Method for preparing lead-free double perovskite film by adopting printing method and application
A lead-free double perovskite, double perovskite technology, applied in the direction of final product manufacturing, sustainable manufacturing/processing, photovoltaic power generation, etc., can solve the problems of long time required and long preparation process time, and achieve simple equipment. , the preparation method is simple
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Embodiment 1
[0042] A lead-free double perovskite film composed of Cs 2 AgBr 6 (i.e. M'=Ag, M "'=Bi), the thickness of the film is 20-30 μm, the surface of the film is uniform, and it is prepared by printing method, such as figure 2 As shown, the preparation method specifically includes the following steps:
[0043] (a) Take 0.851g CsBr, 0.375g AgBr and 0.897g BiBr 3 Grind and mix in a mortar to make CsBr, AgBr and BiBr 3 The molar ratio is 2:1:1;
[0044] (b) Add 200 μL DMSO (as an organic solvent) to the mortar for grinding, and add 150 μL α-terpineol (as a binder) during the grinding process to obtain a precursor solution;
[0045] (c) Take 100 μL of the precursor solution obtained in step (b) and place it on a screen printing plate with a mesh number of 300, and scrape the precursor solution onto the FTO conductive glass with a scraper at a pressure of 8 MPa. 10 times, and then place the FTO conductive glass printed with the precursor solution on a heating plate at 250°C for anne...
Embodiment 2
[0048] A lead-free double perovskite film composed of Cs 2 AgBr 6 (i.e. M'=Ag, M "'=Bi), prepared by printing method, except that the annealing time is 15min in the preparation method, all the other are the same as Example 1. The prepared Cs 2 AgBr 6 The XRD pattern of the film is as follows image 3 As shown, it can be seen that the diffraction peaks at 27.9°, 32.2°, and 57.08° respectively correspond to Cs 2 AgBr 6 (222), (400) and (444) crystal planes, and the intensity of the diffraction peaks at 27.9° and 57.08° is strong, indicating that the composition of the prepared film is indeed Cs 2 AgBr 6 .
Embodiment 3
[0050] A lead-free double perovskite film composed of Cs 2 AgBr 6 (i.e. M'=Ag, M "'=Bi), prepared by printing method, except that the annealing temperature is 300°C in the preparation method, all the other are the same as in Example 1. The prepared Cs 2 AgBr 6 The XRD pattern of the film is as follows image 3 As shown, it can be seen that the diffraction peaks at 27.9° and 57.08° respectively correspond to Cs 2 AgBr 6 (222) and (444) crystal planes, and the intensity of the diffraction peaks at 27.9° and 57.08° is strong, indicating that the composition of the prepared film is indeed Cs 2 AgBr 6 .
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