High-efficiency white-light organic-inorganic hybrid zinc-based two-dimensional perovskite material and preparation thereof
A perovskite material and hybrid zinc technology, which is applied in semiconductor/solid-state device manufacturing, semiconductor devices, electrical components, etc., can solve the problem of low quantum yield of photoluminescence, achieve improved luminescence performance, good stability, The effect of high photoluminescence quantum yield
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[0045] A method for preparing a high-efficiency white-light organic-inorganic hybrid zinc-based two-dimensional perovskite material of the present invention mainly includes the following steps:
[0046] (1) Weigh a certain mass of zinc halide under an inert atmosphere, dissolve it in a volatile polar solvent, stir until the solution is clear, and obtain a premix X;
[0047] (2) dissolving the organic amine containing A in the stoichiometric ratio in the same volatile polar solvent, stirring until the solution is clear, and obtaining the premix Y;
[0048] (3) Mix the premix solution X with the premix solution Y, then add the corresponding molar volume of hydrohalic acid dropwise, stir until the solution is clear, and obtain the premix solution Z;
[0049] (4) Seal the premix Z obtained in step (3) with a sealing film, poke some small holes to control the volatilization rate of the solvent, place it at room temperature and slowly evaporate for several days, and colorless non-le...
Embodiment 1
[0058] 1mmol zinc chloride (ZnCl 2 ) and 2mmol phenethylamine (C 6 h 5 C 2 h 4 NH 2 ) was dissolved in 2ml of methanol, and the two premixes were evenly mixed, then 160 μl of hydrochloric acid was added, and vigorously stirred at room temperature for 4 hours at a speed of 800-1000 rpm / min to obtain a clear and transparent solution. The solution was sealed with a sealing film with several small holes, and left to evaporate slowly at room temperature for several days, and colorless crystals precipitated at the bottom of the container. The obtained crystals were washed three times with isopropanol, and dried in a vacuum oven at 60°C for one day to obtain the organic-inorganic hybrid zinc-based two-dimensional perovskite material PEA 2 ZnCl 4 . The obtained organic-inorganic hybrid zinc-based two-dimensional perovskite material has a quantum yield of 2.9%, a fluorescence lifetime of 3.19ns, a luminescent center at 521nm, and a half-peak width of 175nm.
Embodiment 2
[0060] 1mmol zinc chloride (ZnCl 2 ) and 2mmol phenethylamine (C 6 h 5 C 2 h 4 NH 2 ) was dissolved in 2ml of methanol, and the two premixed solutions were evenly mixed, then a mixed acid solution containing 150 μl of hydrochloric acid and 5 μl of hydrofluoric acid was added, and vigorously stirred at room temperature for 4 hours at a speed of 800-1000 rpm / min to obtain a clear and transparent solution . The solution was sealed with a sealing film with several small holes, and left to evaporate slowly at room temperature for several days, and colorless crystals precipitated at the bottom of the container. The obtained crystals were washed three times with isopropanol, and dried in a vacuum oven at 60°C for one day to obtain the organic-inorganic hybrid zinc-based two-dimensional perovskite material PEA 2 Zn(F x Cl 1-x ) 4 (x=1 / 16). The obtained organic-inorganic hybrid zinc-based two-dimensional perovskite material has a quantum yield of 7.5%, a fluorescence lifetime...
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