Method for preparing FAPbI3 perovskite thin film and efficient perovskite solar cell by using FAPbI3 perovskite thin film

A solar cell and perovskite technology, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problems of reducing short-circuit current density, affecting device stability, widening band gap, etc., and achieving excellent energy conversion efficiency.

Pending Publication Date: 2022-06-28
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Previous studies mainly by doping MA + (Methylamine), Cs + , or Br - Plasma to obtain pure α-phase FAPbI 3 perovskite, but doping these ions will blue-shift the UV-visible light absorption peak of the perovskite material, which will lead to a widening of the band gap of this system
Although the open circuit voltage of the device is increased (V OC ), but reduces the short-circuit cu

Method used

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  • Method for preparing FAPbI3 perovskite thin film and efficient perovskite solar cell by using FAPbI3 perovskite thin film
  • Method for preparing FAPbI3 perovskite thin film and efficient perovskite solar cell by using FAPbI3 perovskite thin film
  • Method for preparing FAPbI3 perovskite thin film and efficient perovskite solar cell by using FAPbI3 perovskite thin film

Examples

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Comparison scheme
Effect test

Embodiment 1

[0048] This example is ammonium acetate as FAPbI 3 Perovskite precursor solution additives prepare pure phase FAPbI with low density of defect states and large grain size by adjusting the amount of ammonium acetate added 3 Perovskite thin films and their perovskite solar cells, in order to be fully understood, the laboratory humidity conditions of the present invention are greater than 70%. It mainly includes the following steps:

[0049] Step 1) The etched FTO conductive glass is sonicated in ethanol, ultrapure water plus cleaning agent, ultrapure water, and ethanol for 15 minutes each. After drying with nitrogen, it was dried in an oven at 100° C. for 30 minutes to obtain a clean FTO substrate.

[0050] Step 2) Weigh lead iodide and iodoformamidine in a ratio of 1.2:1 to weigh 662.4 mg of lead iodide, 206.6 mg of iodoformamidine and 130.4 mg of ammonium acetate additive with a mass ratio of 15%, and dissolve in 1 mL of N,N - Dimethylformamide (DMF) solvent, and stirred at...

Embodiment 2

[0062] This example is ammonium acetate as FAPbI 3 Perovskite precursor solution additives prepare pure phase FAPbI with low density of defect states and large grain size by adjusting the amount of ammonium acetate added 3 Perovskite thin films and their perovskite solar cells, in order to be fully understood, the laboratory humidity conditions of the present invention are greater than 70%. It mainly includes the following steps:

[0063] Step 1) The etched FTO conductive glass is sonicated in ethanol, ultrapure water plus cleaning agent, ultrapure water, and ethanol for 15 minutes each. After drying with nitrogen, it was dried in an oven at 100 °C for 30 minutes to obtain a clean FTO substrate.

[0064] Step 2) Weigh lead iodide and iodoformamidine according to the ratio of 1.2:1 to weigh 662.4 mg of lead iodide, 206.6 mg of iodoformamidine and 173.8 mg of ammonium acetate additive with a mass ratio of 20%, dissolve in 1 mL of N, N- In dimethylformamide (DMF) solvent, and ...

Embodiment 3

[0077] This example is ammonium acetate as FAPbI 3 Perovskite precursor solution additives prepare pure phase FAPbI with low density of defect states and large grain size by adjusting the amount of ammonium acetate added 3 Perovskite thin films and their perovskite solar cells, in order to be fully understood, the laboratory humidity conditions of the present invention are greater than 70%. It mainly includes the following steps:

[0078] Step 1) The etched FTO conductive glass is sonicated in ethanol, ultrapure water plus cleaning agent, ultrapure water, and ethanol for 15 minutes each. After drying with nitrogen, it was dried in an oven at 100 °C for 30 minutes to obtain a clean FTO substrate.

[0079] Step 2) Weigh lead iodide and iodoformamidine in a ratio of 1.2:1 to weigh 662.4 mg of lead iodide, 206.6 mg of iodoformamidine and 217.3 mg of ammonium acetate additive with a mass ratio of 25%, and dissolve in 1 mL of N,N - Dimethylformamide (DMF) solvent, and stirring at...

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Abstract

The invention relates to a method for preparing an FAPbI3 perovskite thin film and an efficient perovskite solar cell thereof, and belongs to the field of optoelectronic materials and devices. According to preparation of the pure-phase FAPbI3 thin film, ammonium acetate serving as an additive and a perovskite component are dissolved in N, N-dimethylformamide serving as a precursor solution through a one-step method, the solution is spin-coated on an FTO conductive substrate with an electron transport layer, the uniform and compact perovskite thin film is prepared through annealing, and the whole process is carried out in a water-free and oxygen-free glove box. Subsequent treatment is carried out on the thin film, Spiro-OMeTAD is used as a hole transport layer, and a MoO3 modification layer and a metal electrode are evaporated by using a vacuum evaporation technology so as to complete preparation of the device. The pure-phase FAPbI3 perovskite solar cell prepared by the method has excellent photoelectric conversion efficiency, and ammonium acetate is adopted as an additive, so that a pure-phase formamidino perovskite solar cell can be prepared by a one-step method.

Description

technical field [0001] The invention relates to a one-step method for preparing pure-phase FAPbI by adjusting the quality of ammonium acetate based on ammonium acetate as a precursor solution additive 3 Perovskite thin films and methods for high-efficiency perovskite solar cells, particularly a method for preparing high-efficiency pure-phase formamidine-based perovskite thin films by using additives, belong to the field of optoelectronic materials and technologies. Background technique [0002] With the continuous development of society, the environmental problems caused by traditional fossil energy have attracted more and more attention, and the development of clean energy is imminent. With the continuous increase of human demand for clean energy, solar power generation has attracted more and more attention. To date, most solar cells have been made of silicon, because the material is so good at absorbing light. However, the manufacturing cost of silicon panels is very exp...

Claims

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Application Information

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IPC IPC(8): H01L51/48H01L51/42
CPCH10K71/15H10K71/164H10K71/12H10K30/15Y02E10/549
Inventor 陈永华王殿曦杜晓琴夏英东黄维
Owner NANJING UNIV OF TECH
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