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Layered perovskite structure material and application in methylamine lead perovskite thin-film solar cell

A perovskite structure, layered technology, applied in the field of solar cells, can solve the problems of water and oxygen sensitivity, poor stability, difficult to control the nucleation and crystallization process of methylamine lead iodine film, achieve uniform morphology and improve blocking ability. , the effect of improving stability and service life

Inactive Publication Date: 2015-10-21
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the field of methylamine lead iodine perovskite thin film solar cells still faces two main problems: 1) the nucleation and crystallization process of methylamine lead iodine thin film is difficult to control; 2) the stability of methylamine lead iodine perovskite thin film material Poor resistance, especially sensitive to water and oxygen in humid air
Applying the layered perovskite structure based on polymers with primary amino groups in side chains to methylamine lead iodine perovskite thin-film solar cells, so far, there are no relevant literature and patent reports at home and abroad.

Method used

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  • Layered perovskite structure material and application in methylamine lead perovskite thin-film solar cell
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  • Layered perovskite structure material and application in methylamine lead perovskite thin-film solar cell

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Implementation Example 1: Preparation of methylamine lead iodide perovskite thin-film solar cell device by one-step method.

[0049] PbCl 2 , PbI 2 and CH 3 NH 3 I was dissolved in N,N-dimethylformamide (DMF) solution with a total mass fraction of 45% according to a molar ratio of 1:1:4, and stirred at room temperature for 12 hours. Clean the surface of ITO glass. After cleaning the surface with ultraviolet ozone for 10 minutes, spin-coat the conductive polymer PEDOT:PSS on the glass at a speed of 4000rpm, then heat at 140°C for 10min, and then spin-coat the surface of PEDOT:PSS at a speed of 3000rpm PEI·HI (10mg / ml, methanol solution) for modification. Then the perovskite solution was spin-coated at a speed of 4000rpm, and a perovskite film was prepared on the surface. After spin coating, the substrate was placed on a hot stage and heated at 100°C for 60min. PCBM (20 mg / ml, chlorobenzene solution) was spin-coated on the surface of the perovskite film at a speed o...

Embodiment 2

[0051] Implementation Example 2: Preparation of methylamine lead iodine perovskite thin-film solar cell device by two-step method.

[0052] Configure 462mg / ml of PbI respectively 2 / DMF solution and 20mg / ml of CH 3 NH 3 I / isopropanol solution. Clean the surface of ITO glass in the same way. After cleaning the surface with ultraviolet ozone for 10 minutes, spin-coat the conductive polymer PEDOT:PSS on the glass at a speed of 4000rpm, then heat at 140°C for 10min, and spin-coat PEI on the surface of PEDOT:PSS at a speed of 3000rpm. HI (10 mg / ml, methanol solution) was used for modification. Then PbI 2 The solution was spin-coated at 4000 rpm, followed by spin-coating CH 3 NH 3 I solution. After spin coating, the substrate was placed on a hot stage and heated at 100°C for 10 min. PCBM (20 mg / ml, chlorobenzene solution) was spin-coated on the surface of the perovskite film at a speed of 1500 rpm. Finally, under high vacuum conditions, Ag electrodes are vapor-deposited to ...

Embodiment 3

[0054] Implementation Example 3: Preparation of methylamine-lead-iodide perovskite thin-film solar cell device.

[0055] PbCl 2 , PbI 2 and CH 3 NH 3 I was dissolved in N,N-dimethylformamide (DMF) solution with a total mass fraction of 45% according to a molar ratio of 1:1:4, and stirred at room temperature for 12 hours. Clean the surface of ITO glass. After cleaning the surface with ultraviolet ozone for 10 minutes, spin-coat the conductive polymer PEDOT:PSS on the glass at a speed of 4000rpm, then heat at 140°C for 10min, and then spin-coat the surface of PEDOT:PSS at a speed of 3000rpm PTN·HI (10mg / ml, isopropanol solution) for modification. Then the perovskite solution was spin-coated at a speed of 4000rpm, and a perovskite film was prepared on the surface. After spin coating, the substrate was placed on a hot stage and heated at 100°C for 60min. PCBM (20 mg / ml, chlorobenzene solution) was spin-coated on the surface of the perovskite film at a speed of 1500 rpm. Fin...

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Abstract

The invention provides a layered perovskite structure material and application in a methylamine lead perovskite thin-film solar cell. The general formula of the chemical structure is A*[PbX3], wherein the A is a polymer whose the side chain contains a p-amino group and comprises a polymer whose main chain is a conjugated structure and a polymer whose main chain is saturated carbon-carbon or carbon-nitrogen chain; and the X is one kind or multiple kinds of chlorine, bromine or iodine. The material is applied in a methylamine lead perovskite thin-film solar cell. According to the invention, film forming quality of a methylamine lead perovskite active layer is effectively improved; the material has high optical performance and uniform shapes and the size of a grain reaches micron order; energy level at the interface can be well adjusted and controlled, well energy level matching is achieved, energy level potential barriers of the interface are reduced, performance of devices are improved, energy conversion efficiency reach 16.0% and manufacturing of the cell is highly repeatable; and resisting ability for vapor in air of the device can be improved and stability of the cell is improved.

Description

technical field [0001] The invention belongs to the technical field of solar cells. Background technique [0002] Among many new solar cells, perovskite thin-film solar cells based on organic-inorganic hybrid methylamine lead iodide as the active layer have high light absorption coefficient, long exciton lifetime, low binding energy, and excellent current-carrying capacity. It has the advantages of low cost, simple preparation process, high photoelectric conversion rate, and easy realization of large-area flexible devices. It can achieve photoelectric conversion efficiency comparable to silicon-based solar cells, and has become the most competitive in the field of thin-film photovoltaic technology today. power battery type. At present, the certified efficiency of this type of perovskite solar cell reported in the literature has reached as high as 17.9% [Nat.Photon, 2014, 8, 506-514]. The highest efficiency record for batteries has exceeded 20% [National Renewable Energy La...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/46
CPCH10K85/10Y02E10/549H10K85/50
Inventor 李璠姚凯王晓峰
Owner NANCHANG UNIV
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