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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AI-Extracted Technical Summary

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...

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.

Application Domain

Solid-state devicesSemiconductor/solid-state device manufacturing +2

Technology Topic

Thin membraneLead iodide +17

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Examples

Experimental program(2)

Example Embodiment

[0046] Example 1

[0047] In this example, the ionic liquid acetate (MAAc) of the present invention is a solvent in the air in low temperature in the air. 3 The plane heterogeneous cooled calcium titanium mine solar cell is to be fully understood. It mainly includes the following steps:

[0048] Step 1) Weigh 281.6 mg of iodide, 81.5 mg of iodide, and dissolve the two in 1 mL of MAAC solvent.

[0049] Step 2) Configure step 1) The precursor solution is reacted at 90 ° C for 36 h, temperature and time control accurate.

[0050] Step 3) Clean the ITO conductive glass, sequentially is ethanol, ultrapure water to add cleaning agent, super pure water, acetone, and ethanol. It is blown with nitrogen to give a clean conductive glass substrate.

[0051] Step 4) Wash step 2) to clean the clean ITO substrate UV ozone treatment for 15 minutes.

[0052] Step 5) Take SNO 2 1 ml was diluted with ultrapure water into 2.67 wt%.

[0053] Step 6) Take the diluted SNO 245 μL of step 4) Treated on the ITO substrate, use a spin coater to rotate into a film, and the rotation speed is 3000 per minute for 30 seconds, and the spin coated has a SNO. 2 ITO 150 ° C is annealed for 30 min.

[0054] Step 7) The ITO conductive substrate that is annealed in step 6) is placed on the thermo coater, preheating for 5 min.

[0055] Step 8) Take step 2) The preheated ITO substrate is dried to step 7 by step 2) The preheated ITO substrate, and the film is copied, and then annealed to form a perovskite film. The rotational speed of the precursor solution of the copylasium titanium ore was 10 seconds for 20 seconds per minute, and at 100 ° C for 5 min in the air.

[0056] Step 9) Weigh 73.2 mg spiro-meotad, completely dissolved in 1 ml of chlorobenzene solvent to dissolve 1 hour after 1 hour, add 17.6 μL of dihydrofluoromethalactonate lithium in acetonitrile, concentration of 520 mg / ml After stirring for 1 hour, it was finally dissolved for 1 hour in the addition of 28.8 μL of 4-tert-butylpyridine.

[0057] Step 10) Spin the hole transporting material of step 9) to the step 7) On the perovskite film, the spin coated spiro-meotad is rotated for 30 seconds per minute, forming a hole transport layer, and oxidized in the air. 24h.

[0058] Supplementary description:

[0059] The transition can be achieved at room temperature, and there is no need for an annealing temperature of 150 ° C or higher. Such as figure 1 Indicated.

[0060] With the increase of solution reaction time, black phase FAPBI 3 The XRD peak of the perovskite is gradually enhanced, such as figure 2 Indicated. The RD peak intensity was the strongest after 36 hours.

[0061] In addition, the reaction after the reaction is thermally coated with the film directly into the black phase FAPBI. 3 Perovanium ore, such as image 3 Indicated. image 3 The film gradually turned from transparent color as a black calcium ore.

[0062] Step 11) Vacuum vapor deposition technology, 5 nm MoO is evaporated on the hole transport layer of step 10) 3 Then, the 100 nm metal electrode Ag is plated to obtain a perovskite solar cell, and the device structure is obtained. Image 6 Indicated.

[0063] Step 12) Under Standard Test Condition (AM1.5G), the energy conversion efficiency of the battery device prepared by this example is 19.49, the open circuit voltage is 1.127V, and the short circuit current is 22.33 mA / cm. 2 The filler factor is 77.47%. Such as Figure 7 Indicated.

Example Embodiment

[0064] Example 2

[0065] In this example, the ionic liquid acetate (MAAc) of the present invention is a solvent in the air in low temperature in the air. 3 Inverted plane heterogeneous cooled titanium mine solar cells to facilitate the appreciation of the present invention. It mainly includes the following steps:

[0066] Step 1) Weigh 281.6 mg of iodide, 81.5 mg of iodide, and dissolve the two in 1 mL of MAAC solvent.

[0067] Step 2) Configure step 1) The precursor solution is reacted at 90 ° C for 36 h, temperature and time control accurate.

[0068] Step 3) Clean the ITO conductive glass, sequentially is ethanol, ultrapure water to add cleaning agent, super pure water, acetone, and ethanol. It is blown with nitrogen to give a clean conductive glass substrate.

[0069] Step 4) Wash step 2) to clean the clean ITO substrate UV ozone treatment for 15 minutes.

[0070] Step 5) Take NiOx 10 mg to completely disperse in 1 ml ultrapure water.

[0071] Step 6) Take the configuration NiOx 45 μL to step 4) to process the good ITO substrate, use a spin coater to rotate into a film, rotation speed is 3000 per minute for 30 seconds, spin coated with NiOx's ITO 150 ° C for 15 min .

[0072] Step 7) The ITO conductive substrate which is annealed in step 6) is placed on the thermoelectric device, preheating for 5 min.

[0073] Step 8) Take step 2) The preheated ITO substrate is dried to step 7 by step 2) The preheated ITO substrate, and the film is copied, and then annealed to form a perovskite film. The rotational speed of the precursor solution of the copylasium titanium ore was 10 seconds for 20 seconds per minute, and at 100 ° C for 5 min in the air.

[0074] Step 9) We were quoted for 20 mg of PCBM, completely dissolved in 1 ml of chlorobenzene solvent and stirred after 24 hours.

[0075] Step 10) Spin the electron transport material of step 9) to the step 7) On the perovskite film, the spin coating PCBM was rotated for 30 seconds per minute to form an electron transport layer, and annealed at 100 ° C for 5 min.

[0076] Step 11) A 5 nm LIF was evaporated on the electron transport layer of step 10), and then 100 nm metal electrodes Ag were alternated to this to obtain a perovskite solar cell. Device structure Figure 8 Indicated.

[0077] Step 12) Under Standard Test Conditions (AM1.5G), the energy conversion efficiency prepared by the battery device prepared in this example is 17.98 open circuit voltage is 1.124V, and the short circuit current is 21.71 mA / cm. 2 The filler factor is 73.69%. Such as Figure 9 Indicated.

PUM

Property	Measurement	Unit
Thickness	100.0	nm

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

low cost

Method, apparatus and article for microfluidic control via electrowetting, for chemical, biochemical and biological assays and the like

InactiveUS7163612B2low cost

Owner:KECK GRADUATE INST OF APPLIED LIFE SCI

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

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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