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Highly Efficient Light‐Emitting Diode of Graphene Quantum Dots Fabricated from Graphite Intercalation Compounds
Author(s) -
Song Sung Ho,
Jang MinHo,
Chung Jin,
Jin Sung Hawn,
Kim Bo Hyun,
Hur SeungHyun,
Yoo Seunghyup,
Cho YongHoon,
Jeon Seokwoo
Publication year - 2014
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201400184
Subject(s) - materials science , graphene , intercalation (chemistry) , graphite , quantum dot , optoelectronics , diode , light emitting diode , nanotechnology , composite material , inorganic chemistry , chemistry
Graphene quantum dot (GQD) light‐emitting diodes (GQD‐LEDs) are shown to have an electroluminescence exceeding 1000 cd m ‐2 . These devices are possible due to a novel synthesis method to create GQDs with minimal oxidation, guaranteeing high quantum yields via the solvothermal formation of graphite intercalation compounds between graphite powder and sodium potassium tartrate. The GQDs are incorporated into polymeric host layers in a multilayer device and irradiate blue (~400 nm) emission.