Method for preparing pyramid-like all-inorganic perovskite film in one step
A pyramid-shaped, inorganic calcium technology, applied in the field of solar cells, can solve the problems of destroying high light trapping gain, reducing the photoelectric conversion efficiency of stacked solar cells, and it is difficult to obtain profiling perovskite films, etc., to achieve high efficiency.
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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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