A kind of perovskite solar cell hole transport material and its application
A technology of solar cells and perovskites, which can be applied in circuits, photovoltaic power generation, electrical components, etc., and can solve the problems of high price, high preparation cost, and low hole mobility
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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, with benzodithiophene as the core, connected with 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 ye...
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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