title: Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes.
abstract: The authors present an approach for fabricating stable white light emission from polymer light-emitting electrochemical cells (PLECs) having an active layer which consists of blue-fluorescent poly(9,9-di-n-dodecylfluorenyl-2,7-diyl) (PFD) and π-conjugated triphenylamine molecules. This white light emission originates from exciplexes formed between PFD and amines in electronically excited states. A device containing PFD, 4,4',4''-tris[2-naphthyl(phenyl)amino]triphenylamine (2-TNATA), Poly(ethylene oxide) and K2CF3SO3 showed white light emission with Commission internationale de l'éclairage (CIE) coordinates of (0.33, 0.43) and a Color Rendering Index (CRI) of Ra = 73 at an applied voltage of 3.5 V. Constant voltage measurements showed that the CIE coordinates of (0.27, 0.37), Ra of 67, and the emission color observed immediately after application of a voltage of 5 V were nearly unchanged and stable after 300 sec.
authors.affiliation: Specialty Chemicals & Materials Company, JX Nippon Oil & Energy Corporation.
authors.forename: Soichi
authors.initials: S
authors.lastname: Uchida
authors.affiliation: Department of Advanced Science and Engineering, Waseda University.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Takizawa
authors.affiliation: Specialty Chemicals & Materials Company, JX Nippon Oil & Energy Corporation.
authors.forename: Satoru
authors.initials: S
authors.lastname: Ikeda
authors.affiliation: Central Technical Research Laboratory, JX Nippon Oil & Energy Corporation.
authors.forename: Hironori
authors.initials: H
authors.lastname: Takeuchi
authors.affiliation: Specialty Chemicals & Materials Company, JX Nippon Oil & Energy Corporation.
authors.forename: Suzushi
authors.initials: S
authors.lastname: Nishimura
authors.affiliation: Department of Advanced Science and Engineering, Waseda University.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Nishide
authors.affiliation: Department of Advanced Science and Engineering, Waseda University; y-nishikitani@aoni.waseda.jp.
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Nishikitani
mesh_terms: D003116:Color; D055664:Electrochemical Techniques; D008027:Light; D011108:Polymers
chemical_list: D011108:Polymers