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Preparation method and application of novel non-lead-based perovskite film
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A perovskite and thin film technology, applied in the field of solar cells, can solve the problems of low film quality of the absorbing layer, achieve the effects of improving film quality, optimizing annealing temperature, and reducing pollution
Active Publication Date: 2021-07-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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The non-lead-based perovskite film adopts the evaporation method, and selects a material with weak photosensitivity as the evaporation source, which solves the problem of low quality of the absorbing layer film of the perovskite solar cell prepared by the existing solution method. At the same time, the preparation process Simple
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Embodiment 1
[0033] A preparation method for a novel non-lead-based perovskite film, comprising the following steps:
[0034] Step 1. In the glove box, weigh 1g AgCl and 1g BiI with an electronic balance 3 , and placed in their respective crucibles, respectively placed in the evaporation furnace, and then placed the substrate;
[0035] Step 2. Close the evaporation chamber door, turn on the mechanical pump and the molecular pump in turn, and vacuum the evaporation chamber to 10 -4 Pa high vacuum environment;
[0036] Step 3. Turn on the evaporation power supply corresponding to AgCl, adjust the evaporation temperature so that the evaporation rate is When the deposition reaches 70nm, turn off the evaporation power supply, stop AgCl deposition, and keep the substrate rotating during the deposition process;
[0037] Step 4. Open BiI 3 The corresponding evaporation power supply, adjust the evaporation temperature so that the evaporation rate is When the deposition reaches 139nm, turn off ...
Embodiment 2
[0041] A preparation method for a novel perovskite solar cell, comprising the following steps:
[0042] Step 1. Select FTO conductive glass as the substrate, use acetone, ethanol, and deionized water as solvents for ultrasonic treatment in turn, dry the ITO conductive glass after ultrasonic treatment with nitrogen, and then use oxygenplasma for 12 minutes, further Remove organic matter on the surface of the substrate, while enhancing the bonding force and adhesion on the surface of the substrate material;
[0043] Step 2. Prepare TiO on the surface of FTO conductive glass substrate 2 Electrontransport layer: Weigh tetrabutyl titanate and dissolve it in ethanol to prepare tetrabutyl titanateethanol solution as the preparation of TiO 2 The precursor solution of thin film, the volume percent of tetrabutyl titanate in the precursor solution is 10%, is then deposited on the FTO conductive glass substrate that obtains through step 1 through the homogeneous spin coating method, a...
Embodiment 3
[0054] Prepare Ag according to the steps of Example 1 2 BiI 3 Cl 2 For the new perovskite film, only the annealing temperature in step 5 was adjusted to 100°C, 130°C and 190°C, and the other steps remained unchanged.
[0055] The perovskite thin film that present embodiment prepares carries out XRD analysis, and the result is as follows figure 2 shown.
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Abstract
The invention provides a preparation method of a novel non-lead-based perovskitesolar cell device, and belongs to the field of solar cells. A non-toxic perovskite solar film absorption layer is prepared by adopting a step-by-step vapor deposition mode, a perovskite film is prepared by selecting an AgCl material with relatively weak photosensitivity, and finally the novel Ag2BiI3Cl2 perovskite film absorption layer is successfully prepared for the first time. The problem that the quality of a double-perovskite solar cellabsorption layer film prepared through an existing solution method is too low is effectively solved, the prepared Ag2BiI3Cl2 novel perovskite film is applied to a solar cell device, and the optimal photoelectric conversion efficiency of 0.76% is obtained. Meanwhile, the whole preparation process conforms to the environment-friendly development concept, and industrial development of the perovskite solar cell is facilitated.
Description
technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a preparation method and application of a novel non-lead-based perovskite thin film. Background technique [0002] A solar cell is a device that uses the photovoltaic effect to convert light energy into electrical energy. In 1839, the French experimental physicist Becquerel first discovered the photovoltaic effect in a solution, and then the theory of the photovoltaic effect was further developed. In recent years, with the continuous development of new energy fields, the types of solar cells have also been further expanded. Metalhalide perovskites were first used in solar cells in 2009, and have developed rapidly, gradually becoming a hot spot in the field of photovoltaics. [0003] Traditional metalhalide perovskite solar cells are mostly ABX 3 type perovskite as the light absorbing layer material. Among them, the A position is the methylamineion (MA + ),...
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