A kind of circularly polarized light-emitting material and its preparation method and application
A technology of luminescent materials and circular polarization, applied in luminescent materials, chemical instruments and methods, nanotechnology for materials and surface science, etc., to achieve mild conditions, low cost, and small environmental impact factors
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Embodiment 1
[0054] A kind of method for preparing circularly polarized luminescent material of the present invention comprises the following steps:
[0055] (1) Add 2g of yellow-green phosphor (Sr 4 al 4 o 25 : Eu, Dy) mixed with 1g L-cysteine, added 3ml ethanol, and mixed again to obtain a mixed solution;
[0056] (2) Mix the mixed solution obtained in step (1) with 35 g of balls, and use wet ball milling method to rotate unidirectionally for 3 hours at a speed of 500 rpm to obtain an inorganic long-lasting phosphor with circularly polarized luminescence.
[0057] Replace L-cysteine with D-cysteine, and use the above conditions to prepare an inorganic long-lasting phosphor with circularly polarized light emission again.
[0058] Use light with a wavelength of 365nm as the excitation wavelength to excite the above two mixed systems, and perform a CPL test. The results are as follows figure 1 As shown, the maximum emission wavelength is 512nm, and the L-type cysteine gets a positiv...
Embodiment 2
[0061] A kind of method for preparing circularly polarized luminescent material of the present invention comprises the following steps:
[0062] (1) 2g blue-green phosphor (Sr 4 al 4 o 25 : Eu, Dy) mixed with 1g L-cysteine, added 3ml ethanol, and mixed again to obtain a mixed solution;
[0063] (2) Mix the mixed solution obtained in step (1) with 35 g of balls, and use wet ball milling method to rotate unidirectionally for 3 hours at a speed of 500 rpm to obtain an inorganic long-lasting phosphor with circularly polarized luminescence.
[0064] Replace L-cysteine with D-cysteine, and use the above conditions to prepare an inorganic long-lasting phosphor with circularly polarized light emission again.
[0065] Use light with a wavelength of 360nm as the excitation wavelength to excite the above two mixed systems, and perform a CPL test. The results are as follows figure 2 As shown, the maximum emission wavelength is 487nm, and the L-type cysteine gets a positive CPL si...
Embodiment 3
[0068] A kind of method for preparing circularly polarized luminescent material of the present invention comprises the following steps:
[0069] (1) Add 2g of purple phosphor (CaAl 2 o 4 : Eu, Nd) mixed with 1g L-cysteine, added 3ml ethanol, and mixed again to obtain a mixed solution;
[0070] (2) Mix the mixed solution obtained in step (1) with 35 g of balls, and use wet ball milling method to rotate unidirectionally for 3 hours at a speed of 500 rpm to obtain an inorganic long-lasting phosphor with circularly polarized luminescence.
[0071] Replace L-cysteine with D-cysteine, and use the above conditions to prepare an inorganic long-lasting phosphor with circularly polarized light emission again.
[0072] Use light with a wavelength of 320nm as the excitation wavelength to excite the above two mixed systems, and perform a CPL test. The results are as follows image 3 As shown, the maximum emission wavelength is 440nm, and the L-type cysteine gets a positive CPL signa...
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Abstract
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