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Doped Quantum Dots for White‐Light‐Emitting Diodes Without Reabsorption of Multiphase Phosphors
Author(s) -
Wang Xiebing,
Yan Xiaosong,
Li Wanwan,
Sun Kang
Publication year - 2012
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.201104861
Subject(s) - phosphor , materials science , color rendering index , stokes shift , quantum dot , optoelectronics , diode , light emitting diode , fluorescence , doping , white light , photon upconversion , wavelength , absorption (acoustics) , color temperature , optics , luminescence , composite material , physics
A white‐light‐emitting diode (white LED) with good color rendering index is fabricated based on a blue LED combined with high‐fluorescence CdS:Cu/ZnS quantum dots (QDs) and YAG:Ce phosphors. The reabsorption problem is overcome by the excellent optical properties and enlarged Stokes shift of the QDs with low absorption of light of wavelengths longer than 470 nm.