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Method for passivating perovskite and preparation process of perovskite solar cell

A solar cell and perovskite technology, applied in the field of solar cells, can solve problems such as synergistic perovskite solar cells, perovskite degradation, and impact on charge transfer, and achieve improved charge transfer performance, prevention of degradation, and low cost Effect

Pending Publication Date: 2021-01-12
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these defects are shallow defects, on the one hand, these defects will form charge recombination centers, affect charge transport, and then reduce battery efficiency; on the other hand, these defects will adsorb oxygen and water vapor, causing degradation of perovskite, thereby affecting battery stability.
This kind of organic ammonium hexafluorophosphate can bond with the dangling bonds in the perovskite absorbing layer, effectively passivate the defects on the surface of the perovskite, and further enhance the efficiency of perovskite solar cells. Currently, organic ammonium hexafluorophosphate is used Salt passivation treatment and used in the preparation process of perovskite solar cells have not yet been reported

Method used

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  • Method for passivating perovskite and preparation process of perovskite solar cell

Examples

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Embodiment 1

[0045] Adopt tetraethylhexafluoroammonium phosphate (TEA) as the perovskite solar cell of passivating agent and preparation method thereof:

[0046] The cell structure of the perovskite solar cell is FTO / c-TiO 2 / m-TiO 2 / perovskite / TEA / Spiro-OMeTAD / Au. Wherein, the structural formula of the TEA is as follows:

[0047]

[0048] The preparation process of the perovskite solar cell is:

[0049] (1) FTO (fluorine-doped tin dioxide) conductive glass was cut into 25mm x 15mm glass substrates and etched using zinc powder and hydrochloric acid chemistry. The etched glass substrates were ultrasonically cleaned in deionized water, acetone, and ethanol for 15 minutes, and then placed in a UV-ozone machine for 15 minutes.

[0050] (2) Using the spray pyrolysis method, spray an isopropanol solution of 0.2M titanium tetraisopropoxide and 2M acetylacetone on the FTO glass substrate heated to 500°C to form a thin layer of TiO 2 Dense layer; 150mg / ml nano-TiO 2 ethanol solution spin-...

Embodiment 2

[0057] Adopt tetrabutyl ammonium hexafluorophosphate (TBA) as the perovskite solar cell of passivating agent and preparation method thereof:

[0058] The cell structure of the perovskite solar cell is FTO / c-TiO 2 / m-TiO 2 / perovskite / TBA / Spiro-OMeTAD / Au. Wherein, the structural formula of the TBA is as follows:

[0059]

[0060] The preparation process of the perovskite solar cell is:

[0061] (1) FTO (fluorine-doped tin dioxide) conductive glass was cut into 25mm x 15mm glass substrates and etched using zinc powder and hydrochloric acid chemistry. The etched glass substrates were ultrasonically cleaned in deionized water, acetone, and ethanol for 15 minutes, and then placed in a UV-ozone machine for 15 minutes.

[0062] (2) Using the spray pyrolysis method, spray an isopropanol solution of 0.2M titanium tetraisopropoxide and 2M acetylacetone on the FTO glass substrate heated to 500°C to form a thin layer of TiO 2 Dense layer; 150mg / ml nano-TiO 2 ethanol solution spin...

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Abstract

The invention belongs to the technical field of solar cells, and discloses a method for passivating perovskite and a preparation process of a perovskite solar cell. According to the method, organic ammonium hexafluorophosphate is introduced to passivate defects on the surface of the perovskite thin film, and an organic ammonium hexafluorophosphate passivation layer is formed on the surface of theperovskite thin film; and when the perovskite layer is passivated, the organic ammonium hexafluorophosphate can be bonded with dangling bonds in the perovskite absorption layer, so that defects on thesurface of perovskite can be effectively passivated, and the perovskite solar cell can be further synergized. The perovskite solar cell adopting the perovskite passivation method has the advantages of high efficiency, stability and low cost, and development of the preparation technology provides a new device preparation strategy for commercial application of the perovskite solar cell.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and relates to a method for passivating perovskite and a preparation process for perovskite solar cells. Background technique [0002] In view of the excellent photoelectric properties of organic-inorganic hybrid perovskite, it has set off an upsurge in its application and research in the field of photovoltaics, and has attracted extensive attention from researchers. In just ten years, the highest certified photoelectric conversion efficiency of perovskite solar cells has been changed from the initial 3.8% quickly increased to 25.2%, realizing the rapid development and breakthrough in this field. Nevertheless, in the field of perovskite solar cell research, the further improvement of efficiency and device stability are still the bottlenecks that limit the industrialization of perovskite solar cells. Among them, one of the main factors that adversely affects cell efficiency and stability It ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/44H01L51/42
CPCH10K71/00H10K71/12H10K71/40H10K30/151H10K30/88Y02E10/549
Inventor 苗亚伟程明陈承郑盟盟
Owner JIANGSU UNIV
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