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Perovskite solar cell and preparation method thereof

A perovskite structure, solar cell technology, applied in the field of solar cells, can solve the problems of high open circuit voltage, long diffusion length, difficult to reach, etc., and achieve the effects of strong light absorption, low energy consumption, and simple preparation conditions

Pending Publication Date: 2019-09-20
QINGHAI HUANGHE HYDROPOWER DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(4) Large diffusion length
[0010] The existing perovskite structure prototype battery is affected by the preparation method and its structure, the photoelectric conversion efficiency is generally 3.8%, and it is difficult to reach more than 8-10%

Method used

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  • Perovskite solar cell and preparation method thereof
  • Perovskite solar cell and preparation method thereof
  • Perovskite solar cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A preparation method of a one-step perovskite structure solar cell:

[0049] (1) Etching the FTO substrate: Cut the FTO glass to 25mm×30mm, then use adhesive tape to protect the middle 10mm×30mm area as an electrode, and etch the other areas with hydrochloric acid dipped in zinc powder until the etched area become transparent;

[0050] (2) Cleaning the FTO substrate: Remove the protective tape from the etched FTO substrate, and use a surfactant to perform preliminary scrubbing to remove surface impurities, and then put the FTO substrate in turn, with 10% volume concentration of Decon-90 Cleaning agent, deionized water, acetone, alcohol, and deionized water are ultrasonically cleaned for 15 minutes in sequence;

[0051] (3) spin-coated TiO 2 Barrier layer: Dry the cleaned FTO substrate with a nitrogen gun, send it into the pretreatment chamber, adjust the chamber pressure to 60Pa with a flow rate of 30sccm below 3Pa, and then start the power supply to generate O 2 Pla...

Embodiment 2

[0085] A preparation method of a two-step perovskite structure solar cell:

[0086] (1) Etching the FTO substrate: The FTO glass used in this experiment was cut to a size of 25mm*30mm, and then the middle 10mm*30mm area was protected with adhesive tape as an electrode, and the other areas were dipped in hydrochloric acid with zinc powder Etching is performed until the etched area becomes transparent;

[0087] (2) Cleaning the FTO substrate: Remove the protective tape from the etched FTO substrate, and use a surfactant to perform preliminary scrubbing to remove surface impurities, and then put the FTO substrate in turn, with 10% volume fraction of Decon-90 Cleaning agent, deionized water, acetone, alcohol, and deionized water are ultrasonically cleaned for 15 minutes in sequence;

[0088] (3) spin-coated TiO 2 Barrier layer: Dry the cleaned FTO substrate with a nitrogen gun, send it into the pretreatment chamber, adjust the chamber pressure to 60Pa with a flow rate of 30sccm ...

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Abstract

The invention discloses a perovskite solar cell and a preparation method thereof. The perovskite solar cell successively comprises an FTO substrate, a TiO2 electron transport layer, a CH3NH3PbI3-xClx perovskite light absorbing layer, a Spiro-MeOTAD hole transport layer, and an Ag electrode, wherein X is 0 to 3. The preparation method comprises the steps of etching and cleaning the FTO substrate; spin-coating a TiO2 barrier layer; performing a surface treatment; forming perovskite on the substrate by a one-step or two-step method; spin-coating Spiro-MeOTAD; and performign Ag evaporation. The perovskite solar cell prepared by the method has a simple preparation condition, a good light absorption capability, low energy consumption, high photoelectric conversion efficiency and the like.

Description

technical field [0001] The invention relates to a perovskite structure solar cell, which belongs to the technical field of solar cells. Background technique [0002] The general formula of the perovskite structure can be ABX 3 To represent, generally cubic or octahedral structure. In the perovskite crystal, the A ion is located in the center of the cubic unit cell and is surrounded by 12 X ions to form a coordination cube octahedron with a coordination number of 12; the B ion is located at the corner of the cubic unit cell and is surrounded by 6 X ions. It is surrounded by a coordination octahedron with a coordination number of 6, as shown in the figure. Among them, A ions and X ions have similar radii and together form a cubic close packing (a is an octahedron, b is a cube-octahedron). [0003] The stability of perovskite crystals and the possible structures are mainly determined by the tolerance factor (t) and the octahedral factor (μ). in RA, RB, and RX refer to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/48
CPCH10K30/151Y02E10/549
Inventor 杜娟张万辉侯雯文
Owner QINGHAI HUANGHE HYDROPOWER DEV