Quantum dot module packaged by coating technology and its light emitting module

With the development of technology, quantum dots have become the core material of next-generation lighting and display technology due to their continuous illumination, high color purity and high conversion efficiency. The invention patent US 9,577,127 B1 discloses a quantum dot fluorescent microsphere structure. Based on the product and a coating technology, a quantum dot module is developed, and a new lamp is designed by using the module.

The quantum dot module based on the coating technology, as shown in FIG. 1 , comprises a susceptor 1 , a barrier film 2 and a carrier layer 3 mixed with quantum dots, the upper surface of the pedestal is etched with a groove, and the quantum dot carrier layer is disposed in the concave Inside the groove, a barrier film is coated on the side surface and the upper surface of the quantum dot carrier layer. The quantum dot is first encapsulated in the carrier layer, and is completely covered by the pedestal and the barrier film to form a second package. The two packages can effectively prevent the penetration of small molecules such as water and oxygen, and maximize The service life of the quantum dots is guaranteed.

In addition, based on the quantum dot module, the company has developed a quantum dot light emitting module, as shown in FIG. 2, which includes a blue light chip 4, a phosphor layer 5 and the above quantum dot module, and the quantum dot module is covered by the base 1 Above the phosphor layer 5. The susceptor 1 may be made of sapphire, quartz or glass material, and the barrier film 2 may be made of silicon monoxide, silicon dioxide, aluminum oxide or parylene. The barrier film may be spin-coated, vapor-deposited or sputtered. Or a single atomic layer deposition process to form a film, firmly covering the outside of the quantum dot carrier layer, forming a dense protective layer, better blocking water oxygen, effectively improving the stability of the quantum dot material, the quantum dot carrier layer 3 Silicone, PMMA, PC, PVA, EVA, epoxy, polyurethane, photoresist or PVP materials can be used.

The above quantum dot light emitting module adopts a sapphire substrate, a silicon oxide barrier film and a silica carrier layer material respectively, and the silica carrier layer has the characteristics of high refractive index, which can effectively reduce the light loss caused by the interface refraction and improve the light extraction efficiency of the interface. At the same time, the silica gel can be fully mixed with the quantum dot material to prevent water oxygen and protection for the first time. However, due to the hygroscopic nature of the silica gel, combined with the barrier film, each of the carrier layers of the mixed quantum dots is covered to completely isolate the water and oxygen in the outside air, and the SiO material is more dense than the silica material, and can be later The combination of oxygen and oxidation to silica serves the second time to block water oxygen and protect it.