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Light propagation in nanoparticle-loaded encapsulants is simulated based on the method of Monte Carlo,referring to the multilayer graded-refractive-index structure for LED encapsulants.And the influence of scattering coefficient on the transmittance is analyzed.The results show that the transmittance decreases with scattering coefficient.For a given number of layers,the encapsulants will yield maximum transmittance if the refractive index value of each layer is optimized.The nanoparticle-loaded encapsulant consists of multiple layers with refractive-index values that gradually decrease.The transmittance will be higher than that of traditional non-graded encapsulants,and will improve light extraction efficiency of LED.
Light propagation in nanoparticle-loaded encapsulants is simulated based on the method of Monte Carlo, referring to the multilayer graded-refractive-index structure for LED encapsulants. And the influence of scattering coefficient on the transmittance is analyzed. with scattering coefficient. For a given number of layers, the encapsulants will yield maximum transmittance if the refractive index value of each layer is optimized. The nanoparticle-loaded encapsulant consists of multiple layers with refractive-index values that will gradually decrease. The transmittance will be higher than that of traditional non-graded encapsulants, and will improve light extraction efficiency of LED.