title: Multifunctional graphene sheets embedded in silicone encapsulant for superior performance of light-emitting diodes.
abstract: Graphene nanosheets with uniform shape are successfully incorporated into a silicone encapsulant of a light-emitting diode (LED) using a solvent-exchange approach which is a facile and straightforward method. The graphene nanosheets embedded in the silicone encapsulant have a multifunctional role which improves the performance of light-emitting diodes. The presence of graphene gives rise to effective heat dissipation, improvement of protection ability from external stimuli, such as moisture and hazardous gas, and enhancement of mechanical properties such as elastic modulus and fracture toughness. Consequently, the LEDs composed of a graphene-embedded silicone encapsulant exhibit long-term stability without loss of luminous efficiency by addition of relatively small amounts of graphene. This novel strategy offers a feasible candidate for their practical or industrial applications.
authors.affiliation: World Class University (WCU) Program of Chemical Convergence for Energy & Environment (C2E2), School of Chemical and Biological Engineering, Seoul National University, 599 Gwanangro, Gwanak-gu, Seoul 151-742, Korea.
authors.forename: Seungae
authors.initials: S
authors.lastname: Lee
authors.forename: Jin-Yong
authors.initials: JY
authors.lastname: Hong
authors.forename: Jyongsik
authors.initials: J
authors.lastname: Jang
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D008027:Light; D008029:Lighting / Q000295:instrumentation*; D008422:Materials Testing; D008567:Membranes, Artificial; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D012666:Semiconductors; D012825:Silicon / Q000737:chemistry*
chemical_list: D008567:Membranes, Artificial; D006108:Graphite; D012825:Silicon