Combinations of cationic underprinting fluids and anionic ink compositions that together achieve improved color quality and image stability in ink-jet printed images. In one aspect, for example, a method of making a photovoltaic semiconductor device having enhanced electromagnetic radiation absorption can include applying a damage removal etch to a semiconductor material to an RMS surface roughness of from about 0. Methods of using the compounds for treating PRMT5-mediated disorders are also described. A method of protecting hair color from ultraviolet radiation includes applying the composition to natural or artificial hair. Another disclosed sensor structure utilizes a textured surface to increase light absorption.