Electret materials and related phenomena continue to receive much interest both from the fundamental and application point of view. Charge storage in insulators is crucial for many applications, involves a wide range of materials and, hence, is a frontier of many scientific domains. The ISE is therefore a unique meeting opportunity for scientists and engineers from all over the world working in the field of electrical engineering, materials science and engineering, condensed matter physics and chemistry, and a chance for communicating about recent advances and research and development efforts in these areas. It also provides a forum for in-depth discussions between the most experienced and established scientists and engineers and young researchers.