Organic semiconductors are generally used as thin films (less than a 1000th of thickness of a human hair). How the organic semiconductors are arranged in the film strongly governs how a particular device will work. In addition, many semiconductor devices have the active layers comprised of more than one material. When blends are used, how the components are distributed within the film is key to their performance. COPE applies a wide range of X-ray and neutron scattering techniques to probe film morphology.