Light emitting device and manufacturing method thereof

The invention provides a light emitting device and a manufacturing method thereof. The light emitting device comprises a light emitting element, a wavelength conversion layer and a light adjusting layer. The light emitting element comprises a first upper surface, a lower surface and a side surface between the first upper surface and the lower surface. The wavelength conversion layer comprises a transparent adhesive, multiple wavelength conversion particles and a second upper surface which covers the first upper surface. The light adjusting layer surrounds the side surface of the light emittingelement and has a first composition or a second composition. The first composition comprises a first adhesive and multiple first diffusion particles which are dispersed in the first adhesive. The weight percentage between the multiple first diffusion particles and the light adjusting layer is not smaller than 20%. The second composition comprises a second adhesive, multiple second diffusion particles which are dispersed