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Preparation method and application of active layer of organic photovoltaic device

A technology of organic photovoltaic devices and active layers, which is applied in semiconductor/solid-state device manufacturing, photovoltaic power generation, and electric solid-state devices. The effect of thin film morphology and performance, short preparation cycle and low preparation difficulty

Active Publication Date: 2021-08-10
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are inherent defects in the morphology of bulk heterojunctions (Advanced Energy Materials 2016, 6, 1600699), which usually need to be achieved by thermal annealing, solvent annealing, or chemical solvent additives, etc. The process is complex and poorly controllable, especially It is difficult to control the shape and ensure the repeatability of the shape when it is prepared in a large area, which is not conducive to industrial production

Method used

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  • Preparation method and application of active layer of organic photovoltaic device
  • Preparation method and application of active layer of organic photovoltaic device
  • Preparation method and application of active layer of organic photovoltaic device

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 1) Weigh 8.2 mg of polymer donor PM6 and dissolve it in 1 ml of chloroform solvent to obtain a PM6 solution with a concentration of 8.2 mg / ml;

[0035] 2) Weighing 8 mg of the small molecule receptor Y6 solution and dissolving it in 1 ml of chloroform solvent to obtain a Y6 solution with a concentration of 8 mg / ml;

[0036] 3) Prepare several filter paper scrapers with a width of 1 cm;

[0037] 4) Prepare PEDOT:PSS film layer on the cleaned ITO substrate;

[0038] 5) Scrape PM6 solution on the PEDOT:PSS layer, adjust the contact between the scraper and the substrate, the liquid supply flow rate is 15 μl / min, and the scraping speed is 3mm / s;

[0039] 6) Replace the scraper, continue to scrape the Y6 solution on the donor PM6 layer, adjust the contact between the scraper and the substrate, the flow rate of the liquid supply is 10 μl / min, and the scraping speed is 2mm / s, and finally a planar diffusion heterojunction organic active layer.

[0040] 7) Prepare the electron...

Embodiment 2

[0043] 1) Weigh 5 mg of polymer donor PTQ10 and dissolve it in 1 ml of chloroform / o-xylene mixed solvent to obtain a PTQ10 solution with a concentration of 5 mg / ml;

[0044] 2) Weighing 6 mg of the small molecule receptor Y6-BO and dissolving it in 1 ml of chloroform / o-xylene mixed solvent to obtain a Y6-BO solution with a concentration of 6 mg / ml;

[0045] 3) Prepare several flexible microstructure cloth scrapers with a width of 1 cm;

[0046] 4) Prepare PEDOT:PSS film layer on the cleaned ITO substrate;

[0047] 5) Scrape-coat PTQ10 solution on the PEDOT:PSS layer, adjust the contact between the scraper and the substrate, the substrate temperature is 70°C, and the scraping speed is 25mm / s;

[0048] 6) Replace the scraper, continue to scrape the Y6-BO solution on the donor PTQ10 layer, adjust the contact between the scraper and the substrate, the substrate temperature is 70°C, and the scraping speed is 35mm / s, and finally a planar diffusion heterojunction organic active lay...

Embodiment 3

[0053] Embodiment 3 is the same as the preparation method of the active layer and the organic solar cell device prepared from this active layer in embodiment 2, and the difference is that in step 1) and step 2), the donor and acceptor materials are independently adjacent Xylene solvent is dissolved, and concrete step 1) and step 2) are as follows:

[0054] 1) Weigh 5 mg of polymer donor PTQ10 and dissolve it in 1 ml of o-xylene solvent to obtain a PTQ10 solution with a concentration of 5 mg / ml;

[0055] 2) Weighing 6 mg of the small molecule receptor Y6-BO and dissolving it in 1 ml of o-xylene solvent to obtain a Y6-BO solution with a concentration of 6 mg / ml;

[0056] Step 3)-step 8) in this embodiment are exactly the same as Embodiment 2.

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Abstract

The invention discloses a preparation method and application of an organic photovoltaic device active layer. The prepared organic photovoltaic device active layer comprises a donor layer, a donor-acceptor blending layer and an acceptor layer which are sequentially stacked from bottom to top, wherein the donor layer and the acceptor layer are prepared layer by layer through a flexible microstructure blade coating method, and the donor-acceptor blending layer is formed by mutual diffusion of donor molecules and acceptor molecules near an interface in the low-temperature annealing process. The method has the advantages that the acceptor material and the donor material use the same solvent to prepare the active layer layer by layer, the material utilization rate is close to 100%, material waste and environmental pollution are reduced, controllability and repeatability are high, the method can be applied to preparation of organic solar cell devices, the prepared organic solar cell devices are stable in property, and the method is suitable for large-scale production. and the method is suitable for large-area production.

Description

technical field [0001] The invention relates to the technical field of organic photovoltaic devices, in particular to a preparation method and application of an active layer of an organic photovoltaic device. Background technique [0002] Organic photovoltaic cells can be prepared by low-temperature solution method, easy to realize large-area and low-cost roll-to-roll printing, and are considered as one of the most promising photovoltaic technologies. Organic photovoltaic cells use organic materials as the photosensitive active layer and do not contain toxic heavy metal ions such as lead. The photoelectric conversion efficiency of small-area organic photovoltaic devices based on bulk heterojunction structures in the laboratory has reached 18.22% (Science Bulletin 2020, 65, 272-275) , becoming the next-generation photovoltaic technology that attracts attention. However, there are inherent defects in the morphology of bulk heterojunctions (Advanced Energy Materials 2016, 6, 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/42
CPCH10K71/12H10K30/20Y02E10/549Y02P70/50
Inventor 李永哲邓玲玲赵新彦邓巍巍
Owner NANJING UNIV OF POSTS & TELECOMM
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