ABSTRACT
LED devices are a growing field, which is still expanding to reach the state of being an irreplaceable one. Their affordability, compatibility, environmental friendliness, simplicity, and efficiency makes them unique among all other light sources. This chapter discuss the improvement and decrement in the optical performances of the LED by the scattering effect. The methods and techniques used to convert the scattering effect to improve the optical performance are discussed with case studies. Scattering of an optical spectrum, such as photons, plays a role in enhancing, as well as diminishing, the output efficiency of LED devices. Importantly, changing the refractive index, increasing the mean free path of the photons, altering the scattering angles, coupling the scattering effects with localized surface plasmon, and sculpting the scattering effect by patterning are the most crucial factors to enhancing the optical performance of LEDs. The understanding of the scattering effects will lead to fine-tune the optical extraction and efficiency to make them a stand-alone device according to their desired applications.
