Perovskite solar cell preparation method based on full-coating process

A solar cell and coating process technology, which is applied in the field of solar cells, can solve problems such as limiting the industrialization of perovskite solar cells and high cost, and achieve optimization of microscopic morphology and physical and chemical properties, simplifying the manufacturing process, eliminating Potentially Harmful Effects

Inactive Publication Date: 2015-03-25
昆山惟华光能有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because it cannot be effectively applied to the preparation of large-area devices and the high

Method used

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Examples

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Effect test

Embodiment 1

[0028] TiO coating on cleaned fluorine tin oxide (FTO) or indium tin oxide (ITO) glass substrates 2 nano solution, and annealed at 150°C for 10 minutes to prepare an electron transport layer; coat 200-300mg / ml of PbI on the substrate 2 Solution, the solvent is at least one of dimethylformamide (DMF) and dimethyl sulfoxide (DMSO); after drying with hot air, apply 8mg / ml of CH 3 NH 3 I isopropanol solution; after drying with hot air, directly screen-print the low-temperature carbon electrode, and then anneal at 70-150° C. for 10 minutes to obtain a perovskite solar cell.

Embodiment 2

[0030] TiO coating on cleaned fluorine tin oxide (FTO) or indium tin oxide (ITO) glass substrates 2 Nano solution, and annealed at 150°C for 10min to prepare an electron transport layer; coat PbI on the substrate 2 、CH 3 NH 3 I and CH 3 NH 3 DMF mixed solution of Cl; after hot air drying, screen-print low-temperature carbon paste, and anneal at 100°C for 10-30 minutes to prepare perovskite solar cells.

Embodiment 3

[0032] Coated titanium tetraisopropoxide solution on the cleaned fluorine tin oxide (FTO) glass substrate, annealed at 500°C for 30min to form TiO 2 Dense layer, after cooling to room temperature, coat TiO diluted with ethylene glycol methyl ether or ethanol 2 Slurry, annealed again at 500°C for 30min to form TiO 2 mesoporous structure. After the substrate was cooled to room temperature, the TiO 2 Coating PbI on the mesoporous structure 2 solution, the concentration is 200-300mg / ml, the solvent is DMF or DMSO; after drying with hot air, apply 8mg / ml of CH 3 NH 3 I isopropanol solution; dry with hot air, then screen-print low-temperature carbon electrodes, and finally heat at 70-150° C. for 10 minutes to obtain a perovskite solar cell.

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Abstract

The invention discloses a perovskite solar cell preparation method based on the full-coating process, and relates to solar cells. The perovskite solar cell preparation method based on the full-coating process is low in cost, high in efficiency and industrialized. The method comprises the steps that (1) an electron transfer layer, a perovskite active layer and a hole transfer layer are sequentially prepared on a transparent conductive substrate by the adoption of the coating process, and slot-die coating or spraying-type coating is adopted in the coating process; (2) the hole transfer layer is coated with a top electrode, and screen printing and knife coating are adopted for coating. The problem of the process and cost of evaporation and precious metal electrode printing are solved, and the problem that the perovskite layer may be damaged by high-temperature carbon paste is solved. The one-step annealing method is adopted, in other words, annealing is carried out at the temperature ranging from 70 DEG C to 150 DEG C after coating is carried out on all the functional layers. The manufacturing technology is further simplified, and the device performance and stability can be effectively improved.

Description

technical field [0001] The invention relates to a solar cell, in particular to a method for preparing a perovskite solar cell based on a full coating process. Background technique [0002] A perovskite solar cell refers to a solar cell that uses a large class of materials with a perovskite crystal structure as the photoelectric conversion active layer. This type of material has a suitable band gap, high light absorption coefficient, and excellent carrier generation and separation capabilities, coupled with its simple and low-cost thin film preparation method, making perovskite solar cells have great potential. prospect. At present, the perovskite thin films of perovskite solar cells are mainly prepared in the laboratory by methods such as spin coating, soaking, and high vacuum thermal evaporation; the electrodes are prepared by thermal evaporation or printing metal electrodes. At present, the efficiency of small-area devices is close to 20%. However, because it cannot be ...

Claims

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Application Information

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IPC IPC(8): H01L51/48
CPCH10K30/81H10K30/00H10K71/00Y02E10/549Y02P70/50
Inventor 王保增陈凯武蔡龙华寇旭梁禄生陈伟中田清勇范斌
Owner 昆山惟华光能有限公司
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