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Perovskite solar cell with pyridyl BODIPY passivation layer

A solar cell and fluorine-boron-like technology, which is applied in organic chemistry, circuits, photovoltaic power generation, etc., can solve the difficulties in the preparation of fluorine-boron fluorescent materials and the difficulty of obtaining perfluorinated anion fluorine-boron fluorescent materials, etc., to achieve the purpose of suppressing ions Migration, excellent hydrophobicity, improved utilization and transport effects

Active Publication Date: 2022-02-08
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, it is difficult to prepare this kind of perfluorinated fluoroboron fluorescent materials, and most of them need inert gas protection or ultra-low temperature, and it is difficult to obtain perfluorinated anion fluoroboric fluorescent materials in the obtained products, mostly mixed halogens

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] At room temperature, first take a certain amount of compound (1) and dissolve it in an excess of 10 mL of dichloromethane (3), the concentration of compound (1) solution is 0.01 g·mL -1 Ultrasonic treatment until completely dissolved; the resulting solution was placed in a fume hood, and a certain amount of boron trifluoride ether (2) was added to make the ratio of compound (2) to compound (1) to be 1. At 20°C, the The obtained mixture was sealed and stirred for 10 h to generate the compound shown in formula (4); the solution obtained by the reaction was exposed to a heater at 50°C and heated to evaporate the solvent to dryness, washed three times with dichloromethane, suction filtered, and dried at 65°C. That is, the pyridine-based fluoroborofluorescein-like passivation material (compound (4)) with a yield of 96%.

[0035]Preparation of perovskite solar cells to obtain FTO / bl-TiO 2 / Mesoporous TiO 2 / perovskite structure, the obtained compound (4) was dissolved in is...

Embodiment 2

[0037] At room temperature, first take a certain amount of compound (1) and dissolve it in excess 5 mL of dichloromethane (3), the concentration of compound (1) solution is 0.005 g·mL -1 Ultrasonic treatment until completely dissolved; the resulting solution was placed in a fume hood, and a certain amount of boron trifluoride ether (2) was added to make the ratio of compound (2) to compound (1) to be 1.2. At 10°C, the The obtained mixture was sealed and stirred for 16 h to generate the compound shown in formula (4); the solution obtained by the reaction was exposed to a heater and heated at 40°C to evaporate the solvent to dryness, washed three times with dichloromethane, suction filtered, and dried at 60°C. That is, the pyridine-based fluoroborofluorescein-like passivation material (compound (4)) with a yield of 90%.

[0038] Preparation of perovskite solar cells to obtain FTO / bl-TiO 2 / Mesoporous TiO 2 / perovskite structure, the resulting compound (4) was dissolved in iso...

Embodiment 3

[0040] At room temperature, first take a certain amount of compound (1) and dissolve it in an excess of 20 mL of dichloromethane (3), the concentration of compound (1) solution is 1 g·mL -1 Ultrasonic treatment until completely dissolved; the resulting solution was placed in a fume hood, and a certain amount of boron trifluoride ether (2) was added to make the ratio of compound (2) to compound (1) to be 0.8. At 40°C, the The obtained mixture was sealed and stirred for 4 h to generate the compound shown in formula (4); the solution obtained by the reaction was exposed to a heater at 70 °C and heated to evaporate the solvent to dryness, washed with dichloromethane three times, suction filtered, and dried at 70 °C. That is, the pyridine-based fluoroborofluorescein-like passivation material (compound (4)) with a yield of 80%.

[0041] Preparation of perovskite solar cells to obtain FTO / bl-TiO 2 / Mesoporous TiO 2 / perovskite structure, the obtained compound (4) was dissolved in ...

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Abstract

The invention discloses a pyridine-based BODIPY-like passivation material, a preparation method thereof and an application of the material in a perovskite solar cell, and belongs to the field of photoelectric functional materials and devices. According to the invention, 2, 2-dipyridyl is used as a raw material to synthesize a BODIPY-like structure, and the BODIPY-like structure is loaded on the surface of perovskite to serve as a passivation layer of the perovskite solar cell. The synthesis route of the passivation material is simple, the conditions are mild, the solvent does not participate in the reaction, the yield is high, inert gas protection is not needed, and molecules with F as anions can be obtained; the unique structure can passivate inherent defects on the surface of the perovskite, inhibit non-radiative recombination, promote interface charge transmission, improve the light utilization rate and protect the perovskite from being eroded by water and solvents, so that the efficiency (photoelectric conversion efficiency reaches up to 20.7821%) and stability of the perovskite solar cell are improved.

Description

technical field [0001] The invention belongs to the technical field of photoelectric functional materials and devices, and in particular relates to a pyridine-based fluorine boron fluorescent passivation material, a preparation method thereof, and an application in perovskite solar cells. Background technique [0002] Organic-inorganic hybrid perovskite materials because of their suitable and tunable bandgap, high light absorption coefficient and carrier mobility, small exciton binding energy, ambipolar transport ability, and high defect The advantages such as tolerance have attracted much attention, and the photoelectric conversion efficiency of the battery has increased from the initial 3.8% to the current 25.5%. However, the commercialization of perovskite solar cells still needs to solve many problems. First of all, the defects of the perovskite material itself, especially the interface defects, lead to a large amount of charge recombination loss, resulting in a photoel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02C09K11/06H01L51/42H01L51/44
CPCC07F5/022C09K11/06C09K2211/1055H10K85/657H10K30/151H10K30/10H10K30/88Y02E10/549
Inventor 章锦丹毛紫雯朱孟琪项生昌张章静
Owner FUJIAN NORMAL UNIV
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