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Method for preparing organic thin-film solar cells

A technology of solar cells and organic thin films, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of difficult product shape, uneven thickness, waste of raw materials, etc., to improve energy conversion efficiency, improve energy conversion efficiency, and improve effective The effect of transmission

Active Publication Date: 2012-08-15
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the commonly used film-forming technologies of organic solar cells are mainly spray coating and spin coating, but the spray coating cannot control the thickness of the film well, and the thickness is not uniform after drying and forming a film; and the products obtained by the spin coating are very It is difficult to shape, and the waste of raw materials is serious; at the same time, the efficiency of the organic solar cells prepared by the current method is still low, which is far from meeting the practical requirements. Therefore, how to use the best device structure and preparation process to break through the polymer The efficiency bottleneck of solar cells is a difficult point in the research of organic solar cells

Method used

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  • Method for preparing organic thin-film solar cells

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Effect test

Embodiment 1

[0023] Step 1, on the substrate that has been treated, a mixed aqueous solution of poly(3,4-ethylenedioxythiophene) and poly(styrenesulfonate) with a concentration of 0.3% is brushed, wherein poly(3,4- The mass ratio of ethylene dioxythiophene) and poly(styrene sulfonate) is 1:1.6. Brushing rate 0.5cm / s, 80 o Bake at C for 1 hour to obtain a hole transport layer with a thickness of 30 nm.

[0024] Step 2, poly(3-hexylthiophene) (P3HT), one of the polythiophene derivatives, and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), one of the fullerene derivatives, were : 0.8 ratio mixed to prepare a concentration of 5mg / ml chloroform solution. Brush the mixed solution of P3HT and PCBM prepared above on the conductive substrate covered with the hole transport layer, the brushing rate is 0.5cm / s, dry under an inert atmosphere, remove excess chloroform, and obtain a 60nm thick power generation layer film .

[0025] Step 3, put the above-mentioned substrate into a vacuum sputterin...

Embodiment 2

[0028] Step 1, on the substrate that has been treated, a mixed aqueous solution of poly(3,4-ethylenedioxythiophene) and poly(styrenesulfonate) with a concentration of 0.8% is brushed, wherein poly(3,4- The mass ratio of ethylene dioxythiophene) and poly(styrene sulfonate) is 1:1.6. Brushing rate 0.5cm / s, 90 o Bake at C for 1 hour to obtain a hole transport layer with a thickness of 35 nm.

[0029] Step 2, poly(3-hexylthiophene) (P3HT), one of the polythiophene derivatives, and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), one of the fullerene derivatives, were : 0.9 ratio mixed to prepare a concentration of 8mg / ml chloroform solution. Brush the mixed solution of P3HT and PCBM prepared above on the conductive substrate covered with the hole transport layer, the brushing speed is 0.5cm / s, and it is heated to 60°C under an inert atmosphere. o C, removing excess chloroform to obtain an 80nm thick power generation layer film.

[0030] Step 3, put the above-mentioned substr...

Embodiment 3

[0033] Step 1, on the substrate that has been treated, a mixed aqueous solution of poly(3,4-ethylenedioxythiophene) and poly(styrenesulfonate) with a concentration of 1.0% is brushed, wherein poly(3,4- The mass ratio of ethylene dioxythiophene) and poly(styrene sulfonate) is 1:1.6. Brushing rate 1cm / s 100 o Bake at C for half an hour to obtain a hole transport layer with a thickness of 50 nm.

[0034] Step 2, poly(3-hexylthiophene) (P3HT), one of the polythiophene derivatives, and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), one of the fullerene derivatives, were : 1 ratio to prepare a chloroform solution with a concentration of 10mg / ml. Brush the mixed solution of P3HT and PCBM prepared above on the conductive substrate covered with the hole transport layer, the brushing speed is 1cm / s, and it is heated to 60°C under an inert atmosphere. o C, removing excess chloroform to obtain a 100nm thick power generation layer film.

[0035] Step 3, put the above-mentioned subs...

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Abstract

The invention discloses a method for preparing organic thin-film solar cells, and the method comprises the following steps: after a transparent conductive substrate is cleaned, drying the transparent conductive substrate by using nitrogen, brushing a poly (3,4-ethylenedioxythiophene)-poly(styrenesulfonate) mixed aqueous solution on the transparent conductive substrate, and placing the obtained transparent conductive substrate in an oven to heat and dry so as to obtain a conductive substrate coated with a hole transport layer; brushing a mixed solution of donor materials and acceptor materials on the conductive substrate coated with a hole transport layer, controlling the thickness of a thin film of a power generation layer to be 30-200 nm through regulating the concentration of the mixed solution of donor materials and acceptor materials and the speed of a brush passing across the substrate; and putting the obtained transparent conductive substrate into a vacuum sputtering film-plating machine, sequentially evaporating a LiF layer and a metal cathode layer, and packaging the obtained product at room temperature so as to obtain an organic solar cell. According to the invention, the simplification and high efficiency of solar cell production can be realized.

Description

technical field [0001] The invention relates to the field of preparation of thin-film solar cells, in particular to a preparation method of organic thin-film solar cells. Background technique [0002] The development of clean and renewable energy is the primary way to solve the world's energy crisis. Solar energy accounts for more than 99% of the earth's total energy and is an important renewable energy. Solar cells based on the photovoltaic effect are one of the important ways to develop and utilize solar energy at present. Although silicon-based solar cells have been industrialized, traditional solar module cells are about three to four times more expensive than petroleum energy in terms of cost performance. At the same time, it must be processed into a plate shape, which limits some of its daily applications. Organic solar cells are most likely to achieve the goals of cheap, efficient, flexible and large-area solar cells due to their simple manufacturing process, flexi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48
CPCY02E10/549Y02P70/50
Inventor 马磊刘香兰田兴友史同飞曾雪松
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI