceptor with O-IDTBR, whose chemical structural formula is as follows:

[0066]

[0067] Flip-chip devices with different active layer thicknesses were prepared and tested for photovoltaic performance. The results are shown in Table 2.

[0068] Table 2 The performance parameters of flip-chip organic solar cell devices with different active layer (PffBT4T-2OD:O-IDTBR) thicknesses

[0069]

[0070] It can be seen from Table 2 that the efficiency of the flip-chip organic solar cell device in this embodiment does not decrease but rises slightly as the thickness of the active layer increases. The current-voltage curve is shown in Figure 7 . This example further proves that, for an active layer system whose hole mobility is much higher than electron mobility, a high-efficiency thick-film battery device can be obtained by using a flip-chip device structure.

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Abstract

The invention relates to a thick-film organic solar cell based on a non-fullerene acceptor and a preparation method thereof. The organic solar cell sequentially includes a stacked substrate, a transparent electrode, an electron transport layer, an active layer, a hole transport layer, and a back electrode; the active layer is a crystalline polymer as a donor, and a non-fullerene small molecule as an acceptor The binary blend of the active layer has a thickness of 100nm to 300nm. The present invention adjusts the structure of the battery device by changing the stacking sequence of the above layers, and can change the transmission distance of electrons and holes in the thick film battery device during the process of transporting electrons and holes to the cathode and anode respectively for collection. The power conversion efficiency of the organic solar cell prepared by the invention is not sensitive to the thickness of the active layer, and when the thickness of the active layer is 100nm to 300nm, the power conversion efficiency of the device can maintain about 9%. This provides a simple strategy and theoretical guidance for developing more efficient thick-film non-fullerene solar cells.

Description

technical field [0001] The invention belongs to the field of photoelectric devices, and in particular relates to a non-fullerene acceptor-based thick-film organic solar cell and a preparation method. Background technique [0002] Energy, as one of the indispensable and important factors for human survival and development, has always attracted people's attention. Photovoltaic technology, as a method that can convert the inexhaustible sunlight into electrical energy, has received extensive attention. At present, photovoltaic technology based on inorganic materials such as silicon has also been widely used. However, inorganic silicon solar cells are in direct competition with microelectronics industry materials due to their use of materials, and the toxicity of the materials and the instruments and vacuum processes required to produce these materials will cause high production costs, and their heavier mass produces higher production costs. Installation costs and therefore hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K85/113H10K30/152Y02E10/549Y02P70/50
Inventor 叶轩立张桂传
Owner SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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