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Improvement of Electroluminescence Performance of Organic Light‐Emitting Diodes with a Liquid‐Emitting Layer by Introduction of Electrolyte and a Hole‐Blocking Layer
Author(s) -
Hirata Shuzo,
Kubota Korefumi,
Jung Heo Hyo,
Hirata Osamu,
Goushi Kenichi,
Yahiro Masayuki,
Adachi Chihaya
Publication year - 2011
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.201003505
Subject(s) - electroluminescence , materials science , optoelectronics , layer (electronics) , oled , diode , cathode , indium tin oxide , electrolyte , luminance , blocking (statistics) , doping , light emitting diode , electrode , nanotechnology , optics , electrical engineering , computer science , chemistry , physics , computer network , engineering
Organic light‐emitting diodes containing a liquid emitting layer that exhibit improved external electroluminescence quantum efficiency ( Φ EL ) and maximum luminance are presented. Doping the liquid emitting layer with an electrolyte significantly decreases the turn‐on voltage for electroluminescence. Insertion of a TiO 2 hole‐blocking layer between the liquid emitting layer and indium tin oxide cathode improves Φ EL .