Porphyrin small molecule perovskite cathode buffer layer material, preparation method and applications thereof

A cathode buffer layer and perovskite technology, applied in semiconductor/solid-state device manufacturing, photovoltaic power generation, electrical components, etc., can solve problems such as high production cost, low photoelectric conversion efficiency, and high energy consumption

Active Publication Date: 2018-03-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

One is traditional silicon-based batteries. Silicon-based batteries have excellent properties such as high photoelectric conversion efficiency, long life, and good stability. However, silicon-based batteries also have disadvantages such as high production costs, high energy consumption, and high pollution during the production process; the second is quantum dot solar cells. Battery, quantum dot solar cell is a new type of solar cell developed by combining nanotechnology and quantum mechanics theory. It has excellent properties such as flexibility and solution processing. However, the photoelectric conversion efficiency of quantum dot solar cell devices is not high at present. The improvement of efficiency is also very slow; the third is dye-sensitized solar cells. Dye-sensitized solar cells are a kind of solar cells developed by imitating the principle of photosynthesis. They have long life, simple structure, easy manufacture, and less energy consumption for preparing cells. , non-toxic and non-polluting in the production process, but the use of liquid electrolyte in the battery structure has become the most fatal shortcoming of dye-sensitized solar cells; the fourth is organic solar cells, organic solar cells also have simple structure of dye-sensitized cells, Easy to manufacture, less energy consumption to prepare batteries, etc., and does not use electrolyte, it is a kind of solar cell with broad prospects; the fifth is perovskite solar cells, perovskite solar cells, which have rich raw materials and can be processed by solution. Low processing cost and other excellent properties. At the same time, the battery efficiency has increased to more than 20% in less than 8 years, which is generally optimistic in the industry. However, at present, perovskite solar cells also have shortcomings such as not being resistant to water vapor, and the battery efficiency is seriously attenuated. , we believe that with the in-depth research on perovskite solar cells, these shortcomings can be gradually overcome

Method used

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  • Porphyrin small molecule perovskite cathode buffer layer material, preparation method and applications thereof
  • Porphyrin small molecule perovskite cathode buffer layer material, preparation method and applications thereof
  • Porphyrin small molecule perovskite cathode buffer layer material, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] (1) Synthesis of 5,15-bis(5-(2-butyl)thiophene-2-octane)porphyrin

[0065] The reaction equation is as follows:

[0066]

[0067] In a 2L three-neck round-bottomed flask, add thiophenealdehyde (4.2g, 15.0mmol), bipyrromethane (2.19g, 15.0mmol) and 1.5L of dichloromethane, ventilate with nitrogen for 30 minutes, then add 0.18mL of trifluoro Acetic acid, stirred and reacted at room temperature for 12 hours, then added 5.55 g of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ), and continued to stir and reacted for 1 hour. After the reaction, use silica gel / (dichloromethane as the eluent) column chromatography, spin dry to obtain the crude product, and then recrystallize with chloroform / methanol to obtain a dark red solid (5,15-bis(5-(2 -butyl)thiophene-2-octane)porphyrin). 1 H NMR (500MHz, Chloroform-d) δ10.28(s, 2H), 9.44–9.28(m, 8H), 7.75(d, J=3.3Hz, 2H), 7.21(d, J=3.3Hz, 2H) ,3.10(d,J=6.7Hz,4H),1.93(h,J=6.3Hz,2H),1.65–1.34(m,32H),1.01(t,J=7.0Hz,6H),0.98–0.91( m,6...

Embodiment 2

[0091] Synthesis of 5,15-bis(ethyliodopyridinium quaternary ammonium-3-acetylene)-10,20-bis(5-(2-butyl)thiophene-2-octane)zinc porphyrin

[0092] The reaction equation is as follows:

[0093]

[0094] Reaction steps are the same as the step (6) of Example 1 ) of zinc porphyrin, the difference is that ethyl iodide replaces ethyl bromide for ionization, and the product is a blue solid (5,15-bis(ethyl iodopyridinium quaternary ammonium salt-3-acetylene)-10,20 - bis(5-(2-butyl)thiophene-2-octane)zinc porphyrin). 1 H NMR (500MHz, DMSO-d 6 )δ10.03 (s, 2H), 9.91 (d, J = 4.6Hz, 4H), 9.36 (dt, J = 8.2, 1.4Hz, 2H), 9.24 (dt, J = 6.1, 1.3Hz, 2H), 9.12(d, J=4.6Hz, 4H), 8.42(dd, J=8.1, 6.0Hz, 2H), 7.83(d, J=3.3Hz, 2H), 7.35(d, J=3.3Hz, 2H), 4.83(q,J=7.3Hz,4H),1.90(q,J=6.2Hz,2H),1.75(t,J=7.4Hz,4H),1.64–1.18(m,32H),0.98(t,J =7.1Hz,6H),0.93–0.84(m,6H).

Embodiment 3

[0095] The structure of embodiment 3 device

[0096] The ionized pyridine porphyrin-5,15-bis(ethyl bromide pyridinium quaternary ammonium salt-3-acetylene)-10,20-bis(5-(2-butyl)thiophene-2-octyl) prepared in Example 1 Alk) zinc porphyrin (m-PYBrZnPor) as a cathode buffer layer material for perovskite solar cells.

[0097] The structure of the perovskite solar cell device using m-PYBrZnPor as the cathode buffer layer is ITO / PTAA / perovskite layer (CH 3 NH 3 PB 3 ) / PCBM / m-PYBrZnPor / electrode Ag.

[0098] Preparation method of perovskite solar cell device using m-PYBrZnPor as cathode buffer layer:

[0099] (1) Preparation of PTAA layer: by solution method, a layer of PTAA (polytriethylamine) was spin-coated on the ITO transparent glass substrate as the anode interface. Spin coating for 40 seconds and anneal at 100°C for 10 minutes to obtain a 17nm thick PTAA layer;

[0100] (2) The structure of the photoactive layer, that is, the perovskite layer: on the PTAA layer, the PbI ...

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Abstract

The invention belongs to the technical field of perovskite solar cells, and discloses a porphyrin small molecule perovskite cathode buffer layer material, a preparation method and applications thereof, wherein the porphyrin small molecule perovskite cathode buffer layer material has a structure formula represented by a formula I, M is metal ion or hydrogen, A is a conjugated unit with a polar group, Ar is a substituted or unsubstituted aromatic group, and the porphyrin small molecule perovskite cathode buffer layer material is used for preparing perovskite solar cells. According to the presentinvention, one layer of the porphyrin small molecule perovskite cathode buffer layer material can replace the C60 and BCP two-layer interface commonly used in the current literature while the performance of the device can be improved; and the porphyrin small molecule perovskite cathode buffer layer material has the water-alcohol-soluble property, can be subjected to rotary solution coating, and can substantially reduce the cost of the device. The formula I is defined in the specification.

Description

technical field [0001] The invention relates to a perovskite solar cell interface material, in particular to a porphyrin small molecule perovskite cathode buffer layer material and a preparation method thereof. The cathode buffer layer material is used in a perovskite solar cell and is in a perovskite Between the PCBM layer of the solar cell and the metal electrode, the photoelectric conversion efficiency of the perovskite solar cell can be significantly improved. Background technique [0002] With the depletion of traditional fossil energy, the development of renewable energy has become an important research topic for current researchers. Solar energy is a renewable clean energy, and has the advantages of large reserves and wide distribution. It is a huge energy treasure house. The development and utilization of solar energy has become a hot spot of widespread concern in various countries. At present, various photovoltaic cells have been developed. And get a lot of researc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D487/22H01L51/42H01L51/46
CPCC07D487/22H10K85/30H10K85/331H10K85/371H10K85/381H10K30/20Y02E10/549
Inventor 彭小彬刘勇
Owner SOUTH CHINA UNIV OF TECH
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