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Increased Efficiency and Controlled Light Output from a Microstructured Light‐Emitting Diode
Author(s) -
Matterson B. J.,
Lupton J. M.,
Safonov A. F.,
Salt M. G.,
Barnes W. L.,
Samuel I. D. W.
Publication year - 2001
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 - 10.1002/1521-4095(200101)13:2<123::aid-adma123>3.0.co;2-d
Subject(s) - materials science , electroluminescence , optoelectronics , light emitting diode , photoluminescence , wavelength , diode , light scattering , optics , polarization (electrochemistry) , polymer , layer (electronics) , scattering , nanotechnology , composite material , chemistry , physics
The use of Bragg scattering to increase the efficiency and control the spectrum and polarization of light from a polymer light‐emitting diode (LED) is demonstrated. A lateral wavelength‐scale microstructure in the form of a corrugation is integrated into the light‐emitting layer and used to control the lateral modes (those parallel to the light‐emitting layer) of the structure. Both photoluminescence and electroluminescence efficiencies can be enhanced in poly[2‐Methoxy‐5‐(2′‐ethyl‐hexyloxy)‐1,4‐phenylenevinylene] (MEH–PPV) based devices.