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Method for preparing high-performance all-inorganic perovskite solar cell based on copper bromide

A technology of solar cells and copper bromide, applied in circuits, electrical components, climate sustainability, etc., can solve problems such as hindering PCE growth, large perovskite grains, poor humidity stability of devices, etc., and achieve carrier Effects of mobility and device stability improvement, device performance change, and device performance stability

Active Publication Date: 2019-05-07
SUZHOU UNIV
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Problems solved by technology

[0003] For the existing commonly used all-inorganic perovskite solar cells, due to the excessive crystallization speed, the perovskite crystal grains are too large, which leads to poor humidity stability of the device in the air. At the same time, the film Many defects in the system also seriously hinder the growth of its PCE

Method used

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  • Method for preparing high-performance all-inorganic perovskite solar cell based on copper bromide
  • Method for preparing high-performance all-inorganic perovskite solar cell based on copper bromide
  • Method for preparing high-performance all-inorganic perovskite solar cell based on copper bromide

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Embodiment 1

[0028] The device structure of the battery is: FTO / TiO 2 / Perovskite / Spiro-OMeTAD / MoO 3 / Ag

[0029] The preparation method of the perovskite precursor solution in this example is as follows: Press CsI:CsBr:PbI 2 :PbBr 2 Weigh the medicine at a ratio of 0.5:1:0.5:1, and add copper bromide powder with a mass ratio of 0 wt%, 0.1 wt%, 0.2 wt%, 0.3 wt%, and 0.4 wt%, and dissolve it in DMSO: In a mixed solvent with a DMF ratio of 1:4, place it on a heating table at 57°C and heat and stir for 1 hour. The solution is orange-red, and it is configured as a precursor solution for later use;

[0030] The preparation process of perovskite solar cells:

[0031] (1) The FTO transparent conductive glass substrate was repeatedly ultrasonically cleaned with deionized water, acetone, and ethanol three times, and then baked for 20 minutes to completely remove the solvent and water; then the treated FTO was treated with ultraviolet light and ozone for 25 minutes, and then Deposit the treated FTO on the...

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Abstract

The invention provides a method for preparing high-performance all-inorganic perovskite solar cell based on copper bromide. The method comprises the following steps of: (1) depositing an electron transport layer TiO2 on a treated FTO substrate; (2) preparing a perovskite precursor solution doped with copper bromide powder; (3) preparing a film on an FTO substrate deposited with the TiO2 by employing the prepared perovskite precursor solution through adoption of the spin coating method, and transferring the substrate after spin coating to a heating platform to perform annealing treatment; (4) employing the spin coating method to prepare a hole transport layer; and (5) employing a thermal evaporation technology to deposit a thin film molybdenum trioxide and a silver electrode on the preparedhole transport layer. The method can effectively improve the carrier mobility and device stability of the device, successfully increases the PCE of the all-inorganic perovskite solar cell from 13.24%to 16.15% which is the highest efficiency of the CsPbBrI2 system all-inorganic perovskite solar cell so far.

Description

Technical field [0001] The invention belongs to the field of photovoltaic devices, and particularly relates to a method for preparing high-performance all-inorganic perovskite solar cells based on copper bromide. Background technique [0002] In recent years, perovskite solar cells have achieved dazzling results in the field of solar cells due to their excellent dielectric properties. Among them, the photoelectric conversion efficiency (PCE) of organic-inorganic hybrid perovskite solar cells has exceeded 23.3%, closely following silicon-based solar cells. Unfortunately, although organic-inorganic hybrid perovskite solar cells have good efficiency, their organic functional groups are prone to decomposition under the induction of light and heat, resulting in poor light and thermal stability. All inorganic perovskite CsPbX 3 System perovskite solar cells have excellent light and thermal stability due to the absence of organic functional groups. However, the PCE of the all-inorgani...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/032H01L31/0224H01L31/18
CPCY02P70/50
Inventor 王照奎廖良生王凯礼
Owner SUZHOU UNIV
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