Characterization of interfaces and electrical gradients by means of 3D nr optical imaging.

We will develop a technique that can visualize electrical properties of light emitting diodes (LED) and other photo-electric or photovoltaic devices. These devices typically consist of many layers. It is important to investigate the areas where these layers meet and how the electric field is divided inside the layers, since these electrical properties determines how efficient the device works. By using advanced optical properties combined with an optical microscope we will visualize these layers and the electric field distribution in 3D. From this research, we will learn how an electric field influences the different layers in a LED or other photo-electric or photovoltaic device and how it influences device performance.

Keywords:Second-harmonic microscopy, 3D nonlinear imaging, Multi-layers, LED, Electric field-induced second-harmonic g

Disciplines:Condensed matter physics and nanophysics, Physical chemistry, Analytical chemistry, Macromolecular and materials chemistry