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One-step method for preparing imitation pyramid-shaped all-inorganic perovskite film

A pyramid-shaped, inorganic calcium technology, applied in the field of solar cells, can solve the problems of destroying high trapped light gain, difficult to obtain profiling perovskite films, reducing the photoelectric conversion efficiency of tandem solar cells, etc., to achieve high efficiency.

Active Publication Date: 2021-03-23
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the perovskite film obtained by these processes is relatively flat, and it is difficult to obtain a profiled perovskite film, which destroys the high light trapping gain brought by the silicon pyramid textured structure and reduces the photoelectric conversion of tandem solar cells. efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] One-step preparation of imitation pyramid-shaped CsPbI 3 A method for an all-inorganic perovskite film, comprising the following steps:

[0028] 1), in a low-pressure airtight container with a pressure of 1000Pa, CsPbI with a particle size distribution of 15-25 μm 3 The perovskite powder is heated to a significant gasification state, forming a gas phase containing CsPbI 3 Microparticle beam of perovskite;

[0029] 2) Place the silicon substrate with a pyramid shape in the microparticle beam at a distance of 2m from the particle source. The microparticle beam is applied to the substrate with a pyramid shape at 10-170°. The moving speed of the microparticle beam on the surface of the substrate is 800mm / s, using CsPbI in the particle beam 3 Non-line-of-sight transport and line-of-sight deposition behavior of materials, obtaining uniform imitation pyramidal CsPbI 3 Perovskite film; at the same time, the temperature of the substrate is kept at 100°C by blowing cold air. ...

Embodiment 2

[0033] A method for preparing a pyramid-like all-inorganic perovskite film in one step, comprising the following steps:

[0034] 1) In a low-pressure airtight container with a pressure of 4000Pa, CsSnI with a particle size distribution of 15-25 μm 3 The perovskite powder is heated to a significant gasification state, forming a gas-phase CsSnI-containing 3 Microparticle beam of perovskite;

[0035] 2) Place the silicon substrate with a pyramid shape in the microparticle beam at a distance of 1m from the particle source. The microparticle beam is applied to the substrate with a pyramid shape at 10-170°, and the free path of the microparticles is larger than that of the pyramid by adjusting the pressure. 50% of average feature height using CsSnI within a microparticle beam 3 Non-line-of-sight transport and line-of-sight deposition behavior of materials, obtaining uniform imitation pyramidal CsSnI 3 Perovskite film; at the same time, the temperature of the substrate is kept at ...

Embodiment 3

[0039] One-step preparation of imitation pyramid-shaped CsPbI 3 A method for an all-inorganic perovskite film, comprising the following steps:

[0040] 1), in a low-pressure airtight container with a pressure of 5Pa, CsPbI with a particle size distribution of 15-25 μm 3 The perovskite powder is heated to a significant gasification state, forming a gas phase containing CsPbI 3 Microparticle beam of perovskite;

[0041] 2) Place a silicon substrate with a pyramidal shape in the microparticle beam at a distance of 0.8m from the particle source. The microparticle beam is applied to the substrate with a pyramidal shape at 30-120°, and the movement of the microparticle beam on the surface of the substrate The speed is 100mm / s, using CsPbI in the particle beam 3 Non-line-of-sight transport and line-of-sight deposition behavior of materials, obtaining uniform imitation pyramidal CsPbI 3 Perovskite film; at the same time, the temperature of the substrate is kept at 100°C by blowing...

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Abstract

The invention provides a method for preparing a pyramid-like all-inorganic perovskite film in one step, comprising: 1) heating all-inorganic perovskite powders to a significant gasified state to forma micro-particle beam comprising gas phase inorganic perovskite; 2) putting a substrate in a pyramid shape at a position in the micro-particle beam having a certain distance to a particle source, andapplying the micro-particle beam to the surface of the substrate in the pyramid shape at an angle; 3) rapidly drying the all-inorganic perovskite film; and 4) subjecting the perovskite film to heat treatment and finally obtaining the uniform, dense and fully-covered pyramid-like all-inorganic perovskite film. The method not only solves the decrease in the efficiency of a laminated cell caused by the damage to the high trapped textured structure due to spin coating, blade coating and silk-screen printing, but also solves the poor chemical and thermal stability caused by the use of traditional CH3NH3PbX3 (X=Cl, I, Br) perovskite material containing an organic functional group so as to obtain the efficient and stable perovskite / crystalline silicon laminated solar cell.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a method for preparing a pyramid-like all-inorganic perovskite film in one step. Background technique [0002] With the increasingly serious environmental pollution and energy crisis, increasing the application of clean energy such as wind energy, hydroelectric energy, geothermal energy and solar energy has become an important measure to solve the energy crisis and deal with environmental pollution. Solar energy has a series of advantages such as safety, no pollution, and is not restricted by geographical conditions, so it has undoubtedly become the most promising clean energy. [0003] At present, crystalline silicon solar cells occupy 90% of the photovoltaic market, and the efficiency of the cells has reached 25.6%, which is close to the Shockley-Queisser (29.4%) limit efficiency. Although the crystalline silicon solar cell has a wider absorption spectrum, it a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L21/02H01L31/032H01L31/18
CPCH01L21/02521H01L21/02631H01L31/032H01L31/18Y02P70/50
Inventor 杨冠军刘研李广荣李小磊高黎黎李长久李成新
Owner XI AN JIAOTONG UNIV
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