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Preparation of Highly Luminescent Nanocrystals and Their Application to Light‐Emitting Diodes
Author(s) -
Lim J.,
Jun S.,
Jang E.,
Baik H.,
Kim H.,
Cho J.
Publication year - 2007
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.200602642
Subject(s) - nanocrystal , phosphor , materials science , diode , optoelectronics , luminescence , light emitting diode , wavelength , quantum efficiency , core (optical fiber) , semiconductor , excitation wavelength , nanotechnology , composite material
Core/multishell‐structured semiconductor nanocrystals (NCs) are prepared in multigram amounts through a one‐pot process without a core‐separation step (see figure and cover). The NCs show a maximum quantum efficiency of 85 % at a controlled wavelength and strong photostability against UV‐light bleaching. The NCs are applied as phosphors on UV‐light‐emitting diodes (390 nm source), which emit light at 620 nm with a 48 % power conversion efficiency.