The papers included in this issue of ECS Transactions were originally presented in the symposium ¿Physics and Chemistry of Luminescent Materials, including the 4th Symposium on Persistent Phosphors¿, held during the PRiME 2008 joint international meeting of The Electrochemical Society and The Electrochemical Society of Japan, with the technical cosponsorship of the Japan Society of Applied Physics, the Korean Electrochemical Society, the Electrochemistry Division of the Royal Australian Chemical Institute, and the Chinese Society of Electrochemistry. This meeting was held in Honolulu, Hawaii, from October 12 to 17, 2008.