Method for preparing cesium-doped mixed perovskite solar cell in air environment
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A technology of solar cells and air environment, applied in the field of solar cells, can solve the problems of unfavorable large-scale production of perovskite solar cells, small operation space, expensive glove box, etc., achieves excellent photoelectric conversion efficiency, smooth surface, and is beneficial to The effect of mass production applications
Pending Publication Date: 2019-11-26
ZHEJIANG ZHENENG TECHN RES INST +2
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[0005] The preparation methods used in the published literature on hybrid perovskite solar cells must strictly control the humidity and oxygen content, and are generally carried out in a glove box with a controlled atmosphere, but the glove box is expensive and has a small operating space, which is not conducive to calcium Mass Production of Titanium Ore Solar Cells
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Embodiment 1
[0032] Example 1: Mixed-cation perovskite solar cells doped with 5% cesium
[0033] 1) The FTO glass was ultrasonically cleaned with alkaline detergent, deionized water, acetone, absolute ethanol and isopropanol for 30 min, and finally dried and treated with UV-ozone.
[0034] 2) Preparation of TiO on FTO glass substrate 2 Dense layer, the precursor solution includes the following components: tetraisopropyl titanate (0.3mol / L), acetylacetone (0.45mol / L), hydrochloric acid (0.09mol / L), water (1.8mol / L), and the solvent is ethanol.
[0035] 3) Absorb the precursor solution, drop it on the cleaned FTO glass substrate, make the solution cover the entire FTO surface, and form a film by spin coating, the spin coating speed is 3000rpm, and the time is 20s. Then sinter at 510 °C for 30 min in a muffle furnace or a hot plate.
[0036] 4) will cover TiO 2 The dense layer of FTO glass soaked in a certain concentration of TiCl 4 In the aqueous solution, keep warm at 70°C for 40 minut...
Embodiment 2
[0046] Example 2: Preparation of a mixed cation perovskite solar cell doped with 5% cesium in a relatively dry environment.
[0047] A mixed cation perovskite solution doped with 5% cesium is configured in a relatively dry air environment (temperature 18-23° C., relative humidity ≤ 30%), and the perovskite thin film is prepared. Concrete steps are consistent with embodiment 1.
Embodiment 3
[0051] Example 3: A mixed cation perovskite solar cell doped with 5% cesium, the evaporation rate of the silver electrode is 1000 angstroms / second, and the evaporation thickness is 1200 angstroms, that is, 1200 angstroms of silver metal is evaporated within two seconds. All the other operations and preparation techniques are the same as in Example 1.
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Abstract
The invention relates to a method for preparing a cesium-doped mixed perovskite solar cell in an air environment. The method comprises the following steps: preparing a TiO2 compact layer on transparent conductive glass, soaking the TiO2 compact layer in a TiCl4 aqueous solution, then taking out the TiO2 compact layer, and washing the TiO2 compact layer with deionized water and ethanol; spin-coating an obtained sample with a layer of TiO2 nanocrystalline slurry to obtain a TiO2 mesoporous layer; and preparing a cesium-doped mixed perovskite solution in the relatively dry air environment, spin-coating the TiO2 mesoporous layer with the cesium-doped mixed perovskite solution, placing the sample on a hot plate for heating after spin coating, cooling the sample to the room temperature to obtaina cesium-doped mixed perovskite light absorption layer, spin-coating the surface of the cesium-doped mixed perovskite light absorption layer with a hole transport layer, evaporating a layer of gold,silver or aluminum electrode on the hole transport layer, and finally preparing the cesium-doped mixed perovskite solar cell. The method has the beneficial effects that a composition formula of the perovskite light absorption layer is provided; and the composition, the structure and the performance of the perovskite light absorption layer can be adjusted by adjusting the relative content of all components.
Description
technical field [0001] The invention belongs to the technical field of solar cells, and relates to a method for preparing a perovskite solar cell, in particular to a method for preparing a cesium-doped organic-inorganic hybrid perovskite solar cell (abbreviated as a perovskite solar cell) in an air environment . Background technique [0002] Under the current situation that fossil fuels are gradually depleted and environmental pollution is becoming more and more serious, the development of clean energy such as solar energy has become an inevitable choice for human society. Perovskite materials have the advantages of strong light absorption ability, large carrier mobility, long carrier diffusion distance, simple preparation method, and adjustable composition. In recent years, perovskite solar cells have attracted widespread attention due to their rapidly increasing photoelectric conversion efficiency. The highest certified efficiency has reached 24.2%, showing the excellent ...
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