JX Nippon Oil and Energy Corporation 1 article published in JoVE Engineering Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes Soichi Uchida1, Daisuke Takizawa2, Satoru Ikeda1, Hironori Takeuchi3, Suzushi Nishimura1, Hiroyuki Nishide2, Yoshinori Nishikitani2 1Specialty Chemicals & Materials Company, JX Nippon Oil & Energy Corporation, 2Department of Advanced Science and Engineering, Waseda University, 3Central Technical Research Laboratory, JX Nippon Oil & Energy Corporation The authors present a method for fabricating stable white-light-emitting electrochemical cells utilizing emission from exciplexes formed between a blue-emitting fluorene polymer and aromatic amines.