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Cathode interface modification layer material and perovskite solar cell

A solar cell and cathode interface technology, applied in the field of solar cells, achieves the effects of simple operation, process compatibility and roughness reduction

Active Publication Date: 2020-07-28
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a cathode interface modification layer material and a perovskite solar cell, aiming to solve the problem of energy conversion efficiency of the existing inverted structure perovskite solar cell

Method used

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  • Cathode interface modification layer material and perovskite solar cell
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  • Cathode interface modification layer material and perovskite solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Ar is n1=2, R is a hydrogen atom (H); its molecular structural formula is:

[0029]

[0030] Its synthetic route is as follows:

[0031]

[0032] In a 100ml single-necked bottle, dissolve ethylenediamine (11.4mmol) in 50mL chloroform solution, slowly add di-tert-butyl dicarbonate (0.5g, 2.29mmol) dissolved in 10mL chloroform solution, stir at room temperature for 12 hours, spin dry The solvent was packed into a column, and compound 1 was obtained by separation with methanol, chloroform and a small amount of triethylamine as eluents. Compound 1 (0.8g, 5.0mmol), 2-chloromethylpyridine hydrochloride (1.8g, 10.9mmol) and sodium carbonate (2.4g, 22.6mmol) were dissolved in 15mL of dry ethanol solution, under nitrogen atmosphere Stir for 12 hours, spin to dry the solvent, add 50 mL of sodium hydroxide aqueous solution, and then extract with dichloromethane three times, dry with anhydrous potassium carbonate, pack into a column, and separate with ethyl acetate as the ...

Embodiment 2

[0034] Ar is n=1, R is a hydrogen atom (H); its molecular structural formula is:

[0035]

[0036] Its preparation method is as follows:

[0037]

[0038] In a 250ml single-necked bottle, 2g (10mmol) of compound 1 and 1.38g (10mmol) of potassium carbonate were dissolved in 120ml of acetonitrile, and the acetonitrile solution of 1.98g (10mmol) of compound 2 was slowly added dropwise. Heat to reflux overnight, cool, pour the mixed solution into ice water, extract with DCM (dichloromethane), spin the organic phase to dryness and concentrate, pack into a column, use DCM: ACE (dichloromethane: acetone) = 1:1 as elution agent, separated to obtain 2.5 g of light yellow liquid, and the yield was 81%.

[0039] 1 H NMR (CDCl 3 , 300MHz), (ppm): 2.68(t, 2H), 3.88(t, 2H), 4.06(s, 4H), 7.25~7.31(m, 4H), 7.78(m, 2H), 8.49(d, 2H ).

[0040]

[0041]In a 100ml pressure bottle, 0.54g (2mmol) of compound 4 and 0.818g (6mmol) of potassium carbonate were added to 50ml of DMF solut...

Embodiment 3

[0044] Step 1. Device preparation

[0045] (1) if figure 1 The preparation of the inverted structure perovskite solar cell device ITO / PTAA / Perovskite Layer / PC61BM / NDI-BN / Ag with interface modification layer shown (PTAA represents poly[bis(4-phenyl)(2,4,6 -Trimethylphenyl)amine], Perovskite Layer represents the perovskite layer, PC61BM represents a fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester, Ag represents silver, and 1 in the figure is ITO, 2 is PTAA, 3 is Perovskite Layer, 4 is PC61BM, 5 is NDI-BN, 6 is Ag):

[0046] The patterned ITO glass substrates were washed sequentially with acetone, water and ethanol, and washed with N 2 Airflow drying followed by plasma treatment for 1 min. PTAA was dissolved in toluene at a concentration of 2 mg / ml, spin-coated onto a patterned ITO glass substrate (approximately 7 nm thick) at 3500 rpm for 15 seconds, and then annealed at 110 °C for 15 minutes. To enhance the wettability of PTAA to the perovskite solution, the...

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Abstract

The invention discloses a cathode interface modification layer material and a perovskite solar cell. The structural formula of the cathode interface modification layer material is as shown in the specification, wherein Ar is as shown in the specification, n is equal to 1, 2, 3 or 4, and n1 is equal to 1, 2, 3 or 4; and R is H, F, Cl, Br, I, CN, NO3, NH3, CH3 or OCH3. When the cathode interface modification material with the above structure is used for preparing a perovskite solar cell with an inverted structure, the cathode interface modification material has the advantages that the roughnessof an electron transport layer can be reduced, and the collection of carriers by a cathode is facilitated; by introducing the cathode interface modification layer as shown above, a built-in electric field of the device can be improved, so that collection of electrons by the device is facilitated. As the cathode interface modification material has good water-alcohol solubility, the cathode interface modification material can be spin-coated in an electron transport layer through a solution spin-coating method while the electron transport layer is not damaged, the operation is simple, and the cathode interface modification material is compatible with a roll-to-roll process.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a cathode interface modification layer material and a perovskite solar cell. Background technique [0002] Since perovskite was first used in the preparation of solar cells in 2009, due to the lead halide perovskite (such as CH 3 NH 3 PB 3 ) as a light-absorbing layer has the potential to convert solar energy into electrical energy at low cost, and has attracted extensive attention from industry and academia. Organic-inorganic hybrid perovskite has many advantages as a light-absorbing layer, such as wide absorption, long exciton diffusion length, solution-processable characteristics, etc. These advantages have enabled researchers to achieve rapid breakthroughs in perovskite solar cells. , the photoelectric conversion efficiency from the initial power conversion efficiency (PCE) of 3.8% to the current maximum of more than 25%. [0003] Perovskite solar cells have the follo...

Claims

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Application Information

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IPC IPC(8): C07D471/06C07D495/16H01L51/42H01L51/44H01L51/46
CPCC07D471/06C07D495/16H10K85/657H10K30/451H10K85/6572H10K30/81Y02E10/549
Inventor 孟鸿宁皎邑缪景生胡钊陈小龙
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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