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Hole transporting material for perovskite solar cell and application thereof

A reaction, alkyl chain technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of difficulty in refining, high price, and complex synthesis steps of sprio-MeOTAD

Inactive Publication Date: 2016-09-28
EAST CHINA NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis steps of sprio-MeOTAD are complex and difficult to refine, so the preparation cost is high, the price is expensive, and the hole mobility is low

Method used

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  • Hole transporting material for perovskite solar cell and application thereof
  • Hole transporting material for perovskite solar cell and application thereof
  • Hole transporting material for perovskite solar cell and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Preparation of 2,6-bistriphenylamine-4,8-bis(alkoxy)benzo[1,2-b:4,5-b']dithiophene(Ⅲ)

[0089] The synthetic process is shown in route (1'):

[0090]

[0091] In this example, the prepared perovskite solar cell hole transport material 2,6-bistriphenylamine-4,8-bis(2-ethyl-hexyloxy)benzo[1,2-b:4 ,5-b']dithiophene takes benzodithiophene as the core, and connects triphenylamine at its two ends. The structural formula is as shown in formula (IIIa), that is, the R group in formula (III) contains 8 carbons The alkyl chain (2-ethyl-hexyl), its structural formula is as follows:

[0092]

[0093] The specific synthesis steps are as follows:

[0094] (1) Alkylation: Preparation of 4,8-bis(2-ethyl-hexyloxy)benzo[1,2-b:4,5-b']dithiophene (Ia)

[0095] Weigh 2.2g of benzo[1,2-b:4,5-b']dithiophene-4,8-dione into a single-necked flask, add 1.5g of zinc powder, 6g of sodium hydroxide, 35g of distilled water, and heat to reflux , the temperature of the oil bath was controlled ...

Embodiment 2

[0113] Preparation of 2,6-bistriphenylamine-4,8-bis(dodecyloxy)benzo[1,2-b:4,5-b']dithiophene (Ⅲb)

[0114] The synthetic process is shown in route (1'):

[0115] In this example, the prepared perovskite solar cell hole transport material 2,6-bistriphenylamine-4,8-bis(alkoxy)benzo[1,2-b:4,5-b' ] Dithiophene, take benzodithiophene as the core, connect triphenylamine at its two ends, the structural formula is as shown in formula (IIIb), that is, the R group in formula (III) is an alkyl chain containing 12 carbons , its structural formula is as follows:

[0116]

[0117] The specific synthesis steps are as follows:

[0118] (1) Alkylation: Preparation of 4,8-bis(dodecyloxy)benzo[1,2-b:4,5-b']dithiophene (Ib)

[0119] Weigh 2.2g of benzo[1,2-b:4,5-b']dithiophene-4,8-dione single-necked flask, add 1.5g of zinc powder, 6g of sodium hydroxide solid, 35g of distilled water, and heat to reflux , the temperature was controlled at 120°C, the solution quickly changed from yellow to...

Embodiment 3

[0137] The preparation of embodiment 3 perovskite solar cells

[0138] (1) Treatment of conductive glass: cut the conductive glass into 20mm×12mm glass pieces, and wash them with detergent, deionized water, ethanol, and acetone in sequence.

[0139] (2) Screen printing step: use a screen printing template to print a layer of dense TiO on the cleaned conductive glass FTO layer 2 The slurry was dried at 80°C and dried at 450°C for half an hour to obtain TiO 2 Thin film, the thickness of the film is about 50nm-150nm; and then print a layer of 20mm×10mm Al on its surface 2 o 3 The particles were dried at 80°C and dried at 450°C for half an hour to obtain TiO 2 Thin film, the thickness of the film is about 150nm-250nm.

[0140] (3) Perovskite filling step: Add 10 mg / ml of perovskite CH dropwise on the above-mentioned device 3 NH 3 PB 3 (dichloromethane or tetrahydrofuran) solution, spin-coated, and dried in a vacuum oven at 80°C for 1 hour.

[0141] (4) Preparation step of ...

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Abstract

The invention discloses a hole transporting material 2,6-bistriphenylamine-4,8-bis(alkoxy)benzo[1,2-B:4,5-B']dithiophene for a perovskite solar cell. The hole transporting material has simple molecular structures, high hole mobility, high efficiency, high conductivity and good solubility; aromatic functional radicals can be introduced into lateral groups; the perovskite solar cell prepared from the hole transporting material can be matched with the energy level of perovskite. The invention also discloses a preparation method of the hole transporting material. The hole transporting material for the perovskite solar cell is prepared and obtained by using 2,6-dibromo-4,8-bis(alkoxy)benzo[1,2-B:4,5-B']dithiophene and 4-(Diphenylamino)phenylboronicacid as raw materials through a one-step SUZUKI reaction. The preparation method provided by the invention has the characteristics that the operation is simple, the raw materials are low-cost and easily obtained, the separation is easy, and the yield is high.

Description

technical field [0001] The invention belongs to the technical field of chemistry and energy batteries, in particular to a new perovskite solar cell hole transport material 2,6-bistriphenylamine-4,8-bis(alkoxy)benzo[1,2 -b: 4,5-b']dithiophene and its preparation method. Background technique [0002] After the first generation of silicon solar cells, the second generation of III B After the development of thin-film solar cells such as group VIII compounds and copper indium gallium selenide (CIGS) and the third generation of organic thin films and dye-sensitized solar cells, a new type of solar cell based on organic / inorganic composite perovskite halide materials, Referred to as perovskite solar cells (PSCs), the sudden emergence has become a research hotspot. Perovskite solar cells have the advantages of simple material synthesis, convenient preparation process, high solar absorption rate, and low carrier recombination rate. [0003] Perovskite solar cells include a fluorin...

Claims

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Application Information

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IPC IPC(8): C07D495/04H01L51/46
CPCC07D495/04H10K85/631H10K85/6576H10K30/00Y02E10/549
Inventor 李中宋春梅蒋兰兰
Owner EAST CHINA NORMAL UNIVERSITY
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