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Preparation method of perovskite microcrystalline film and solar cell device

A solar cell and perovskite technology, which is applied in the field of preparation of new perovskite microcrystalline films, can solve the problems of small grain size and limited spin-coating area, and achieve small defect density, reduce energy consumption, and crystal grain large size effect

Active Publication Date: 2021-01-15
PEKING UNIV
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  • Description
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  • Application Information

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Problems solved by technology

In order to overcome problems such as relying on ultraviolet ozone treatment, limited spin coating area, and small grain size in the traditional perovskite spin coating step, the purpose of the present invention is to provide a large area, low cost, high performance, process simplification, commercial Preparation method of perovskite thin film and perovskite battery with promising prospects

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  • Preparation method of perovskite microcrystalline film and solar cell device
  • Preparation method of perovskite microcrystalline film and solar cell device

Examples

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Embodiment 1

[0026] This example provides a method for mechanically preparing a perovskite microcrystalline film. The specific preparation steps are as follows: CH 3 NH 3 I and PbI 2 Configured as 1M CH 3 NH 3 PB 3The precursor solution was heated and stirred overnight at 80°C to form a saturated precursor solution, and then the temperature was slowly cooled to room temperature, and an appropriate amount of perovskite single crystal was grown by dissolving at high temperature and evaporating the solvent for crystallization at lower temperature. Take out the crystals for later use. Mix 0.1 g of pre-synthesized perovskite microcrystals with 5 mg of poly-3-hexylthiophene, 10 mg of aluminum oxide, 500 μL of chlorobenzene and ultrasonically for 0.5 h each, and use a planetary ball mill to prepare uniform and well-dispersed perovskite single crystal slurry, the ball milling time is 1h. A micro-tablet press is used to press the slurry into a film in the range of 1kpa-1Mpa, heat and solidify...

Embodiment 2

[0028] like figure 1 , this embodiment provides a method for preparing a perovskite solar cell with a perovskite microcrystalline film by a mechanical method.

[0029] (1) First, the FTO conductive glass was etched by chemical etching, and then ultrasonically cleaned in water, acetone, and ethanol for 30 minutes before use. (2) Preparation of dense layer: the diluted TiO 2 The precursor solution was deposited on the surface of FTO by spray pyrolysis and sintered at 150°C to serve as a hole blocking layer with a film thickness of 200nm. (3) Synthesis of perovskite microcrystals: configure a certain concentration of CH 3 NH 3 PB 3 Precursor solution, using high temperature dissolution, cooling and crystallization to cultivate a proper amount of perovskite single crystal. (4) Preparation of perovskite layer: Mix pre-synthesized perovskite microcrystals with poly-3-hexylthiophene, aluminum oxide and chlorobenzene, and prepare uniform and well-dispersed perovskite by ball mill...

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Abstract

The invention discloses a preparation method of a perovskite microcrystalline film and a solar cell device. The method comprises the following steps: mixing pre-synthesized perovskite microcrystals with a polymer binder, an inorganic dispersing agent and an organic dispersing solvent, and preparing uniform perovskite crystal slurry with good dispersity by using a ball milling method; pressing themicrocrystalline perovskite crystal slurry on a substrate material by using a preparation mode of mechanical stamping, scrape coating and printing, and annealing to form a film, wherein a solar cell can be assembled. The method is a brand-new perovskite thin film preparation process, and the obtained perovskite microcrystalline film is good in film-forming property and high in repeatability, getsrid of an ultraviolet ozone treatment step, can be prepared in a large area, and has great development potential and market application prospect.

Description

technical field [0001] The invention belongs to the field of perovskite solar cells, and more specifically relates to a preparation method of a novel perovskite microcrystalline film and a perovskite solar cell prepared based on the method. Background technique [0002] Since the first perovskite solar cell was reported in 2009, research on perovskite solar cells has become popular all over the world. At present, the highest battery efficiency certified by authoritative organizations has exceeded 24%, which has exceeded the highest efficiency of polycrystalline silicon solar cells that have been commercialized for many years, and is similar to the efficiency of monocrystalline silicon solar cells. Compared with polycrystalline silicon and monocrystalline silicon solar cells, perovskite cells have the advantages of cheap materials, simple process, low equipment requirements, and low cell cost. These advantages illustrate the potential of perovskite solar cells to replace hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/48
CPCH10K71/12H10K30/10H10K30/80Y02E10/549Y02P70/50
Inventor 朱瑞张玉琢吴疆罗德映
Owner PEKING UNIV
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