A kind of method for preparing perovskite film
A technology of perovskite and perovskite precursors, which is applied in semiconductor/solid-state device manufacturing, photovoltaic power generation, electrical components, etc., can solve the problems of limiting the large-scale preparation of perovskite thin films, increasing the cost of perovskite, limiting selection, etc. problems, to achieve the effect of separation and transmission, less defects, and high uniformity
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Embodiment 1
[0023] First, sol-gel method to prepare TiO 2 Colloid, spin-coated on the cleaned FTO glass, then 500 o C heat treatment for 30 min to obtain dense TiO 2 film. Spin-coating TiO on dense film 2 Slurry, TiO 2 Particle size ~20 nm, then further 500 o C heat treatment for 30 min to obtain TiO 2 Mesoporous film. Second, the HPbI 3 The crystal is formulated into a solution with a mass ratio of 50%, and then spin-coated on the mesoporous TiO 2 On the film, heated to 100 o C, 10 min, evaporate the solvent, and then the prepared HPbI 3 The film was smoked with methylamine gas for 4 seconds to obtain a dense and crystallized methylamine lead iodine perovskite film. Finally, the hole transport layer spiro is spin-coated on the perovskite layer, and the silver electrode is evaporated to assemble the solar cell device.
[0024] Characterize the perovskite film obtained in this example and the solar cell prepared from the film, such as figure 1 HPbI before medium treatment 3 Film and after tre...
Embodiment 2
[0026] First, sol-gel method to prepare TiO 2 Colloid, spin-coated on the cleaned FTO glass, then 500 o C heat treatment for 30 min to obtain dense TiO 2 film. Spin-coating TiO on dense film 2 Slurry, TiO 2 Particle size ~20 nm, then further 500 o C heat treatment for 30 min to obtain TiO 2 Mesoporous film. Second, the HPbI 3 The crystal is formulated into a solution with a mass ratio of 50%, and then spin-coated on the mesoporous TiO 2 On the film, heated to 100 o C, 10 min, evaporate the solvent, and then in the prepared HPbI 3 Drop 0.1 mL of 1 mol / L methylamine chlorobenzene solution on the film, and then rotate it at 3000r / min for 40s to obtain a dense crystalline methylamine lead iodide perovskite film. Finally, the hole transport layer spiro is spin-coated on the perovskite layer, and the silver electrode is evaporated to assemble the solar cell device. The resulting cell efficiency is 15.8%.
Embodiment 3
[0028] First, sol-gel method to prepare TiO 2 Colloid, spin-coated on the cleaned FTO glass, then 500 o C heat treatment for 30 min to obtain dense TiO 2 film. Second, the HPbI 3 The crystal is formulated into a solution with a mass ratio of 50%, and then spin-coated on the dense TiO 2 On the film, heated to 100 o C, 10 min, evaporate the solvent, and then the prepared HPbI 3 The film was smoked with ethylamine gas for 4 seconds to obtain a yellow phase ethylamine lead-iodine perovskite film with good dense crystallinity. Finally, the hole transport layer spiro is spin-coated on the perovskite layer, and the silver electrode is evaporated to assemble the solar cell device. The resulting cell efficiency is 2.1%.
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