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A thick-film organic solar cell based on low-temperature preparation of thermal crystallization active layer and its preparation method
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A solar cell and thermal crystallization technology, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as difficult film formation, achieve the effects of simplifying the preparation process, improving carrier mobility and crystallinity, and improving performance
Active Publication Date: 2020-06-05
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0004] Based on the above technical problems, the present invention provides a thick-film organic solar cell based on the preparation of thermal crystallization active layer at low temperature, thereby solving the technical problem that thermal crystallization materials in organic solar cells are difficult to form a film at low temperature in the past
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[0035] like figure 1 As shown, a thick-film organic solar cell based on low-temperature preparation of thermal crystallization active layer, the solar cell adopts an inverted structure, including a substrate layer 1, an ITO transparent conductive cathode layer 2 (ITO, English name) arranged in sequence from bottom to top IndiumTin Oxides (i.e. indiumtinoxide), cathode buffer layer 3, photoactive layer 4, anode buffer layer 5, metal anode layer 6;
[0059] 1. Clean the substrate composed of a transparent substrate layer 1 and an ITO transparent conductive cathode layer 2 with a surface roughness less than 1 nm, and dry it with nitrogen after cleaning;
[0060] 2. Spin-coat ZnO on the surface of the ITO transparent conductive cathode layer 2 (working parameters: speed 5000rpm, time 40s, thickness 15nm, the same below, no further explanation) to prepare the cathode buffer layer 3, and bake the formed film at low temperature (Working parameters: temperature 200°C, time 60min, the same below, no further explanation);
[0061] 3. Prepare PffBT4T-C by spin coating on the cathode buffer layer 3 8 C 12 :PC 71 BM (mass percentage 40%: 60%, the same below, no longer described) photoactive layer 4 (800rpm, 50s, 300nm);
[0062] 4. Spin-coat PEDOT:PSS solution on the surface of photoactive layer 4 to prepare anode buffer layer 5 (3000rpm, 60s, 30nm);
[0063] 5. Evaporating metal anode Ag (100nm) on the ...
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Abstract
The invention relates to a thick-film organic solar cell based on low-temperature preparation of a thermal crystallizationactive layer. The solar cell adopts an inverted structure, including a substrate layer, an ITO transparent conductive cathode layer, a cathode buffer layer, and a photoactive solar cell arranged sequentially from bottom to top. Layer, anode buffer layer, metalanode layer; the photoactive layer is a film structure formed by mixing electron donor material, electronacceptor material and organic insulating material. The weight percentage of electron donor material is: 39-39.5%; electron acceptor The weight percentage of the material is: 58-60%; the weight percentage of the organic insulating material is: 0.5-3%. At the same time, the invention also discloses a preparation method of the thick-film organic solar cell. The organic insulating material mixed in the present invention makes the thermal crystallization material that is easy to agglomerate more uniformly dispersed in the solution, so that the gel-like state of the active layer material at room temperature is transformed into a liquid state, and can be prepared at room temperature, simplifying the preparation process, and effectively Facilitate large-scale production.
Description
technical field [0001] The invention relates to a solar cell, which belongs to the field of new energy solar cells; in particular, it relates to a thick-film organic solar cell based on low-temperature preparation of a thermal crystallizationactive layer; meanwhile, the invention also discloses a preparation method of the thick-film organic solar cell. Background technique [0002] With the rapid growth of global energy demand, human society is facing social problems such as severe energy crisis and environmental degradation. The development of society requires an increasing demand for energy, but the reserves of traditional energy are very limited. At the same time, the use of traditional energy has also caused very serious environmental problems, including hot issues such as air pollution, water pollution, greenhouse effect, and PM2.5. Solar energy, as a renewable energy source, fits the bill. The energy of solar energy reaching the ground every second is as high as 800,...
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