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Hydrochloric acid-assisted method for preparing organic and inorganic hybrid perovskite material

A perovskite material and organic technology, applied in the field of preparing high-quality perovskite thin films by one-step spin coating or continuous deposition, can solve the problems of yellowish color, poor crystallinity and low coverage of perovskite films, Achieve the effect of smooth surface, good crystallinity and high coverage

Inactive Publication Date: 2016-01-06
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The perovskite film obtained by this method is yellowish in color, poor in crystallinity, and low in coverage

Method used

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  • Hydrochloric acid-assisted method for preparing organic and inorganic hybrid perovskite material
  • Hydrochloric acid-assisted method for preparing organic and inorganic hybrid perovskite material
  • Hydrochloric acid-assisted method for preparing organic and inorganic hybrid perovskite material

Examples

Experimental program
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Effect test

Embodiment 1

[0042] This embodiment relates to a kind of method that concentrated hydrochloric acid, lead iodide and methylamine iodide are dissolved in DMF and spin-coats perovskite film, and described method comprises the following steps:

[0043] 1) Dissolving 0.461g of lead iodide and 0.159g of methylamine iodide in 1mL of DMF to obtain a perovskite precursor solution;

[0044] 2) Take 80 uL of concentrated hydrochloric acid (the volume fraction of concentrated hydrochloric acid added is 8%) and add it to the perovskite precursor solution obtained in step 1 to form solution A.

[0045] 3) The solution A obtained in step 2) was spin-coated on the FTO substrate at 8000 rpm for 20 s and dried at room temperature to obtain a perovskite film.

[0046] figure 1 It is the X-ray diffraction spectrum of Example 1, from which it can be concluded that the crystal form of the perovskite film obtained in Example 1 is perovskite, and the crystallinity is good; figure 2 It is the ultraviolet-visib...

Embodiment 2

[0050]This embodiment relates to a kind of method that concentrated hydrochloric acid, lead iodide and methylamine iodide are dissolved in DMF and spin-coats perovskite film, and described method comprises the following steps:

[0051] 1) Dissolve 0.461g of lead iodide and 0.159g of methylamine iodide in 1mL of DMF and ultrasonically obtain a perovskite precursor solution;

[0052] 2) Take 40 uL of concentrated hydrochloric acid (the volume fraction of concentrated hydrochloric acid is 4%) and add it dropwise into the perovskite precursor solution obtained in step 1 to form solution A.

[0053] 3) The solution obtained in step 2 was spin-coated onto the FTO substrate at 8000 rpm for 20 s and dried at room temperature to obtain a perovskite film.

[0054] Image 6 It is the X-ray diffraction spectrum of Example 2, from which it can be seen that the crystallinity of the perovskite obtained in Example 2 is better. Figure 7 It is the ultraviolet-visible spectrogram of Example 2...

Embodiment 3

[0056] This embodiment relates to a method in which concentrated hydrochloric acid and lead iodide are dissolved in DMF and a continuous deposition method is used to prepare a perovskite film. The method includes the following steps:

[0057] 1) 0.461g of lead iodide was dissolved in 1mL of DMF and ultrasonically dissolved to obtain a lead iodide solution;

[0058] 2) Take 96uL of concentrated hydrochloric acid (the volume fraction of concentrated hydrochloric acid added is 9.6%) and add dropwise into the lead iodide solution obtained in step 1 to form solution B.

[0059] 3) Spin-coat the solution B obtained in step 2 onto the FTO substrate at 4500 rpm for 20 s.

[0060] 4) Soak the spin-coated FTO substrate obtained in step 3 into a 10 mg / mL isopropanol solution of methylamine iodide MAI for 20 seconds, take it out, blow dry and anneal to obtain a perovskite film.

[0061] Figure 8 It is a scanning electron microscope photo of Example 3. It can be seen from the photo that...

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Abstract

The invention provides a hydrochloric acid-assisted method for preparing an organic and inorganic hybrid perovskite material. The organic and inorganic hybrid perovskite material is prepared through a one-step spin-coating method or a continuous deposition method. The method comprises the following steps: mixing concentrated hydrochloric acid, lead halide PbX2 and corresponding halogenated methylamine MAX at a certain ratio, and then obtaining a high-quality perovskite spin-coating film through spin-coating and annealing; or mixing the concentrated hydrochloric acid with the lead halide PbX2 at the certain ratio and then preparing the high-quality perovskite spin-coating film through spin-coating film formation and soaking growth. By the hydrochloric acid-assisted method, the perovskite film which is good in crystallinity and compact and smooth in surface can be prepared. The preparation method can be carried out at normal temperature, and is convenient to operate, relatively low in cost and good in film-forming property; and large-scale factory production is convenient to achieve.

Description

technical field [0001] The invention relates to a method for preparing an organic-inorganic hybrid perovskite material assisted by hydrochloric acid, in particular to a method for preparing a high-quality perovskite film by a one-step spin coating method or a continuous deposition method. Background technique [0002] In recent years, perovskite solar cells have received more and more attention because of their high absorbance and adjustable band gap. Traditional perovskite materials are mixed with lead iodide and methylammonium iodide Dissolved in DMF or GBL to obtain CH3NH3PbI3 solution, then this solution is placed on the FTO spin-coated annealed to obtain a perovskite layer (Yao Xin, Ding Yanli, Zhang Xiaodan, etc. Perovskite solar cell review [J]. Acta Physica, 2015, (03): 145-152.). The perovskite film obtained by this method is yellowish in color, poor in crystallinity, and low in coverage. Therefore, it is of great practical significance to find new methods for pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/46
CPCH10K71/12H10K30/00H10K2102/00Y02E10/549
Inventor 赵一新钱旭芳李戈张太阳岳东亭阚淼郭男杰
Owner SHANGHAI JIAO TONG UNIV
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