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Multicolor Organic Light‐Emitting Diodes Processed by Hybrid Inkjet Printing
Author(s) -
Chang ShunChi,
Liu Jie,
Bharathan Jayesh,
Yang Yang,
Onohara Jun,
Kido Junji
Publication year - 1999
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(199906)11:9<734::aid-adma734>3.0.co;2-d
Subject(s) - materials science , inkjet printing , oled , dopant , nanotechnology , bilayer , optoelectronics , diode , light emitting diode , layer (electronics) , polymer , inkwell , doping , membrane , composite material , biology , genetics
Inkjet printing (IJP) technology is an attractive alternative for producing OLEDs, due to its low‐cost, large‐area processing, and multicolor addressing capabilities. The problems associated with this technique (pinhole film structure, uneven surfaces) have been overcome by use of the hybrid IJP technique. Here this technique is demonstrated to produce controllable patterning of red‐green‐blue OLEDs. The LEDs comprise bilayer structures of red and green dopants inkjet‐printed onto a film of the blue‐emitting semiconducting polymer poly(9‐vinylcarbazole), the latter serving as the hole‐transport layer.