Light-emitting element and the manufacturing method thereof
This disclosure discloses a light-emitting element having a light-emitting unit, a transparent layer and a wavelength conversion layer formed on the transparent layer. The transparent layer covers the light-emitting unit. The wavelength conversion layer includes a phosphor layer having a phosphor and a stress release layer without the phosphor.
1 . A light-emitting device, comprising:
a first light-emitting unit configured to emit blue light, and having a top surface, a bottom surface and a side surface between the top surface and the bottom surface;
a second light-emitting unit configured to emit blue light;
an insulating layer arranged between the first light-emitting unit and the second light-emitting unit, and surrounding the side surface;
a first wavelength conversion layer arranged on the top surface of the first light-emitting unit;
a second wavelength conversion layer arranged on the second light-emitting unit, and different from the first wavelength conversion layer;
a light-absorbing layer surrounding the first wavelength conversion layer;
a barrier layer covering and not directly contacting the first wavelength conversion layer and the second wavelength conversion layer, the barrier layer being positioned on the light-absorbing layer and being connected to a topmost surface of the light-absorbing layer; and
a filter layer disposed on the barrier layer and fully covering the first wavelength conversion layer,
wherein the barrier layer and the light-absorbing layer have outermost surfaces which are connected and coplanar with each other, and
wherein the filter layer is on top of the barrier layer, the filter layer being configured to block or absorb unconverted blue light from the first light emitting unit and the second light emitting unit.
2 . The light-emitting device according to claim 1 , wherein the filter layer covers the first wavelength conversion layer and the second wavelength conversion layer at the same time.
3 . The light-emitting device according to claim 1 , wherein the first light-emitting unit and the second light-emitting unit emit lights with the same wavelengths.
4 . The light-emitting device according to claim 1 , wherein the insulating layer is configured to reflect a light emitted from the first light-emitting unit.
5 . The light-emitting device according to claim 1 , further comprising a third light-emitting unit uncovered by wavelength conversion layer.
6 . The light-emitting device according to claim 5 , further comprising a transparent layer covering the third light-emitting unit.
7 . The light-emitting device according to claim 1 , wherein the second wavelength conversion layer surrounded by the light-absorbing layer.
8 . The light-emitting device according to claim 1 , wherein the filter layer is on the light-absorbing layer.
9 . The light-emitting device according to claim 1 , wherein the first wavelength conversion layer comprises a base material and a quantum dot material dispersed in the base material.
10 . The light-emitting device according to claim 1 , wherein the filter layer is configured to block a light emitted from the first light-emitting unit and unconverted by the first wavelength conversion layer.
11 . The light-emitting device according to claim 1 , wherein the filter layer comprises a yellow paint or benzotriazole.
12 . The light-emitting device according to claim 1 , wherein the light-absorbing layer comprise Bismaleimide Triazine Resin or black ink.
13 . The light-emitting device according to claim 1 , wherein the insulating layer comprises resin or titanium oxide.
14 . The light-emitting device according to claim 1 , wherein the insulating layer contacts the side surface of the first light-emitting unit.
15 . The light-emitting device according to claim 6 , wherein the transparent layer comprises epoxy resin.