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Triazole ionic liquid-doped perovskite solar cell and preparation method thereof

A technology of solar cells and ionic liquids, applied in semiconductor/solid-state device manufacturing, circuits, photovoltaic power generation, etc., to achieve the effects of delaying crystallization rate, increasing short-circuit current density, and excellent hydrophilicity

Active Publication Date: 2019-05-28
RES & DEV INST OF NORTHWESTERN POLYTECHNICAL UNIV IN SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, functionalization of the surface of perovskite films by selecting hydrophobic molecules, such as polymethacrylic acid, polystyrene, fluoroalkylsilanes, alkylsilanes, and liquid crystal polymers, is the most commonly used method to improve device stability. , but there is little research on the use of hydrophilic materials to improve the humidity stability of batteries

Method used

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  • Triazole ionic liquid-doped perovskite solar cell and preparation method thereof
  • Triazole ionic liquid-doped perovskite solar cell and preparation method thereof
  • Triazole ionic liquid-doped perovskite solar cell and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] 1) Treatment of ITO glass: first, clean the surface of ITO glass with a size of 15mm×15mm and an impedance of 10Ω / sq with decontamination powder, then ultrasonically treat it in deionized water, absolute ethanol and acetone for 15 minutes, and then Blow dry with nitrogen, and finally UV-treat the ITO glass for 15 minutes;

[0039] 2) Spin coating of the electron transport layer: firstly, the prepared TiO 2 The solution was spin-coated on the ITO glass treated in step 1) at a rate of 3000 rpm for 60 seconds, then annealed in air at 150°C for 10 minutes, and slowly cooled to room temperature to obtain dense TiO 2 Electron transport layer;

[0040] 3) "MA / EATZ" method for spin-coating perovskite light-absorbing layer: put the above-mentioned ITO glass treated in step 2) into a glove box. Take equimolar ratio of CH 3 NH 3 I and PbI 2 Add it into a mixed solvent of γ-butyrolactone and DMSO with a volume ratio of 7:3 and stir fully to obtain a pure perovskite precursor s...

Embodiment 2

[0045] 1) Treatment of ITO glass: first, clean the surface of ITO glass with a size of 15mm×15mm and an impedance of 10Ω / sq with decontamination powder, then ultrasonically treat it in deionized water, absolute ethanol and acetone for 15 minutes, and then Blow dry with nitrogen, and finally UV-treat the ITO glass for 15 minutes;

[0046] 2) Spin coating of the electron transport layer: firstly, the prepared TiO 2 The solution was spin-coated on the ITO glass treated in step 1) at a rate of 3000 rpm for 60 seconds, then annealed in air at 150°C for 10 minutes, and slowly cooled to room temperature to obtain dense TiO 2 Electron transport layer;

[0047] 3) "MA / EATZ" method for spin-coating perovskite light-absorbing layer: put the above-mentioned ITO glass treated in step 2) into a glove box. Take equimolar ratio of CH 3 NH 3 I and PbI 2 Add it into a mixed solvent of γ-butyrolactone and DMSO with a volume ratio of 7:3 and stir fully to obtain a pure perovskite precursor s...

Embodiment 3

[0052] 1) Treatment of ITO glass: first, clean the surface of ITO glass with a size of 15mm×15mm and an impedance of 10Ω / sq with decontamination powder, then ultrasonically treat it in deionized water, absolute ethanol and acetone for 15 minutes, and then Blow dry with nitrogen, and finally UV-treat the ITO glass for 15 minutes;

[0053] 2) Spin coating of the electron transport layer: firstly, the prepared TiO 2 The solution was spin-coated on the ITO glass treated in step 1) at a rate of 3000 rpm for 60 seconds, then annealed in air at 150°C for 10 minutes, and slowly cooled to room temperature to obtain dense TiO 2 Electron transport layer;

[0054] 3) "MA / EATZ" method for spin-coating perovskite light-absorbing layer: put the above-mentioned ITO glass treated in step 2) into a glove box. Take equimolar ratio of CH 3 NH 3 I and PbI 2 Add it into a mixed solvent of γ-butyrolactone and DMSO with a volume ratio of 7:3 and stir fully to obtain a pure perovskite precursor s...

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Abstract

The invention relates to a triazole ionic liquid-doped perovskite solar cell and a preparation method thereof. According to the preparation method, [EATZ]I is added into a perovskite precursor MAI solution, and a light-absorbing layer film is prepred through a spin-coating method, which is called an MA / EATZ method (E represents ethyl) for short. Because -NH2 in ionic liquid contains lone pair electrons, the unsaturated Pb<2+> defects in perovskite films can be effectively passivated under the action of a Pb-N coordination bond, and charge recombination is inhibited; in addition, due to the formation of the Pb-N coordination bond, the probability is provided for the self-assembly behavior of hydrophilic ILs on the surface of the perovskite, so that alkyl chains in the ILs are almost vertically distributed along the surface of the perovskite, and the improvement of the humidity stability of the perovskite solar cell is successfully realized. Meanwhile, due to the excellent hydrophilic performance of the ILs, the hydrophilicity of the perovskite precursor solution on the surface of a titanium dioxide electron transport layer is improved, and crystal nucleus formation and crystal growth are facilitated. And the crystallization rate of the perovskite in the thermal annealing process is reduced, so that the growth of large-size crystal grains is caused.

Description

technical field [0001] The invention belongs to the field of solar cell devices, and relates to a perovskite solar cell (Perovskite Solar Cells, PSCs) doped with a triazole ionic liquid and a preparation method thereof. Background technique [0002] With the rapid development of the global economy, the demand for energy is increasing. Facing the increasingly serious energy crisis, it is extremely urgent to find a sustainable and pollution-free clean energy. Among them, solar energy, as a representative of clean energy, has been favored by the energy industry. It can directly convert solar energy into electrical energy and has broad application prospects. In recent years, perovskite light-absorbing materials have set off a huge research boom in the field of solar cells due to their advantages such as suitable optical band gap, long carrier diffusion distance and higher light absorption coefficient. [0003] During the preparation process of perovskite solar cells, the migra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/48H01L51/46
CPCY02E10/549
Inventor 李炫华王双洁
Owner RES & DEV INST OF NORTHWESTERN POLYTECHNICAL UNIV IN SHENZHEN
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