Highly reflective metallic thin films for high brightness LEDs

Abstract

Improving light extraction efficiency is vital for ensuring the performance of high brightness light emitting diodes (LEDs). One of the improvement methods is to electrodeposit highly reflective silver thin films on the leadframe surfaces. Due to stricter rules and regulations, less toxic electrolytes have become more favorable in the plating industries. To date, comprehensive study on the key factors for developing highly reflective Ag films has not been widely explored. This thesis aims not only to develop low cyanide WOLED White Organic LED XPS X-ray Photoelectron Spectroscopy Abbreviations xxii XRD X-Ray Diffraction XRF X-Ray Fluorescence 2. To understand the effect of surface morphology, crystal structure, film texture and chemical composition on the optical properties of the plated films. 3. To build up a statistical model to simulate the above correlations for demonstrating the influences of material design, process selection, and surface characteristics on optical properties.