A kind of preparation method of lead-free cubr2-based hybrid perovskite thin film and the prepared thin film and application
A perovskite and thin film technology is applied in the field of preparation of lead-free CuBr2-based hybrid perovskite thin films to achieve the effects of reducing pollution, improving stability and good optoelectronic properties
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Embodiment 1
[0025] 1. In this embodiment, a lead-free CuBr 2 The preparation method of base hybrid perovskite film, its steps are as follows:
[0026] (1) According to the reaction measurement ratio of 1:1 with CH 2 BrCH 2 CH 2 NH 2 And HBr as the raw material, ethanol as the solvent, heated and refluxed at 80℃ for 1h, after vacuum distillation, filtration and recrystallization, dried in a vacuum oven at 60℃ overnight to prepare the ammonium salt CH 2 BrCH 2 CH 2 NH 3 Br;
[0027] (2) Take the above 0.438g ammonium salt CH 2 BrCH 2 CH 2 NH 3 Br is the solute, 10 mL of absolute ethanol is the solvent, and CH is prepared by ultrasonic dispersion for 15 minutes 2 BrCH 2 CH 2 NH 3 Br solution;
[0028] (3) With 0.223g CuBr 2 As the solute, 10mL of absolute ethanol as the solvent, and ultrasonic dispersion for 15 minutes to prepare CuBr 2 Solution
[0029] (4) The above CH 2 BrCH 2 CH 2 NH 3 Br solution and CuBr 2 The solution was mixed and heated and refluxed for 1 hour at a temperature of 80℃. After ...
Embodiment 2
[0046] 1. In this embodiment, a lead-free CuBr 2 The preparation method of base hybrid perovskite film, the steps are as follows:
[0047] (1) According to the reaction measurement ratio of 1:1 with CH 2 BrCH 2 NH 2 And HBr as the raw material, ethanol as the solvent, heated and refluxed at 80℃ for 1h, after vacuum distillation, filtration and recrystallization, dried in a vacuum oven at 60℃ overnight to prepare the ammonium salt CH 2 BrCH 2 NH 3 Br;
[0048] (2) Take the above 0.410g ammonium salt CH 2 BrCH 2 NH 3 Br is the solute, 10 mL of absolute ethanol is the solvent, and CH is prepared by ultrasonic dispersion for 15 minutes 2 BrCH 2 NH 3 Br solution;
[0049] (3) With 0.223g CuBr 2 As the solute, 10mL of absolute ethanol as the solvent, and ultrasonic dispersion for 15 minutes to prepare CuBr 2 Solution
[0050] (4) Change the above CH 2 BrCH 2 NH 3 Br solution and CuBr 2 The solution was mixed and heated to reflux for 1 hour at a temperature of 80°C. After removing the solvent...
Embodiment 3
[0067] 1. In this embodiment, a lead-free CuBr 2 The preparation method of the base hybrid perovskite film, the steps are the same as in Example 1, to obtain (CH 2 BrCH 2 CH 2 NH 3 ) 2 CuBr 4 film.
[0068] 2. This embodiment is a lead-free perovskite solar photovoltaic cell, such as figure 1 As shown, from bottom to top, it is the transparent conductive substrate 1, the dense layer 2, the mesoporous layer 3, the photosensitive active layer 4, the hole transport layer 5, and the metal electrode 6, which are perovskite solar cells arranged in an integrated and planar structure. The preparation process of photovoltaic cells is as follows:
[0069] (1) Treatment of transparent conductive substrate 1
[0070] Same as Example One;
[0071] (2) Preparation of dense layer 2
[0072] Dissolve 15mmol of diethanolamine in 50mL of ethylene glycol methyl ether, then add 15mmol of zinc acetate dihydrate and stir for 1~2h to fully dissolve and react to obtain a colorless and transparent ZnO sol; the...
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