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Highly Efficient Green‐Light‐Emitting Diodes Based on CdSe@ZnS Quantum Dots with a Chemical‐Composition Gradient
Author(s) -
Bae Wan Ki,
Kwak Jeonghun,
Park Ji Won,
Char Kookheon,
Lee Changhee,
Lee Seonghoon
Publication year - 2009
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200801908
Subject(s) - quantum dot , diode , light emitting diode , optoelectronics , materials science , composition (language) , nanotechnology , linguistics , philosophy
Highly efficient green‐light‐emitting diodes (LEDs) based on CdSe@ZnS quantum dots (QDs) with a chemical‐composition gradient are demonstrated. Through the moderate control of QD coverage in multilayered devices, excellent device performance has been achieved. The color‐saturated green‐light emission (see figure for Commission Internationale de l'Eclairage (CIE) co‐ordinates) is mainly from the QD layers (more than 99% of total emission).