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Efficient and stable perovskite solar cell based on novel ionic liquid methylamine formate as well as preparation method and application of perovskite solar cell

A technology of solar cells and methylamine formate, which is applied in semiconductor/solid-state device manufacturing, circuits, photovoltaic power generation, etc., can solve the problems of easy transformation into yellow non-perovskite phase, reduce film stability and device efficiency, and achieve good Development prospect, good solvent volatilization, good solubility effect

Active Publication Date: 2020-11-17
NANJING TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem solved by the present invention is: Aiming at the problem that the formamidinyl perovskite film is easily transformed into a yellow non-perovskite phase under high humidity conditions, which reduces the stability of the film and the efficiency of the device, a novel ionic liquid based Preparation of high-efficiency and stable formamidine-based perovskite solar cells by dissolving lead iodide in methylamine formate and its preparation method and application

Method used

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  • Efficient and stable perovskite solar cell based on novel ionic liquid methylamine formate as well as preparation method and application of perovskite solar cell
  • Efficient and stable perovskite solar cell based on novel ionic liquid methylamine formate as well as preparation method and application of perovskite solar cell
  • Efficient and stable perovskite solar cell based on novel ionic liquid methylamine formate as well as preparation method and application of perovskite solar cell

Examples

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Embodiment 1

[0056] This example is the preparation of formamidine lead iodine perovskite solar cell based on methylamine formate of the present invention, so as to fully understand the present invention, the experimental humidity condition is greater than 80%. It mainly includes the following steps:

[0057] Step 1) Dissolve 31mL of methylamine in 13mL of ethanol solution, place in a round bottom flask and stir at minus 16°C.

[0058] Step 2) Dilute 7 mL of formic acid solution in 31 mL of methanol solution.

[0059] Step 3) Slowly add the solution of step 2) into the solution of step 1), stir for 2 hours and then rotary evaporate to obtain methylamine formate.

[0060] Step 4) Clean the ITO conductive glass, the sequence is ethanol, cleaning agent, ultrapure water, acetone, ultrasonic in ethanol for 15 minutes each, blow dry with nitrogen, and dry in an oven at 100°C for 30 minutes.

[0061] Step 5) Weigh 1.45M lead iodide, completely dissolve it in 1ml methylamine formate solvent, and...

Embodiment 2

[0074] This example is the perovskite solar cell prepared based on methylamine formate of the present invention, in order to fully understand the present invention, the experimental humidity condition is greater than 80%. It mainly includes the following steps:

[0075] Step 1) Dissolve 31mL of methylamine in 13mL of ethanol solution, place in a round bottom flask and stir at minus 16°C.

[0076] Step 2) Dilute 7 mL of formic acid solution in 31 mL of methanol solution.

[0077] Step 3) Slowly add the solution of step 2) into the solution of step 1), stir for 2 hours and then rotary evaporate to obtain methylamine formate.

[0078] Step 4) Clean the ITO conductive glass, the sequence is ethanol, cleaning agent, ultrapure water, acetone, ultrasonic in ethanol for 15 minutes each, blow dry with nitrogen, and dry in an oven at 100°C for 30 minutes.

[0079] Step 5) Weigh 1.5M lead iodide and 0.05M PbBr 2 It was dissolved in 1 ml of methylamine formic acid solvent, and stirred ...

Embodiment 3

[0092] This example is the perovskite solar cell prepared based on methylamine formate of the present invention, in order to fully understand the present invention, the experimental humidity condition is greater than 80%. It mainly includes the following steps:

[0093] Step 1) Dissolve 31mL of methylamine in 13mL of ethanol solution, place in a round bottom flask and stir at minus 16°C.

[0094] Step 2) Dilute 7 mL of formic acid solution in 31 mL of methanol solution.

[0095] Step 3) Slowly add the solution of step 2) into the solution of step 1), stir for 2 hours and then rotary evaporate to obtain methylamine formate.

[0096] Step 4) Clean the ITO conductive glass, the sequence is ethanol, cleaning agent, ultrapure water, acetone, ultrasonic in ethanol for 15 minutes each, blow dry with nitrogen, and dry in an oven at 100°C for 30 minutes.

[0097] Step 5) Weigh 1M lead iodide and dissolve it in 1ml methylamine formate solvent, and stir at 70°C for 6 hours.

[0098] S...

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Abstract

The invention relates to an efficient and stable perovskite solar cell prepared by dissolving lead halide PbX2 (X = Cl, Br, I), lead acetate, lead sulfate and the like based on novel ionic liquid methylamine formate as well as a preparation method and application of the perovskite solar cell, and belongs to the field of optoelectronic materials and devices. The preparation method comprises the following steps: dissolving PbI2 into a methylamine formate solvent according to the concentration of 1-1.5 M, spin-coating PbI2 on an ITO substrate deposited with SnO2 by using a heating spin-coating method, annealing to form a compact, uniform and stable PbI2 film, spin-coating a cation solution on the PbI2 film, annealing to form stable formamidine lead iodine perovskite, and completely operatingthe whole process in air. And then spin-coating a Spiro-OMeTAD hole transport layer on the thin film, and evaporating a modification layer MoO3 and a metal electrode by using a vacuum evaporation technology to complete the preparation of the device.

Description

technical field [0001] The present invention relates to a method for preparing a high-efficiency and stable perovskite solar cell based on a novel ionic liquid methylamine formate, especially a method for preparing high-efficiency and high-stability formamidine in a high-humidity environment by using an ionic liquid. A perovskite solar cell belongs to the field of optoelectronic materials and technologies. Background technique [0002] Facing the current energy shortage problem, using the photovoltaic effect to convert solar energy into electrical energy has become one of the important methods to meet energy demand. In recent years, perovskite solar cells have attracted people's attention due to their low cost, simple preparation process, and high photoelectric conversion efficiency. In just a few years, their photoelectric conversion efficiency has reached 25.2%. However, because the preparation process requires nitrogen protection and needs to be operated in a low-humidit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K85/00H10K30/15Y02E10/549
Inventor 陈永华芦荟惠炜夏英东黄维
Owner NANJING TECH UNIV
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