Novel full inorganic perovskite quantum dot silica gel lens and preparation method thereof

A silica gel lens and quantum dot technology, applied in the field of LED backlight, can solve the problems of reducing the service life of LED light-emitting devices, reducing the quantum efficiency of phosphor powder, and low excitation efficiency of phosphor powder, so as to reduce the influence of heat on quantum dot powder and achieve luminescence The effect of large angle and reduced dosage

Inactive Publication Date: 2017-08-25
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AI-Extracted Technical Summary

Problems solved by technology

[0008] Phosphor powder is directly coated on the chip. Due to the rise of the surface temperature of the chip, the quantum efficiency of the phosphor powder decreases, which accelerates the aging of the phosphor powder and reduces the service life of the LED light-emitting device;
[0009] At present, most of t...
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The invention provides a novel full inorganic perovskite quantum dot silica gel lens and is applied to LED light distribution. The novel full inorganic perovskite quantum dot silica gel lens comprises a lens body, wherein an emission surface of the lens body is in a two-semi-circular or semi-elliptical double-ball butterfly shape, a groove is on the surface, a bottom portion of the lens body is provided with a conic diffusion hole, a lower end of the conic diffusion hole is provided with a support equipped with an LED chip, the lens body is formed through solidification of silica gel fixed with quantum dot powder, and the quantum dot powder is prepared by a full inorganic perovskite material. The invention further provides a preparation method of the novel full inorganic perovskite quantum dot silica gel lens. The novel full inorganic perovskite quantum dot silica gel lens is advantaged in that wider color gamut and high light emission efficiency are realized.

Application Domain

Material nanotechnologySemiconductor devices

Technology Topic

Quantum dotMolecular physics +4


  • Novel full inorganic perovskite quantum dot silica gel lens and preparation method thereof


  • Experimental program(1)

Example Embodiment

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0036] Such as figure 1 As shown, the embodiment of the present invention provides a new type of all-inorganic perovskite quantum dot silica gel lens for LED light distribution, including a lens body 1, the exit surface 2 of the lens body 1 is two semicircular Or a semi-ellipse shaped like a double ball butterfly with a groove on the surface,
[0037] The bottom of the lens body 1 is provided with a tapered diffusion hole 3, and the lower end of the tapered diffusion hole 3 is provided with a holder 6 equipped with an LED chip. The lens body 1 is formed by curing silica gel mixed with quantum dot powder;
[0038] The quantum dot powder is made of all-inorganic perovskite material.
[0039] The lens provided in this embodiment is a refractive optical lens.
[0040] The LED chip is a blue chip or a purple chip, and the excitation wavelength is 380nm-470nm.
[0041] The all-inorganic perovskite material in this embodiment is a ternary compound formed by elements in main group I, main group IV and main group VII, and a core-shell structure formed by coating with other elements or doped There are nano compounds formed by other elements.
[0042] The chemical formula of the quantum dot powder is ABX 3 , Where A is one of Na, K, Rb, Cs, B is one of Si, Ge, Sn, and Pb, and X is one of Cl, Br, and I.
[0043] The lens body 1 contains one, two or more kinds of quantum dot powder.
[0044] Wherein, the lens body 1 is also mixed with at least one phosphor, and the phosphor includes YAG powder, silicate, nitride phosphor, KSF phosphor, and β-SiAlON.
[0045] The present invention provides a novel all-inorganic perovskite quantum dot silica gel lens preparation process, which includes the following steps:
[0046] S1: Dissolve 4-20 parts by mass of quantum dot powder in an appropriate 2-200 parts by mass organic solvent to form a quantum dot solvent;
[0047] S2: Add encapsulation glue B to the quantum dot solvent, and bake it in an oven at a temperature of 80° C.-100° C. for 1-10 hours to remove organic solvents;
[0048] S3: Add another encapsulant A to the encapsulant B in which quantum dot powder is dissolved to form a mixed adhesive;
[0049] S4: Inject the mixed glue into the molding mold of the silicone lens, and vacuum until there are no bubbles, and use the hot pressing molding equipment to vacuum the mixed glue into a mold to solidify the quantum dots;
[0050] S5: After cooling and peeling off the mold, a quantum dot silicone lens is obtained.
[0051] The organic solvent is at least one of n-hexane, cyclohexane, n-octane, toluene, dichlorotoluene, dichloromethane, chloroform, and pyridine.
[0052] In this embodiment, the encapsulation glue A and the encapsulation glue B may be one or a combination of two or more of epoxy resins, silicones, and polyurethanes, or single-component epoxy resins and silicones. , At least one of polyurethanes.
[0053] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this manual. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is only limited by the claims and their full scope and equivalents.


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