A kind of perovskite solar cell and preparation method thereof
A solar cell and perovskite technology, which is applied in the field of solar cells, can solve the problems of expensive raw materials, restricting the use of roll-to-roll production and printing preparation processes of perovskite solar cells, and complicated preparation processes of niobium oxide thin films. Simple and convenient method
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Embodiment 1
[0026] This embodiment provides a kind of perovskite solar cell, its structure is as follows figure 1 As shown, from bottom to top in the figure are glass substrates; cathode 1, electron transport layer 2, perovskite light-absorbing layer 3, hole transport layer 4 and metal anode 5.
[0027] The specific steps for preparing perovskite solar cells are as follows:
[0028] Step 1, the glass substrate and the cathode 1 composed of indium tin oxide (ITO) are ultrasonically cleaned with acetone, detergent, isopropanol and acetone respectively, and the substrate is treated with ultraviolet and ozone for 20 minutes. At room temperature, configure an aqueous solution of niobium pentachloride with a concentration of 0.4 mol / liter in the air to prepare a niobium oxide precursor solution, which is filtered and then spin-coated on the cathode 1 at a speed of 6000 rpm; The annealing treatment was carried out for 1 hour under the condition of , and an electron transport layer 2 with a thic...
Embodiment 2
[0033] This embodiment provides a kind of perovskite solar cell, its structure is as follows figure 1 As shown, the specific steps are as follows:
[0034] In step 1, the glass substrate and the cathode 1 composed of indium tin oxide (ITO) are ultrasonically cleaned with acetone, detergent, isopropanol and acetone respectively, and then the substrate is treated with ultraviolet and ozone for 20 minutes. At room temperature, an aqueous solution of niobium pentachloride with a concentration of 0.6 moles per liter was prepared in the air to form a niobium oxide precursor solution, which was filtered and then spin-coated on the cathode 1 at a speed of 6000 rpm, and annealed at 150°C for 1 hours, an electron transport layer 2 with a thickness of 90 nm was formed.
[0035] In step 2, the perovskite light-absorbing layer 3 is prepared on the electron transport layer 2 by one-step spin coating. Specifically, lead iodide and methylamino iodide are mixed in a molar ratio of 1:1 and di...
Embodiment 3
[0039] This embodiment provides a kind of perovskite solar cell, its structure is as follows figure 1 As shown, the specific steps are as follows:
[0040]In step 1, the glass substrate and the cathode 1 composed of indium tin oxide (ITO) are ultrasonically cleaned with acetone, detergent, isopropanol and acetone respectively, and the substrate is treated with ultraviolet and ozone for 20 minutes. At room temperature, configure an aqueous solution of niobium pentachloride with a concentration of 0.8 moles per liter in the air to form a niobium oxide precursor solution, which is filtered and then spin-coated on the cathode 1 at a speed of 6000 rpm, and then annealed at 150°C It was treated for 1 hour to form an electron transport layer 2 with a thickness of 120 nm.
[0041] In step 2, the perovskite light-absorbing layer 3 is prepared on the electron transport layer 2 by one-step spin coating. Specifically, lead iodide and methylamino iodide are mixed in a molar ratio of 1:1 ...
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