A perovskite metal-nonmetal compound core-shell quantum dot polymer film and its preparation method and application
A core-shell quantum dot, polymer film technology, applied in chemical instruments and methods, measuring devices, nanotechnology for materials and surface science, etc., can solve the problem of insufficient water and oxygen barrier ability, instability, poor stability, etc problem, to achieve the effect of improving methane detection capability, improving stability, and improving stability
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[0053] The preparation method of the perovskite metal nonmetal compound core-shell quantum dot polymer film, the steps are:
[0054] The first step: the CX 1-3 Mix with AX according to the molar ratio 1: (0.1~4), where CX 1-3 Selected from C1X, C2X 2 , C3X 3 At least one of, wherein C1 in C1X is selected from Cu + 、Ag + At least one of the C2X 2 In C2 is selected from Pb 2+ 、Cu 2+ , Sn 2+ , Mn 2+ , Zn 2 + 、Cd 2+ 、 Ge 2+ 、Sr 2+ 、Eu 2+, Yb 2+ At least one of the C3X 3 In C3 is selected from Bi 3+ , Sb 3+ , Tl 3+ 、In 3+ At least one of, X is selected from Cl - , Br - , I - , SCN - At least one of, wherein A is CH 3 NH 3 + , NH 2 CHNH 2 + , C(NH 2 ) 3 + 、Cs + , Li + 、Na + 、K + , Rb + Or at least one of Q; wherein Q is selected from at least one of an aromatic group or an alkyl organic amine cation with a carbon number not less than 3; then add a ligand, CX 1-3 The molar ratio to the ligand is 1: (0.0001~3); then add solvent, CX 1-3 The molar...
Embodiment 1
[0070] A perovskite metal-nonmetal compound core-shell quantum dot polymer thin film prepared by GAPbI 3 @Al 2 o 3 EPDM polymer flexible film, the steps are:
[0071] The first step, the synthesis of perovskite quantum dots: 0.2 mmol GAI and 0.2 mmol PbI 2 And 1 mL of dimethylformamide (DMF) was added to a 5 mL glass bottle, in which GAI was guanidine iodide (CAS number: 19227-70-4, chemical formula: CH 6 N 3 I); Then use a pipette gun to add 20 μL oleylamine and 500 μL oleic acid dropwise to the glass bottle, and then put the glass bottle into a magnetic stirrer for stirring until the solution is clear and transparent to obtain the perovskite precursor solution A; Put the perovskite precursor solution A into a 100 mL beaker and stir it magnetically, then slowly add 80 mL of toluene solution dropwise to it, and add dropwise while stirring. After the dropwise addition, put it into a centrifuge tube, Centrifuge in a centrifuge with a rotating speed of 4000 rpm, remove the ...
Embodiment 2
[0075] A perovskite metal-nonmetal compound core-shell quantum dot polymer thin film prepared from CsPbBr 3 @ZnO PMMA polymer film, the steps are:
[0076] The first step, the synthesis of perovskite quantum dots: 0.2 mmol CsBr and 0.2 mmol PbBr 2 and 1 mL dimethyl sulfoxide (DMSO) into a 5 mL glass bottle; then use a pipette gun to add 20 μL oleylamine and 500 μL oleic acid dropwise to the glass bottle, and then put the glass bottle into a magnetic stirrer for stirring , until the solution is clear and transparent, and obtain the perovskite precursor solution A; put the perovskite precursor solution A into a 100 mL beaker, carry out magnetic stirring, and then slowly add 80 mL of toluene solution dropwise to it, and drop while stirring Add, after the dropwise addition, put it into a centrifuge tube, centrifuge in a centrifuge with a speed of 7000 rpm, remove the precipitate, and disperse it ultrasonically with 10 mL of toluene solution for 30 min; Centrifuge in the medium, ...
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