Preparation method for organic/inorganic hybrid perovskite thin film and solar cell

A solar cell and perovskite technology, applied in the field of solar cells, can solve the problems of low film quality, rough film surface, difficult heat treatment temperature and time, etc., and achieve high production efficiency, high photoelectric conversion efficiency, and few grain boundaries. Effect

Active Publication Date: 2016-04-13
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The present invention aims to solve many problems such as the difficulty in precise control of the heat treatment temperature and time in the traditional heating annealing process for preparing hybrid perovskite films in the prior art, the rough surface of the film, and the low quality of the film. Preparation of hybrid perovskite thin film, and preparation of perovskite solar cells using the method

Method used

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  • Preparation method for organic/inorganic hybrid perovskite thin film and solar cell
  • Preparation method for organic/inorganic hybrid perovskite thin film and solar cell
  • Preparation method for organic/inorganic hybrid perovskite thin film and solar cell

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[0027] The invention adopts a microwave radiation treatment method to prepare a hybrid perovskite thin film. The chemical formula of the perovskite film is ABX 3 . where A is a cation of an organic amine, including but not limited to CH 3 NH 3 + ,NH 2 -CH=NH 2 + , C 4 h 9 NH 3 + Wait. B=Pb 2+ ,Sn 2+ , Ge 2+ ,Co 2+ , Fe 2+ , Mn 2+ , Cu 2+ , and Ni 2+ at least one of the That is, the B site may be one of these ions, or may be a mixed structure of any two or more of these ions. In one example, ABX 3 ASn 1-x Pb x x 3 (0- , Br - , I - at least one of the That is, X may be a single halogen or a mixed halogen such as a mixture of any two halogens. For example, the perovskite film includes but is not limited to lead iodide methylamine, lead iodide formamidine, and the like. Specifically, as an example, its preparation method may include the following steps.

[0028] First, a perovskite film without heat treatment is obtained on a substrate.

[0029] The ...

Embodiment 1

[0059] (1) Preparation of perovskite thin films without heat treatment. Clean the FTO glass with acetone, alkaline detergent, deionized water, and acetone ultrasonically for ten minutes, and finally blow dry. TiO was then prepared on the FTO glass substrate 2 Dense layer, the precursor solution solvent is ethanol, which includes the following components: tetraisopropyl titanate (0.3mol / L), acetylacetone (0.45mol / L), hydrochloric acid (0.09mol / L), water (1.8mol / L L). Absorb the precursor solution, drop it on the cleaned FTO substrate, make the solution cover the entire FTO surface, and form a film by spin coating, the spin coating speed is 3000rpm, and the time is 20s. Then sintered at 510 °C for 30 min in a muffle furnace. Then, measure 461 mg of lead iodide (PbI 2 ), 159 mg CH 3 NH 3 I powder, 78 mg dimethyl sulfoxide mixed with 600 mg N,N-dimethylformamide (DMF), stirred at room temperature for 1 hour to form CH 3 NH 3 PB 3 Perovskite precursor solution. Using this...

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Abstract

The invention relates to a preparation method for an organic / inorganic hybrid perovskite thin film and a solar cell. The chemical formula of the perovskite thin film is ABX3, wherein A is positive ions of organic amine, and preferably selected from at least one kind of CH3NH3<+>, NH2-CH=NH2<+> and C4H9NH3<+>; B is selected from at least one kind of Pb<2+>, Sn<2+>, Ge<2+>, Co<2+>, Fe<2+>, Mn<2+>, Cu<2+> and Ni<2+>; and X is selected from at least one kind of Cl<->, Br<-> or I<->. The preparation method comprises the steps of (1) preparing an ABX3 thin film on a substrate; and (2) performing annealing treatment on the thin film obtained in the step (1) by a microwave radiation processing manner, wherein the microwave power is 50-500W, the sample temperature is 50-150DEG C, and the microwave processing time is 0.5-5min. The preparation method provided by the invention is short in time, low in energy consumption, high in production efficiency, simple in process, mild in preparation conditions, easy to operate and wide in application prospects.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a method for preparing a thin film for a solar cell, and more specifically, to a method for preparing an organic-inorganic hybrid perovskite thin film and a perovskite solar cell. Background technique [0002] With the development of human society, the demand for energy is increasing day by day. As a clean and non-polluting energy source, solar energy has received extensive attention and in-depth research at home and abroad. Solar cells based on organic-inorganic hybrid perovskite films are a new type of solar cells developed in recent years, and their advantages are very prominent: 1. Organic-inorganic hybrid perovskite materials are easy to manufacture and low in cost; 2. More suitable bandgap width (1.5-2.3eV), larger range of light absorption; 3. The charge diffusion length is up to micron level, and the charge lifetime is longer. Therefore, perovskite solar cells and r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/44H01L51/48H01L51/46
CPCH10K85/00H10K30/80H10K30/00Y02E10/549Y02P70/50
Inventor 杨松旺曹启鹏高潜潜刘岩
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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