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Efficient and stable pure inorganic cubic phase perovskite solar cell and preparation method thereof

A solar cell and perovskite technology, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problem of inability to obtain pure cubic phase crystalline thin films, achieve good thermal stability and humidity stability, easy raw materials, and operation. simple effect

Inactive Publication Date: 2018-07-27
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] CsPbI that cannot obtain pure cubic phase crystal form in the prior art 3 The problem of thin films, the present invention proposes a method to prepare CsPbX by adding polyvinylpyrrolidone (PVP) to the perovskite precursor solution 3 A general method for perovskite thin films that can guarantee CsPbX 3 The perovskite thin film maintains a stable cubic phase crystal form at room temperature. Applying this method to perovskite photovoltaic cells can significantly improve the stability and photoelectric conversion efficiency of perovskite cells.

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  • Efficient and stable pure inorganic cubic phase perovskite solar cell and preparation method thereof
  • Efficient and stable pure inorganic cubic phase perovskite solar cell and preparation method thereof
  • Efficient and stable pure inorganic cubic phase perovskite solar cell and preparation method thereof

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Embodiment approach

[0040] As introduced in the background technology, CsPbI that cannot obtain pure cubic phase crystal form exists in the prior art 3 The problem of thin films, the present invention proposes a method to prepare CsPbX by adding polyvinylpyrrolidone (PVP) to the perovskite precursor solution 3 A general method for perovskite thin films that can guarantee CsPbX 3 The perovskite film maintains a stable cubic phase crystal form at room temperature, and applying this method to perovskite photovoltaic cells can significantly improve the stability and photoelectric conversion efficiency of perovskite cells.

[0041] The present invention will be further described below in conjunction with accompanying drawing and example.

Embodiment 1

[0043] Preparation of perovskite solar cells:

[0044] 1) Fluorine-doped tin oxide (FTO) conductive glass was ultrasonically cleaned in acetone, isopropanol and ethanol for 10 minutes, and dried with nitrogen. The cleaned conductive substrate was treated for 20 minutes under the condition of ultraviolet and ozone.

[0045] 2) 254 microliters of titanium isopropanol and 34 microliters of 2 moles per liter of dilute hydrochloric acid were added successively to 2 milliliters of absolute ethanol to make a titanium dioxide precursor solution; this solution was spin-coated on a conductive substrate with a spin coater (rotating speed 2500rpm, run for 30s), place it on a hot plate at 120 degrees Celsius and heat it for 10 minutes until the film is dry, and then transfer to a muffle furnace at 500 degrees Celsius for high temperature annealing for 30 minutes.

[0046] 3) Dilute the commercial titanium dioxide slurry (18NR-T) with absolute ethanol at a mass ratio of 2:5, and spin-coat ...

Embodiment 2

[0052] Preparation of pure inorganic cubic phase perovskite solar cells:

[0053] The present embodiment method is as embodiment 1, and difference is step 4):

[0054] Transfer the above substrate to an atmosphere of nitrogen protection, dissolve polyvinylpyrrolidone (PVP, K13-18, molecular weight 10000) in a mixed solution of dimethylformamide and dimethyl sulfoxide with a volume ratio of 1:1 , control its content between 10w% and 20w%, and stir at room temperature for 15 minutes until it is completely dissolved; then mix CsI and PbI in a molar ratio of 1:1 2 Dissolve in the above solution respectively, control the concentration to 0.4 moles per liter, and stir at 70 degrees Celsius for 30 minutes to obtain a perovskite precursor solution; spin coat the prepared precursor solution evenly on the above medium with a spin coater. Porous titanium oxide electron transport layer; the deposited film was annealed at 300 degrees Celsius for 5 minutes; after the film was cooled to roo...

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Abstract

The invention discloses an efficient and stable pure inorganic cubic phase perovskite solar cell and a preparation method thereof. Specific to the problem that a pure cubic phase crystal form CsPbI<3>thin film cannot be obtained in the prior art, a universal method for preparing a CsPbX<3> perovskite thin film by adding polyvinylpyrrolidone (PVP) to a perovskite precursor liquid is proposed; by virtue of the method, it is ensured that the CsPbX<3> perovskite thin film can maintain cubic phase crystal form stability in a normal temperature; and by applying the method to a perovskite photovoltaic cell, the stability and photoelectric conversion efficiency of the perovskite cell can be obviously improved.

Description

technical field [0001] The invention belongs to the technical field of new materials and new energy, and specifically relates to a high-efficiency and stable pure inorganic cubic phase perovskite solar cell and a preparation method thereof. Background technique [0002] In recent years, organic-inorganic hybrid perovskite solar cells have become a new star in the field of solar cells due to their excellent photoelectric conversion efficiency, but the thermal and humidity stability of the material severely restricts its commercial application. Therefore, it is of great significance to study perovskite solar cells with high stability. [0003] Compared with organic-inorganic hybrid perovskite materials, pure inorganic perovskite materials have better thermal stability and humidity stability, and are ideal materials for the preparation of high-stability perovskite solar cells. However, the ideal cubic phase perovskite (CsPbX 3 , X is a halogen atom) has phase instability, esp...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/48
CPCH10K30/00Y02E10/549
Inventor 尹龙卫李博
Owner SHANDONG UNIV
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