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Cross‐Linked Alq 3 ‐Containing Polymers with Improved Electroluminescence Efficiency Used for OLEDs
Author(s) -
Du Naiying,
Tian Renyu,
Peng Junbiao,
Mei Qunbo,
Lu Mangeng
Publication year - 2006
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200500811
Subject(s) - electroluminescence , materials science , oled , copolymer , polymer , thermal stability , light emitting diode , carbazole , optoelectronics , luminance , layer (electronics) , diode , photochemistry , nanotechnology , optics , chemistry , composite material , organic chemistry , physics
Summary: Homopolymers and a series of copolymers with tris‐8‐hydroxyquinoline aluminum (Alq 3 ) as the cross‐links are synthesized. All these polymers show improved electroluminescence (EL) efficiency over their previously reported counterparts. Among them, the copolymers containing Alq 3 and carbazole groups show higher EL efficiency than that of the homopolymers. We also demonstrate the feasibility of generating patterns using the homopolymers via photopolymerization. The cross‐linked nature, selectivity of patterning, high thermal stability, and EL efficiency might render these polymers a promising material in fabricating large‐scaled multilayered sub‐pixellation organic light‐emitting diodes (OLEDs).Current–voltage and the electroluminescence–voltage curve of two‐layer devices for the Alq 3 ‐homopolymers and the Alq 3 ‐copolymers (luminance is shown by the symbols without lines).