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All-inorganic perovskite solar cell based on inorganic perovskite nanocrystalline interface layer and preparation method and application thereof

A technology of solar cells and inorganic calcium, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of low battery efficiency, high density, large energy level difference between device structures and interfaces, and achieve simple steps, reduce defect state density, and improve Effects of hole extraction and transport efficiency

Active Publication Date: 2019-10-08
OCEAN UNIV OF CHINA
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Problems solved by technology

[0003] However, low-cost carbon-based CsPbBr 3 Perovskite solar cells due to CsPbBr 3 The high defect state density inside the film and the large interface energy level difference of the device structure lead to serious charge recombination and low battery efficiency

Method used

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  • All-inorganic perovskite solar cell based on inorganic perovskite nanocrystalline interface layer and preparation method and application thereof
  • All-inorganic perovskite solar cell based on inorganic perovskite nanocrystalline interface layer and preparation method and application thereof
  • All-inorganic perovskite solar cell based on inorganic perovskite nanocrystalline interface layer and preparation method and application thereof

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Embodiment 1

[0031] 1. Mix 5 mL octadecene, 22.95 mg PbBr 2 and 57.625 mg PbI 2 Put it into the flask, heat it to 120°C, and keep it in a vacuum state for 1 hour; after blowing nitrogen, add a mixture of 0.5 mL oleylamine and 0.5 mL oleic acid dried at 70°C, stir until the mixture dissolves, and keep it in a vacuum state for 30 minutes;

[0032] 2. Heat the flask to 170°C, quickly put in the cesium precursor solution, and cool the flask quickly in an ice-water bath after 10 seconds;

[0033] 3. Add the above mixture to methyl acetate and n-hexane and centrifuge at high speed to remove the precipitate and obtain clarified CsPbBrI 2 n-hexane solution of perovskite nanocrystals;

[0034] 4. Prepare ethanol solution of isopropyl titanate and prepare TiO 2 Slurry, prepared TiCl 4 Aqueous solution, the preparation concentration is 1mol / L of PbBr 2 DMF solution, the preparation concentration is the methanol solution of the CsBr of 0.07 mol / L;

[0035] 5. Spin-coat the ethanol solution of i...

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Abstract

The invention provides an all-inorganic perovskite solar cell based on an inorganic perovskite nanocrystalline interface layer and a preparation method and an application thereof. The method is characterized in that the lead bromide is spin-coated on a surface of a conductive glass-supported titanium dioxide electron transport layer by the multi-step spin coating technique, a high-purity CsPbBr3 light absorbing layer is prepared by spin coating of cesium bromide in multiple steps, n-hexane solution with the inorganic perovskite nanocrystals is then spin-coated onto the CsPbBr3 layer for interfacial modification, and lastly, a carbon coated back cell is assembled into the all-inorganic perovskite solar cell. The method is advantaged in that high hole conductivity and energy level adjustability of the inorganic perovskite nanocrystal are fully utilized, electron-hole separation is promoted, energy loss is reduced, perovskite is treated with the n-hexane solvent, the perovskite grain sizeis increased, defect density and charge recombination are reduced, energy conversion efficiency of the cell is effectively improved, the preparation process is simple, cost is controllable, the material optimization space is large, and the commercial production prospect is further wide.

Description

technical field [0001] The invention belongs to the field of new material technology and new energy technology, and in particular relates to an all-inorganic perovskite solar cell based on an inorganic perovskite nanocrystal interface layer and its preparation method and application. Background technique [0002] Solar energy resources have become an important part of human energy. Because of their advantages such as no need to mine, clean and harmless, inexhaustible, and huge energy, they have attracted more and more attention. Using solar cells to directly convert solar energy into electrical energy is one of the cleanest and most efficient ways to utilize solar energy resources. Among many solar cells, perovskite solar cells have become the most dazzling photovoltaic devices due to their simple preparation process, low cost, and high efficiency. Unstable and prone to decomposition and organic cations (MA + ,FA + ) is volatile under high heat conditions, resulting in un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/032H01L31/072
CPCH01L31/032H01L31/072H01L31/18Y02E10/50Y02P70/50
Inventor 贺本林苏国栋
Owner OCEAN UNIV OF CHINA
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