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Method utilizing ammonium fluoride solution to treat electron transmission layer of perovskite cell

An electron transport layer and perovskite cell technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as affecting the electron transport efficiency of electrons through the transport layer, accelerating film degradation, and complicated processes, and improving electron extraction efficiency. , reduce the preparation cost and improve the effect of the contact interface

Active Publication Date: 2017-08-18
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the field of perovskite batteries, the titanium dioxide electron transport layer prepared by a simple solution spin coating method has poor crystallinity, and the film is not uniform, and there are many defect states on the surface, which will seriously affect the electron transport layer. Electron transport efficiency will also damage the perovskite film, accelerate the degradation of the film, and affect the photovoltaic performance and stability of the perovskite cell
Using magnetron sputtering, spray pyrolysis and atomic force deposition techniques can obtain higher quality titanium dioxide thin films, but the process is complicated and requires high technical equipment, which greatly increases the preparation cost of perovskite batteries, which is not conducive to its final commercial use. change

Method used

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  • Method utilizing ammonium fluoride solution to treat electron transmission layer of perovskite cell
  • Method utilizing ammonium fluoride solution to treat electron transmission layer of perovskite cell
  • Method utilizing ammonium fluoride solution to treat electron transmission layer of perovskite cell

Examples

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Embodiment 1

[0031] Take a certain amount of titanium tetraisopropoxide and slowly drop it into 4mL of isopropanol, and stir for 10min. Prepare a 50 mM hydrochloric acid solution with isopropanol as a solvent, and slowly add it dropwise to the newly prepared titanium tetraisopropoxide solution. The entire dropping process is controlled at about 10 minutes, and stirred for 30 minutes. The obtained solution was filtered with a 0.45mm PVDF syringe filter to obtain 0.25mmol / L, 0.33mmol / L, 0.42mmol / L and 0.5mmol / L titanium dioxide precursor solutions.

Embodiment 2

[0033]First cut the FTO conductive glass into a size of 1.5cm×2.0cm, use zinc powder and 2mol / L hydrochloric acid solution to etch a 0.5cm×1.5cm strip of FTO conductive glass, and use cleaning agent and deionized glass respectively for the etched glass Water, isopropanol and acetone were ultrasonically cleaned for 20 minutes, the cleaned glass was dried in an oven at 100°C for 30 minutes, and the dried glass was treated in a UV-ozone cleaning machine for 15 minutes to remove residual organic matter on the surface to obtain a cleaner surface. The configured 0.25mmol / L, 0.33mmol / L, 0.42mmol / L and 0.5mmol / L titanium dioxide precursor solutions were spin-coated on the conductive glass at a spin-coating speed of 3000rpm and a spin-coating time of 30s. The spin-coated film was transferred to a muffle furnace for sintering at 500°C for 30min with a heating rate of 2°C / min. After the procedure is over, cool to room temperature and take out for later use. Prepare a 0.2M ammonium fluor...

Embodiment 3

[0036] First cut the FTO conductive glass into a size of 1.5cm×2.0cm, use zinc powder and 2mol / L hydrochloric acid solution to etch a 0.5cm×1.5cm strip of FTO conductive glass, and use cleaning agent and deionized glass respectively for the etched glass Water, isopropanol and acetone were ultrasonically cleaned for 20 minutes, the cleaned glass was dried in an oven at 100°C for 30 minutes, and the dried glass was treated in a UV-ozone cleaning machine for 15 minutes to remove residual organic matter on the surface to obtain a cleaner surface. The configured 0.25mmol / L, 0.33mmol / L, 0.42mmol / L and 0.5mmol / L titanium dioxide precursor solutions were spin-coated on the conductive glass at a spin-coating speed of 3000rpm and a spin-coating time of 30s. The spin-coated film was transferred to a muffle furnace for sintering at 500°C for 30min with a heating rate of 2°C / min. After the procedure is over, cool to room temperature and take out for later use. Prepare a 0.4M ammonium fluo...

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Abstract

The invention provides a method utilizing ammonium fluoride solution to treat an electron transmission layer of a perovskite cell and belongs to the treatment method technology field of the electron transmission layer of the cell. Prepared titanium dioxide precursor solution is coated on conductive glass, a coated film is transferred to a muffle furnace with temperature of 450-550 DEG C, sintering is carried out for 25-35 min, the prepared titanium dioxide film is dipped in solution for 0.1-3min to carry out ammonium fluoride surface modification treatment, the treated film is cleaned through utilizing ion water for 3-5 times and is then dried for 18-23 min under the temperature of 95-105 DEG C, and a titanium dioxide film treated through ammonium fluoride is acquired; isopropanol solution of methylamino iodide is coated on a prepared lead iodide film to prepare a perovskite film, a device coated with a cavity transmission layer material is disposed in the air for non-light oxidation for 24 hours, vapor plating of a 60nm Au electrode is carried out through utilizing vacuum vapor plating, and the acquired perovskite cell is then tested.

Description

technical field [0001] The invention relates to a method for treating an electron transport layer in a perovskite battery by using an ammonium fluoride solution, and belongs to the technical field of methods for improving the electron transport layer in the battery. Background technique [0002] With the continuous consumption of fossil energy such as oil, natural gas and coal on the earth, human beings are facing an unprecedented energy crisis. Therefore, researching, finding and developing new energy sources is a major issue related to the sustainable development of human society. Solar energy has many advantages such as cleanness, safety, inexhaustibility, low utilization cost, and no geographical constraints. It is an ideal way to solve energy and environmental problems. The development of solar energy is an important topic in new energy research. At the end of 2013, the "Science" magazine rated the all-solid-state solar cell developed by Dr. Snaith's group at Oxford Un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/46H01L51/44
CPCH10K30/80H10K30/00Y02E10/549
Inventor 李欣任子秋
Owner HARBIN INST OF TECH
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