Mesoporous perovskite photovoltaic material and preparation method thereof

A photovoltaic material, perovskite technology, applied in photovoltaic power generation, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of obtaining reaction products, product pollution, etc., and achieve high sample purity, low production cost, and increased contact area. Effect

Active Publication Date: 2016-04-20
SUZHOU FULANG OPTICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to form a perovskite precursor solution by configuring additives, it is necessary to suspend the precursor solution on the substrate and form a perovskite light-absorbing layer film by annealing, that is, in the prior art, the reaction product cannot be directly obtained in the solution. The technical problem that the products in the process are susceptible to contamination
[0006] According to the above description, none of the existing technologies for preparing the absorbing layer of perovskite solar cells can increase the light absorption capacity and improve the efficiency of perovskite solar cells by adjusting the microstructure of perovskite materials in a low-temperature solution environment.

Method used

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  • Mesoporous perovskite photovoltaic material and preparation method thereof

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Embodiment 1

[0040] Step 1: Preparation of PbI 2 Nanospheres:

[0041] 0.01molPb(NO 3 ) 2 , dissolved in 200mL cyclohexane, ultrasonically stirred for 20min to obtain emulsion A, dissolved 0.02mol KI in 200mL cyclohexane and ultrasonically stirred for 20min to obtain emulsion B, added solution A to solution B, and kept stirring, During the stirring process, the surfactant polyethylene glycol octylphenyl ether was added dropwise, the temperature of the water bath in the reaction vessel was 40° C., and the reaction time was 80 hours. Stir continuously until the reaction is fully mixed, put the turbid solution into a centrifuge, set the rotation speed at 3000rpm, and take out the lower sediment after 1 hour. The precipitate that is taken out is washed with methanol solution, filtered, and then the precipitate is dried to obtain an average pore size within the range of 30nm in PbI 2 nanospheres.

[0042] Step 2: Preparation of mesoporous CH 3 NH 3 PB 3 Photovoltaic materials:

[0043]...

Embodiment 2

[0046] Step 1: Preparation of PbI 2 Nanospheres:

[0047] 0.02molPb(NO 3 ) 2 , dissolved in 320mL cyclohexane, ultrasonically stirred for 20min to obtain emulsion A, dissolved 0.04mol KI in 300mL cyclohexane and ultrasonically stirred for 20min to obtain emulsion B, added solution A to solution B, and kept stirring, During the stirring process, the surfactant polyethylene glycol octylphenyl ether was added dropwise, the temperature of the water bath in the reaction vessel was 20° C., and the reaction time was 5 hours. Stir continuously until the reaction is fully mixed, put the turbid solution into a centrifuge, set the rotation speed at 3000rpm, and take out the lower sediment after 1 hour. The precipitate that is taken out is washed with methanol solution, filtered, and then the precipitate is dried to obtain an average pore size within the range of 18nm in PbI 2 nanospheres.

[0048] Step 2: Preparation of mesoporous CH 3 NH 3 PB 3 Photovoltaic materials:

[0049] ...

Embodiment 3

[0052] Step 1: Preparation of PbCl 2 +PbBr 2 +PbI 2 Nanospheres:

[0053] 0.03molPb(NO 3 ) 2 , dissolved in 500mL cyclohexane, ultrasonically stirred for 20min to obtain emulsion A, dissolved 0.04molKCl, 0.04molKBr and 0.04molKI in 520mL cyclohexane and ultrasonically stirred for 20min to obtain solution B, and added solution A to solution B , stirring continuously, adding surfactant fatty alcohol polyoxyethylene ether and ethylene glycol octylphenyl ether dropwise during the stirring process, the temperature of the water bath in the reaction vessel was 60° C., and the time was 40 hours. Stir continuously until the reaction is fully mixed, put the turbid solution into a centrifuge, set the rotation speed at 1800rpm, and take out the lower sediment after 1 hour. The precipitate that was taken out was washed with toluene solution, filtered, and then the precipitate was dried to obtain PbCl within the range of average size 30nm 2 +PbBr 2 +PbI 2 nanospheres.

[0054] Step...

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Abstract

The invention discloses a mesoporous perovskite photovoltaic material and a preparation method thereof. The preparation method of the mesoporous perovskite photovoltaic material specifically comprises the following steps: (1) preparing metal halide nanometer microspheres; and (2) preparing a mesoporous perovskite photovoltaic material. The particle size of the metal halide nanometer microspheres can be adjusted through parameters such as reaction temperature. Therefore, by implementing the technical scheme in the embodiment of the invention, the aperture of the mesoporous perovskite material can be adjusted accurately. For a solar cell prepared by using the mesoporous perovskite material as the absorption layer of the perovskite solar cell, mesopores increase the contact area between the absorption layer and the hole transport layer of the solar cell, and therefore, the number of holes transported by the hole transport layer is increased when the solar cell is working, the electron-hole separation rate is increased, the electron-hole recombination rate is effectively reduced, and the photoelectric conversion efficiency is increased.

Description

technical field [0001] The invention relates to the field of photovoltaic materials, in particular to a mesoporous perovskite photovoltaic material and a preparation method. Background technique [0002] As the global energy is increasingly tense, solar energy, as a renewable resource, is one of the important ways to develop new energy. Based on the photovoltaic effect, the development and application of solar cells can directly and effectively convert solar energy into electrical energy for human use. Solar cell materials have been developed for more than 60 years, and there are many types according to the selected materials. Mainly include monocrystalline / polycrystalline silicon, gallium arsenide, cadmium telluride, copper indium gallium selenide, dye sensitization, etc. At present, only monocrystalline / polycrystalline silicon solar cells have been widely used, and other types of solar cells are limited in practical application due to the shortcomings of scarce raw mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K85/30H10K30/152Y02E10/549
Inventor 陈庆曾军堂叶任海陈兵
Owner SUZHOU FULANG OPTICAL MATERIALS CO LTD
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