Inorganic perovskite/polymer composite nanofiber membrane and its preparation method and application
A technology of composite nanofibers and polymers, which is applied in nanotechnology, semiconductor/solid-state device manufacturing, textiles and papermaking, etc., can solve the problems of reducing the efficiency of photogenerated charge carriers, so as to promote photoelectron transmission, improve stability, and prepare The effect of simple process
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Embodiment 1
[0031] The specific preparation process of the inorganic perovskite / polymer composite nanofiber membrane of this embodiment is as follows:
[0032] 0.18 grams of polyacrylonitrile PAN was added to 2 grams of dimethyl sulfoxide DMSO, and a polymer solution was obtained through magnetic stirring;
[0033] Subsequently, 0.09 g of PbBr was simultaneously added to the polymer solution 2 and 0.11 g of CsBr, stirred by magnetic stirring at 80 °C for 6 h to obtain CsPbBr 3 Precursor spinning solution;
[0034] CsPbBr 3 The precursor spinning solution was loaded into the syringe, a high voltage of 18 kV was applied between the spinneret and the receiving device, the distance between the spinneret and the receiving plate was 10 cm, the extrusion rate was 0.1 mL / h, and the spinning ambient temperature was The temperature is 2 ℃, the humidity is 10%, so that the solution is directly deposited on the receiving plate in a disordered state to form an inorganic perovskite / polymer nanofiber...
Embodiment 2
[0042] The specific preparation process of the inorganic perovskite / polymer composite nanofiber membrane of this embodiment is as follows:
[0043] Add 0.08 g of polyurethane PU, 0.07 g of polyvinylpyrrolidone PVP and 0.1 g of polyacrylonitrile PAN into 2 g of dimethylsulfoxide DMSO, and stir magnetically for 2 h at room temperature to obtain a clear solution;
[0044] Subsequently, 0.21 g of PbCl2, 0.27 g of PbBr2 and 0.32 g of CsBr were added to the solution, and the precursor spinning solution of CsPbIBr2 was obtained by magnetic stirring at a temperature of 80 °C for 6 h;
[0045] The precursor spinning solution was loaded into the syringe, a high voltage of 25 kV was applied between the spinneret and the receiving device, the distance between the spinneret and the receiving plate was 15 cm, the extrusion rate was 0.3 mL / h, and the spinning environment The temperature is 10 °C and the humidity is 20%, so that the solution is directly deposited on the receiving plate in a d...
Embodiment 3
[0051] The specific preparation process of the inorganic perovskite / polymer composite nanofiber membrane of this embodiment is as follows:
[0052] 0.1 g of PU, 0.1 g of PVP and 0.1 g of PAN were added to 2 g of DMSO, and stirred magnetically for 2 h at room temperature to obtain a clear solution;
[0053] Then 0.24 g of PbCl was added to the solution 2 , 0.32 g PbBr 2 , 0.8 g PbI 2 and 0.24 g of CsI were stirred at 80 °C for 6 h to obtain CsPbX 3 Precursor spinning solution, X=Cl, Br or I;
[0054] The precursor spinning solution was loaded into the syringe, a high voltage of 30 kV was applied between the spinneret and the receiving device, the distance between the spinneret and the receiving plate was 25 cm, the extrusion rate was 1 mL / h, and the spinning environment was The temperature is 30 °C and the humidity is 30%, so that the solution is directly deposited on the receiving plate in a disordered state, thereby forming CsPbX 3 (X=Cl, Br, or I) Inorganic perovskite / p...
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