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Highly Efficient Light‐Emitting Diodes Based on an Organic‐Soluble Poly( p ‐phenylenevinylene) Derivative Carrying the Electron‐Transporting PBD Moiety
Author(s) -
Chung SungJae,
Kwon KiYoung,
Lee SeungWuk,
Jin JungIl,
Lee Chang Hoon,
Lee Cheol Eui,
Park Yongsup
Publication year - 1998
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/(sici)1521-4095(199810)10:14<1112::aid-adma1112>3.0.co;2-p
Subject(s) - electroluminescence , materials science , moiety , oled , oxadiazole , diode , biphenyl , fabrication , light emitting diode , polymer , photochemistry , optoelectronics , electron , polymer chemistry , nanotechnology , organic chemistry , composite material , chemistry , medicine , alternative medicine , physics , layer (electronics) , pathology , quantum mechanics
Balanced charge injection and mobility are required for efficient electroluminescence (EL) in light‐emitting diodes (LEDs). Here a novel approach towards this end is described—the direct attachment of the electron transporting material 2‐(4‐biphenyl)‐5‐(4‐ t ‐butylphenyl)‐1,3,4‐oxadiazole (PBD) to the backbone of poly( p ‐phenylenevinylene) (PPV). The fabrication and performance efficiency of devices based on this polymer are reported. It is found that the EL efficiency is improved to a remarkable extent, which is ascribed to a more facile electron injection and an enhancement of the electron transporting properties of the polymer.