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Preparation method of TiO2 electron transport layer for perovskite solar cells

A technology of solar cells and electron transport layers, which is applied in semiconductor/solid-state device manufacturing, circuits, photovoltaic power generation, etc., can solve the problems of high preparation temperature, difficulty in depositing large-area continuous coatings, and uneven coatings. Achieve the effect of lowering the preparation temperature

Inactive Publication Date: 2019-07-09
涂益民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a perovskite solar cell TiO 2 The preparation method of the electron transport layer solves the problem of TiO in perovskite solar cells 2 The preparation method of the electron transport layer, the technical problems of uneven coating and difficulty in depositing a large-area continuous coating, and high preparation temperature

Method used

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  • Preparation method of TiO2 electron transport layer for perovskite solar cells
  • Preparation method of TiO2 electron transport layer for perovskite solar cells

Examples

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Embodiment 1

[0028] The above TiO 2 The preparation method of electron transport layer comprises the following steps:

[0029] S1. Take 60g of TiO with an average particle size ≤ 100nm 2 , 15g of TiO with an average particle size ≤ 25um 2 ,spare;

[0030] S2. TiO with an average particle diameter≤100nm in step S1 2 Place in 100mL distilled water, ultrasonically disperse evenly;

[0031] S3. Nano-TiO in step S2 2 Add the aqueous solution into the reactor equipped with a stirring device and a heating device. At a stirring rate of 300r / min, first slowly add 5g of sodium tripolyphosphate into the reactor, and after fully dissolving, slowly add the average TiO with a particle size of ≤25um 2 Add it into the reactor, stir at 300r / min for 2h, then evaporate the solvent at a temperature of 110°C and a stirring rate of 180r / min;

[0032] S4. the uniformly dispersed TiO in step S3 2 Particles are slowly added to 25g PDADMAC, and after uniform dispersion, TiO 2 coating;

[0033] S5. first a...

Embodiment 2

[0036] S1. Take 50g of TiO with an average particle size ≤ 100nm 2 , 25g of TiO with an average particle size ≤ 25um 2 ,spare;

[0037] S2. TiO with an average particle diameter≤100nm in step S1 2 Place in 100mL distilled water, ultrasonically disperse evenly;

[0038] S3. Nano-TiO in step S2 2 Add the aqueous solution into the reactor equipped with a stirring device and a heating device. At a stirring rate of 500r / min, first slowly add 8g of sodium tripolyphosphate into the reactor, and after fully dissolving, slowly add the average TiO with a particle size of ≤25um 2 Add it into the reactor, stir at 500r / min for 2h, then evaporate the solvent at a temperature of 120°C and a stirring rate of 240r / min;

[0039] S4. the uniformly dispersed TiO in step S3 2 Particles are slowly added to 25g PDADMAC, and after uniform dispersion, TiO 2 coating;

[0040] S5. first adopt the scraping method to coat the TiO in step S4 2 The paint was coated on the FTO electrode layer of the...

Embodiment 3

[0043] S1. Take 70g of TiO with an average particle size ≤ 100nm 2 , 5g of TiO with average particle size ≤ 25um 2 ,spare;

[0044] S2. TiO with an average particle diameter≤100nm in step S1 2 Place in 100mL distilled water, ultrasonically disperse evenly;

[0045] S3. Nano-TiO in step S2 2 The aqueous solution is added to the reactor equipped with a stirring device and a heating device. At a stirring rate of 600r / min, first slowly add 10g of sodium tripolyphosphate into the reactor, and after fully dissolving, slowly add the average TiO with a particle size of ≤25um 2 Add it into the reactor, stir at 600r / min for 2h, then evaporate the solvent at a temperature of 130°C and a stirring rate of 300r / min;

[0046] S4. the uniformly dispersed TiO in step S3 2 Particles are slowly added to 25g PDADMAC, and after uniform dispersion, TiO 2 coating;

[0047] S5. first adopt the scraping method to coat the TiO in step S4 2 The paint was coated on the FTO electrode layer of the...

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Abstract

The invention relates to the technical field of preparation of perovskite solar cells, and discloses a preparation method of a TiO2 electron transport layer for perovskite solar cells. The method comprises the following steps: S1, taking 50-70 parts of nano TiO2 and 5-25 parts of micron TiO2 for use; S2, putting the nano TiO2 in S1 into distilled water and dispersing the nano TiO2 uniformly by ultrasound; S3, adding the TiO2 aqueous solution in S2 and the micron TiO2 into a reactor, dispersing the TiO2 aqueous solution and the micron TiO2 uniformly, and removing the solvent by evaporation; S4,slowing adding the uniformly-dispersed TiO2 particles into 25 parts of PDADMA, and obtaining TiO2 coating after uniform dispersion; and S5, applying the TiO2 coating in S4 to an FTO electrode layer of a perovskite solar cell by scraping, drying the coating under vacuum, and obtaining an TiO2 electron transport layer. The technical problems of even application of a coating layer, difficulty in depositing a large-area continuous coating layer and high preparation temperature in the existing preparation method of a TiO2 electron transport layer for perovskite solar cells are solved.

Description

technical field [0001] The invention relates to the technical field of preparation of perovskite solar cells, in particular to a perovskite solar cell TiO 2 Preparation method of electron transport layer. Background technique [0002] Such as figure 1 As shown, the structure is FTO / TiO 2 / CH 3 NH 3 PB 3 / Spiro-OMeTAD / Au perovskite solar cells are mainly composed of FTO electrode layer 1, TiO 2 Electron transport layer 2, CH 3 NH 3 PB 3 The perovskite absorption layer 3, the Spiro-OMeTAD hole transport layer 4 and the Au electrode layer 5 are composed of five parts. [0003] Such as figure 2 As shown, the structure is FTO / TiO 2 / CH 3 NH 3 PB 3 / Spiro-OMeTAD / Au perovskite solar cells work as follows: when CH 3 NH 3 PB 3 After the perovskite absorbing layer 3 absorbs sunlight and is excited, a pair of free electrons and holes is generated; the free electrons excited to the perovskite conduction band diffuse to CH 3 NH 3 PB 3 Perovskite absorber layer 3 / TiO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/42
CPCH10K71/12H10K30/151Y02E10/549
Inventor 涂益民
Owner 涂益民
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