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Method for preparing formamidino FAPbI3 perovskite solar cell through one-step method at low and medium temperature in air and application of formamidino FAPbI3 perovskite solar cell

A solar cell and perovskite technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as poor phase stability, and achieve the effects of low cost, high conversion efficiency, and uniform crystallinity

Pending Publication Date: 2022-04-01
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0004] The technical problem that the present invention solves is for formamidinyl FAPbI 3 Perovskite has poor phase stability in a humid environment, requires an annealing temperature above 150 °C in conventional methods, and needs to add additional additives. A method for preparing formamidinyl FAPbI3 perovskite solar cells by a low-temperature one-step method in air is proposed. and application

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  • Method for preparing formamidino FAPbI3 perovskite solar cell through one-step method at low and medium temperature in air and application of formamidino FAPbI3 perovskite solar cell
  • Method for preparing formamidino FAPbI3 perovskite solar cell through one-step method at low and medium temperature in air and application of formamidino FAPbI3 perovskite solar cell
  • Method for preparing formamidino FAPbI3 perovskite solar cell through one-step method at low and medium temperature in air and application of formamidino FAPbI3 perovskite solar cell

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Embodiment 1

[0047] Present embodiment is that ionic liquid methylamine acetate (MAAc) of the present invention is used as solvent to prepare formamidine base FAPbI at low temperature in air 3 A planar heterojunction perovskite solar cell is placed upright in order to fully understand the present invention. It mainly includes the following steps:

[0048] Step 1) Weigh 281.6mg of lead iodide and 81.5mg of iodoformamidine, and dissolve the two in 1ml of MAAc solvent.

[0049] Step 2) React the precursor solution prepared in step 1) at 90° C. for 36 hours, with precise temperature and time control.

[0050] Step 3) Cleaning the ITO conductive glass, the sequence is ethanol, ultrapure water, adding cleaning agent, ultrapure water, acetone, and ethanol, respectively, sonicating for 10 minutes. And blow dry with nitrogen to obtain a clean conductive glass substrate.

[0051] Step 4) Treat the cleaned ITO substrate in step 2) with ultraviolet and ozone for 15 minutes.

[0052] Step 5) Take S...

Embodiment 2

[0065] Present embodiment is that ionic liquid methylamine acetate (MAAc) of the present invention is used as solvent to prepare formamidine base FAPbI at low temperature in air 3 Inverted planar heterojunction perovskite solar cell for a full understanding of the invention. It mainly includes the following steps:

[0066] Step 1) Weigh 281.6mg of lead iodide and 81.5mg of iodoformamidine, and dissolve the two in 1ml of MAAc solvent.

[0067] Step 2) React the precursor solution prepared in step 1) at 90° C. for 36 hours, with precise temperature and time control.

[0068] Step 3) Cleaning the ITO conductive glass, the sequence is ethanol, ultrapure water, adding cleaning agent, ultrapure water, acetone, and ethanol, respectively, sonicating for 10 minutes. And blow dry with nitrogen to obtain a clean conductive glass substrate.

[0069] Step 4) Treat the cleaned ITO substrate in step 2) with ultraviolet and ozone for 15 minutes.

[0070] Step 5) Take NiOx 10mg and complet...

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Abstract

The invention relates to a method for preparing a formamidino FAPbI3 perovskite solar cell at medium and low temperature in air and application, and belongs to the field of optoelectronic materials and devices. The preparation method comprises the following steps: dissolving lead iodide and iodoformamidine in a stoichiometric ratio of 1: 1 in a protic ionic liquid solution to prepare a perovskite precursor solution, and stirring and reacting at the high temperature of 90 DEG C for 36 hours; in the air, the precursor solution is respectively spin-coated on an ITO or FTO conductive substrate with a hole transport layer or an electron transport layer through a one-step heating spin-coating technology, and the conversion of the black-phase perovskite can be realized at normal temperature. And then spin-coating an electron transport layer or a hole transport layer on the thin film, and evaporating a modification layer and a metal Ag electrode by using a vacuum evaporation technology.

Description

technical field [0001] The invention relates to a low-temperature one-step method for preparing formamidinyl FAPbI based on a proton-type ionic liquid as a solvent in air 3 Method and application of perovskite solar cells, especially a kind of formamidino FAPbI 3 The invention discloses a new method for preparing perovskite solar cells at low temperature in air, belonging to the field of optoelectronic materials and technologies. Background technique [0002] As a direct bandgap semiconductor with ionic properties, organic-inorganic hybrid perovskite has attracted extensive research attention due to its excellent optoelectronic properties and solution-based preparation. With the continuous optimization of perovskite and related materials, the photoelectric conversion efficiency of perovskite cells has been rapidly improved. The current world certified efficiency has reached 25.5%, which is already comparable to silicon-based perovskite solar cells. [0003] The high perovs...

Claims

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Application Information

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IPC IPC(8): H01L51/48H01L51/42
CPCY02E10/549
Inventor 陈永华晁凌锋牛婷婷黄维
Owner NORTHWESTERN POLYTECHNICAL UNIV
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