title: A white-light-emitting molecule: frustrated energy transfer between constituent emitting centers.
abstract: White-light-emitting single molecules are promising materials for use in a new generation of displays and light sources because they offer the possibility of simple fabrication with perfect color reproducibility and stability. To realize white-light emission at the molecular scale, thereby eliminating the detrimental concentration- or environment-dependent energy transfer problem in conventional fluorescent or phosphorescent systems, energy transfer between a larger band-gap donor and a smaller band-gap acceptor must be fundamentally blocked. Here, we present the first example of a concentration-independent ultimate white-light-emitting molecule based on excited-state intramolecular proton transfer materials. Our molecule is composed of covalently linked blue- and orange-light-emitting moieties between which energy transfer is entirely frustrated, leading to the production of reproducible, stable white photo- and electroluminescence.
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, ENG 445, Seoul 151-744, Korea.
authors.forename: Sanghyuk
authors.initials: S
authors.lastname: Park
authors.forename: Ji Eon
authors.initials: JE
authors.lastname: Kwon
authors.forename: Se Hun
authors.initials: SH
authors.lastname: Kim
authors.forename: Jangwon
authors.initials: J
authors.lastname: Seo
authors.forename: Kyeongwoon
authors.initials: K
authors.lastname: Chung
authors.forename: Sun-Young
authors.initials: SY
authors.lastname: Park
authors.forename: Du-Jeon
authors.initials: DJ
authors.lastname: Jang
authors.forename: Begoña
authors.initials: B
authors.lastname: Milián Medina
authors.forename: Johannes
authors.initials: J
authors.lastname: Gierschner
authors.forename: Soo Young
authors.initials: SY
authors.lastname: Park