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Tandem Organic Light‐Emitting Diode using Hexaazatriphenylene Hexacarbonitrile in the Intermediate Connector
Author(s) -
Liao L. S.,
Slusarek W. K.,
Hatwar T. K.,
Ricks M. L.,
Comfort D. L.
Publication year - 2008
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.200700454
Subject(s) - materials science , oled , tandem , optoelectronics , fabrication , diode , doping , layer (electronics) , thermal stability , voltage , light emitting diode , nanotechnology , composite material , chemical engineering , electrical engineering , medicine , alternative medicine , pathology , engineering
Tandem organic light‐emitting diodes (OLEDs) with an organic–organic intermediate connector , consisting of an n ‐type doped electron‐transporting layer (e.g. Li‐doped Alq as shown in the figure) and nondoped hexaazatriphenylene hexacarbonitrile (HAT‐CN), exhibit reduced drive voltage, improved voltage stability, and improved power efficiency. Moreover, this intermediate connector can be formed by thermal evaporation at temperatures lower than 300 °C, which simplifies the fabrication process of the OLEDs.