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Organic solar cell comprising nano-bump structure and manufacturing method therefor

An organic photovoltaic cell and nano-concave-convex technology, which is applied in photovoltaic power generation, organic semiconductor devices, circuits, etc., can solve problems such as unsatisfactory organic photovoltaic cells, uncontrollable spacing of nanoparticles, complex nanostructure mask exposure or transmission process, etc. , to achieve the effect of enhanced surface plasmon effect, increased photocurrent, and improved photovoltaic efficiency

Active Publication Date: 2016-05-18
SEOUL NAT UNIV R&DB FOUND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to this size limitation, the size of nanoparticles and the spacing between particles cannot be controlled, so there is a limit to obtain optical effects
[0012] From an economical point of view, organic photovoltaic cells with nanoscale periodic structures are not ideal because complex exposure or transport processes through a nanostructure mask are required to form this periodic structure.

Method used

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  • Organic solar cell comprising nano-bump structure and manufacturing method therefor
  • Organic solar cell comprising nano-bump structure and manufacturing method therefor
  • Organic solar cell comprising nano-bump structure and manufacturing method therefor

Examples

Experimental program
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Effect test

example 1 to example 3

[0070] ITO had a thickness of 150 nm, and was formed by sputtering on a glass substrate having a size of 25 mm x 25 mm and a thickness of 0.7 mm. Silver nanoparticles were bound to the ITO surface as a dry aerosol by an evaporation / condensation process with a size of about 20 nm (Example 1). The molybdenum trioxide is arranged on the exposed part of the silver nanoparticles and the ITO electrode, and the thickness is 20nm, and the molybdenum trioxide and the silver nanoparticles form a nano concave-convex structure. Subsequently, the mixture of PCDTBT and PC70BM (mass ratio 1:4) was spin-coated on the nano-concave-convex structure with a thickness of 90nm, and then lithium fluoride (LIF) and Al To form an electrode, and finally complete the organic photovoltaic cell structure. Organic photovoltaic cell structures were prepared in the same manner as in Example 1, except that the size of the silver nanoparticles was 40 nm (Example 2) and 60 nm (Example 3).

[0071] The evapora...

experiment example 1

[0077] Figure 4a , 4b FE-SEM images (x50,000 magnified image, analysis area 6.0 μm × 4.2 μm) of silver nanoparticles with different sizes (20, 40, and 60 nm) are shown in and 4c, respectively, which show that silver nanoparticles of different sizes The nanoparticles are uniformly and randomly dispersed with a small standard deviation. All analyzes were performed using ImageJ software version 1.46r.

experiment example 2

[0079] J-V characteristics and power conversion efficiencies in the structures prepared in Examples 1, 2 and 3 and Comparative Example 1 were measured under AM1.5G illumination intensity (100 mW / cm2). The result is as Figure 5a with 5b Shown, and the average value is shown in Table 1:

[0080] Table 1:

[0081]

[0082] From Table 1 and Figure 5a with 5b It can be seen that the power conversion efficiency of the structures prepared in Examples 1 to 3 is about 9.5% to 17.6% higher than that of Comparative Example 1. Higher conversion efficiency is used to improve short circuit current (Jsc). The above results indicate that the higher conversion efficiency is due to the enhanced surface plasmon effect induced by the nano-concave-convex structure composed of nanoparticles and covered nanostructures, and the enhanced light absorption due to the uneven structure of the active layer.

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Abstract

Provided is an organic solar cell comprising: a first electrode layer formed on a substrate; metal nanoparticles adhered to the first electrode layer; a hole transfer layer having a nano-bump structure, the hole transfer layer being formed on the metal nanoparticles; a photoactive layer formed on the hole transfer layer; and a second electrode formed on the photoactive layer. The organic solar cell contains the metal nanoparticles on the electrode, and the hole transfer layer formed thereon has a nano-bump structure whereby an increased plasmonic effect is produced, resulting in increased photoelectric current. Further, the photoactive layer has a concavo-convex structure, which increases light absorption so that optical efficiency can be improved. In addition, it is possible to form the nano-bump structure using a simple dry aerosol process without a complex exposing process or transferring process, thereby significantly improving economic efficiency.

Description

technical field [0001] The invention relates to an organic photovoltaic cell with a nano-concave-convex structure and a preparation method thereof, in particular to an organic photovoltaic cell with a nano-concave-convex structure that can enhance surface plasmon effect and light absorption efficiency to improve photovoltaic conversion rate and prepare an organic photovoltaic cell Methods. Background technique [0002] The rise in oil prices is due to the increase in global consumption of fossil fuels, and the growing demand for alternative energy sources has also led to environmental concerns such as global warming. [0003] Solar cell technology is an inexhaustible energy source that uses solar energy to generate electricity. Among various renewable energy technologies, solar cell power generation has always attracted attention. At present, a large part of solar cells are inorganic silicon solar cells, which have high commercial value, but their raw materials are expensiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42
CPCY02E10/549Y02P70/50H10K85/215H10K85/621H10K30/81H10K30/35H10K30/50H10K30/87H10K30/82H10K2102/00H10K2102/101H10K2102/102H10K2102/103
Inventor 宋炯俊郑祈男李建熙高荣晙李种权李昌熙崔万秀
Owner SEOUL NAT UNIV R&DB FOUND
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