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
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[0087] Example 1
[0088] Preparation of 2,6-bistriphenylamine-4,8-bis(alkoxy)benzo[1,2-b:4,5-b']dithiophene (Ⅲ)
[0089] The synthesis 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 has benzodithiophene as the core, and triphenylamine is connected to its two ends. The structural formula is as shown in formula (IIIa), that is, the R group in formula (III) contains 8 carbons The structure of the alkyl chain (2-ethyl-hexyl) is as follows:
[0092]
[0093] The specific synthesis steps are as follows:
[0094] (1) Alkylation reaction: 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 in a single-neck flask, add 1.5g zinc powder, 6g sodium hydroxide, 35g distilled water, and heat to reflux , The temperature of the oil bath is controlled at 120°C...
Example Embodiment
[0112] Example 2
[0113] Preparation of 2,6-bistriphenylamine-4,8-bis(dodecyloxy)benzo[1,2-b:4,5-b']dithiophene (Ⅲb)
[0114] The synthesis process is shown in route (1’):
[0115] In this embodiment, the prepared perovskite solar cell hole transport material 2,6-bistriphenylamine-4,8-bis(alkoxy)benzo[1,2-b:4,5-b' ] Dithiophene, with benzodithiophene as the core, triphenylamine is connected at its two ends, the structural formula is 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 reaction: 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 in a single-neck flask, add 1.5g zinc powder, 6g sodium hydroxide solid, 35g distilled water, and heat to reflux , The temperature is controlled at 120 ℃, the solution quickly changes fro...
Example Embodiment
[0137] Example 3 Preparation of perovskite solar cell
[0138] (1) Treatment of conductive glass: Cut conductive glass into 20mm×12mm glass sheets, 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 dense layer of TiO on the cleaned conductive glass FTO layer 2 The slurry is 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; then a layer of 20mm×10mm Al is printed on the surface 2 O 3 The particles are 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: drop 10mg / ml perovskite CH on the above device 3 NH 3 PbI 3 (Dichloromethane or tetrahydrofuran) solution, spin-coated, and dried in a vacuum drying oven at 80°C for 1 hour.
[0141] (4) Hole transport layer preparation steps: Add 35 mg / ml methylene c...
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