@inproceedings{8927a72efe614fcd99fd61b4cf969443,
title = "A numerical analysis of a high-index nano-composite encapsulant and a roughened surface",
abstract = "The two dimensional Finite-Difference-Time-Domain (FDTD) algorithm is used to study the optical behavior of nano-composite encapsulants. As the size of the nano-particles in an encapsulant decreases, the scattering from particles also decreases and the nano-mixture eventually becomes an optically uniform medium. Calculations of FDTD reveal the size limit of nano-particles when the transition from scatterers to an optically uniform medium occurs. As the size of the nano-particles is reduced to 0.02 λ, scattering substantially disappears and the transmission efficiency improves two-fold compared to that without nano-particles. The numerical results show that the use of a nano-composite encapsulant can improve the extraction efficiency of high-brightness light-emitting-diodes (LEDs). In addition, we simulated the roughened surface of a high-index resin layer using FDTD. The transmission efficiency of roughened surface increases 37% compared to that of the flat surface. Therefore, the combination of high-index nano-composites and a roughened surface can increase the extraction efficiency of the LEDs.",
keywords = "FDTD, Light-emitting diodes, Nano-particles, Scattering",
author = "Ju, {Young Gu} and Kim, {Tae Hoon}",
year = "2006",
doi = "10.1117/12.687783",
language = "English",
isbn = "0819464503",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Advanced LEDs for Solid State Lighting",
note = "Advanced LEDs for Solid State Lighting ; Conference date: 05-09-2006 Through 07-09-2006",
}