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Graphene aerogel-based laminated perovskite solar cell and preparation thereof

A technology of graphene airgel and solar cells, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problem of fewer batteries, and achieve the effect of simple structure, simplified structure, and improved interface contact

Active Publication Date: 2019-09-27
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Generally speaking, most of the tandem perovskite solar cells reported so far use tin perovskite and traditional solar cells as the top and bottom cells of the tandem cell respectively, and there are few cells that completely use the perovskite material as a series structure. At the same time, there is a lack of reports on the application of graphene materials alone as back electrodes in tandem perovskite solar cells

Method used

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  • Graphene aerogel-based laminated perovskite solar cell and preparation thereof
  • Graphene aerogel-based laminated perovskite solar cell and preparation thereof
  • Graphene aerogel-based laminated perovskite solar cell and preparation thereof

Examples

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Effect test

Embodiment 1

[0041] (1) Take 20ml of graphene oxide solution with a concentration of 2mg / ml, add 200mg of ascorbic acid, after ultrasonication, put it in a reaction kettle at 95°C for 3h for reduction, and vacuum freeze-dry to prepare graphene airgel;

[0042] (2) Graphene airgel 20mg obtained in step (1) is transferred in the agate mortar, adds 4ml ethanol and grinds into paste;

[0043] (3) Sequentially spin-coat TiO on the FTO conductive substrate 2 layer and ZrO 2 The insulating layer is then subjected to high-temperature annealing treatment, the sintering temperature is 500° C., and the sintering time is 30 minutes.

[0044] (4) Add pasty graphene airgel slurry (coating thickness is 10 μm) on the surface after sintering in step (3), and heat at 100°C for 10min to form a graphene airgel film layer;

[0045] (5) Coating 20 μl concentration on the graphene airgel film layer formed after heating in step (4) is 1.0MCH 3 NH 3 PB 2 The Br perovskite precursor solution was annealed at 60...

Embodiment 2

[0051] (1) Take 20ml of graphene oxide solution with a concentration of 10mg / ml, carry out high-temperature reduction, put it in a reaction kettle for 3h at 180°C, and vacuum freeze-dry to prepare graphene airgel;

[0052] (2) Graphene airgel 40mg obtained in step (1) is transferred in the agate mortar, adds 2ml ethanol and grinds into paste;

[0053] (3) Sequentially spin-coat TiO on the FTO conductive substrate 2 layer and ZrO 2 The insulating layer is then subjected to high-temperature annealing treatment, the sintering temperature is 400° C., and the sintering time is 45 minutes.

[0054] (4) Add pasty graphene airgel slurry (coating thickness is 20 μm) on the surface after sintering in step (3), and heat at 50°C for 20min to form a graphene airgel film layer;

[0055] (5) Coating 20 μl concentration on the graphene airgel film layer formed after heating in step (4) is 1.5MCH 3 NH 3 PB 2.5 Br 0.5 The perovskite precursor solution was annealed at 80 °C for 20 min and ...

Embodiment 3

[0058] (1) Take 20ml of graphene oxide solution with a concentration of 5mg / ml, carry out high-temperature reduction, put it in a reaction kettle for 3h at 180°C, and vacuum freeze-dry to prepare graphene airgel;

[0059] (2) Graphene airgel 10mg obtained in step (1) is transferred in the agate mortar, adds 1ml ethanol and grinds into paste;

[0060] (3) Sequentially spin-coat TiO on the FTO conductive substrate 2 layer and Al 2 o 3 The insulating layer is then subjected to high-temperature annealing treatment, the sintering temperature is 450° C., and the sintering time is 30 minutes.

[0061] (4) Add pasty graphene airgel slurry (coating thickness is 15 μm) on the surface after sintering in step (3), and heat at 80°C for 15min to form a graphene airgel film layer;

[0062] (5) Coating 20 μl concentration on the graphene airgel film layer formed after heating in step (4) is 1.5MCH 3 NH 3 PB 3 The perovskite precursor solution was annealed at 80 °C for 20 min and cooled ...

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Abstract

The invention relates to a graphene aerogel-based laminated perovskite solar cell and preparation thereof. Particularly, the preparation comprises steps: (1) after a graphene oxide aqueous solution is taken for reduction, through vacuum freeze drying, the graphene aerogel is made; (2) ethanol is added, a paste slurry is obtained through grinding, the paste slurry is applied to the surface of a conductive substrate with an oxide electron transport layer and an insulating layer, and heating processing is carried out; (3) dispensing of a mixed perovskite precursor solution containing lead, iodine and / or bromine is carried out, and annealing and cooling to a room temperature are carried out; and (4) continuous dispensing of another mixed perovskite precursor solution containing tin, iodine and / or bromine is carried out, annealing and cooling are carried out, and preparation is completed. In comparison with the prior art, the cell structure is simpler, two kinds of perovskite absorb different intensities of sunlight, utilization of solar energy is increased; and in addition, due to the use of the graphene aerogel, the cell cost can be reduced, the hole mobility is improved, the cell efficiency is further enhanced, and the application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of perovskite solar cells, and relates to a stacked perovskite solar cell based on graphene airgel and its preparation. Background technique [0002] In the past ten years, different kinds of organic solar cells have received more and more attention. For single p-n junction organic devices, due to the Shockley-Queisser limitation, the conversion efficiency will have an upper limit. At the same time, the solar energy utilization efficiency of single-junction cells is low due to the short exciton diffusion distance, low charge mobility, and narrow absorption spectrum of organic materials. In order to absorb more light energy and improve power conversion efficiency (PCE), one of the ways is to use a stacked structure. The stacked structure can make up for the shortcoming of the narrow solar energy absorption spectrum of the single-junction structure, and can also increase the open circuit voltage. Therefore,...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/44H01L51/48
CPCH10K30/15H10K30/152H10K30/151H10K30/81Y02E10/549Y02P70/50
Inventor 范心怡李斌芮一川李天朋史军辉
Owner SHANGHAI UNIV OF ENG SCI
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