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Organic Light‐Emitting Diodes: The Mechanism of Charge Generation in Charge‐Generation Units Composed of p‐Doped Hole‐Transporting Layer/HATCN/n‐Doped Electron‐Transporting Layers (Adv. Funct. Mater. 4/2012)
Author(s) -
Lee Sunghun,
Lee JeongHwan,
Lee JaeHyun,
Kim JangJoo
Publication year - 2012
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201290023
Subject(s) - oled , doping , materials science , diode , optoelectronics , electron , tandem , charge (physics) , layer (electronics) , nanotechnology , physics , quantum mechanics , composite material
A tandem white organic light‐emitting diode (OLED) composed of blue and orange emitting units interconnected by a charge‐generation unit (CGU) in which both electrons and holes are efficiently generated is presented. On page 855 , Jang‐Joo Kim and co‐workers analyze the charge generation mechanism of the CGU composed of p‐doped hole‐transporting layer (HTL)/1,4,5,8,9,11‐hexaazatriphenylene hexacarbonitrile (HATCN)/n‐doped electron‐transporting layer (ETL). The energy level alignment shows that the electron injection at the HATCN/n‐ETL junction limits the charge generation in the CGU.
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