Formamidino perovskite thin film, perovskite battery assembly and preparation method of formamidino perovskite thin film

A formamidine-based perovskite and amidine-based perovskite technology, applied in the field of perovskite solar cells, can solve problems such as difficult control, achieve the effects of saving dosage, reducing production costs, and being easy to scale up production

Pending Publication Date: 2021-06-11
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the nucleation and growth process of formamidinyl perovskite is more difficult to control than that of methylamino perovskite, which easily transforms into an optically inactive delta phase perovskite (yellow phase formamidinyl perovskite) at low temperature. )
In addition, the perovskite thin films of formamidine groups have been prepared by anti-solvent technology, which cannot be further scaled up at low cost to prepare high-efficiency large-area perovskite components.

Method used

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  • Formamidino perovskite thin film, perovskite battery assembly and preparation method of formamidino perovskite thin film
  • Formamidino perovskite thin film, perovskite battery assembly and preparation method of formamidino perovskite thin film
  • Formamidino perovskite thin film, perovskite battery assembly and preparation method of formamidino perovskite thin film

Examples

Experimental program
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Effect test

Embodiment 1

[0058] refer to figure 1 , a perovskite cell assembly, comprising an FTO transparent conductive substrate 101, a tin dioxide electron transport layer 102, a formamidinium-based perovskite light-absorbing layer 103, a Spiro-OMeTAD hole transport layer 104 and Metal electrode 105 . The FTO transparent conductive substrate 101 is etched to form an etch pattern P1 106, and the tin dioxide electron transport layer 102, the formamidinium-based perovskite light absorption layer 103 and the Spiro-OMeTAD hole transport layer 104 are etched to form an etch pattern P2 107, cutting the metal electrode 105 to form an etching pattern P3 108.

[0059] The preparation method of the perovskite battery component includes the following steps:

[0060] (1) Prepare the transparent conductive substrate

[0061] First, cut the FTO conductive glass into the required size (10cm×10cm), and use the laser to etch the P1. Then, the glass was ultrasonically cleaned with glass cleaning solution, pure wa...

Embodiment 2

[0079] The difference between this example and Example 1 is that the perovskite composition ratio in the precursor solution of this example is FAPbI 3 , the composition of the precursor solution is: 143 mg of formamidine iodide, 461 mg of lead iodide, and 900 μL of DMF. And add high donor number solvent DMPU 130μL, DMPU and perovskite component FAPbI 3 The molar mass ratio is 1:1. Other operations are the same as in Example 1.

[0080] Efficiency test: Under AM 1.5G sunlight intensity, the effective area is 65cm 2 100cm measured under the mask 2 The photoelectric conversion efficiency of the perovskite cell module is 10%.

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Abstract

The invention discloses a formamidino perovskite thin film, a perovskite battery assembly and a preparation method of the formamidino perovskite thin film. The preparation raw materials of the formamidino perovskite thin film comprise a formamidino perovskite precursor solution, and the perovskite precursor solution comprises a perovskite component and a high donor number solvent. By coating the formamidino perovskite precursor solution, and carrying out drying and annealing treatment, the formamidino perovskite thin film is obtained. According to the present invention, the perovskite precursor solution contains the high-donor-number solvent, the high-donor-number solvent and the perovskite component in the perovskite precursor solution are combined according to a specific proportion, so that a stable and compact transition phase crystal nucleus can be formed in the film forming process, the generation of inactive yellow-phase formamidino perovskite is inhibited, and the quality of the large-area perovskite thin film is improved, and accordingly the photoelectric conversion efficiency of the perovskite battery assembly is improved.

Description

technical field [0001] The invention relates to the technical field of perovskite solar cells, in particular to a formamidine-based perovskite film, a perovskite cell component and a preparation method thereof. Background technique [0002] As a new generation of thin-film solar cells, perovskite solar cells have gradually shown their huge application potential, including high photoelectric conversion efficiency, low-cost production and preparation processes, and have huge advantages compared to current crystalline silicon solar cells. The wide application of solar cells will provide an effective solution to problems such as environmental pollution and energy shortage. [0003] Although perovskite solar cells have excellent photoelectric conversion efficiency, their high efficiency is still limited to <1 cm 2 on the effective area. When the perovskite film is scaled up, the defects in the perovskite light-absorbing layer and at the grain boundaries will increase several...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/46H01L51/42H01L51/48
CPCH10K71/12H10K71/15H10K85/60H10K30/15H10K30/151H10K30/152Y02E10/549
Inventor 黄福志卜童乐程一兵
Owner WUHAN UNIV OF TECH
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