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Role of Room Temperature Sputtered High Conductive and High Transparent Indium Zinc Oxide Film Contacts on the Performance of Orange, Green, and Blue Organic Light Emitting Diodes
Author(s) -
Gonçalves Gonçalo,
Grasso Valentina,
Barquinha Pedro,
Pereira Luís,
Elamurugu Elangovan,
Brig Mauro,
Martins Rodrigo,
Lambertini Vito,
Fortunato Elvira
Publication year - 2011
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201000149
Subject(s) - materials science , oled , indium tin oxide , optoelectronics , amorphous solid , transparent conducting film , diode , anode , electroluminescence , transmittance , thin film , nanotechnology , layer (electronics) , electrode , chemistry , organic chemistry
The core of this paper concerns the use of an amorphous transparent conductive oxide (a‐TCO), whose performance is on par with the classical indium tin oxide (ITO) films as a transparent contact in organic light emitting diodes (OLEDs). The main advantage of indium zinc oxide (IZO) films relies on their amorphous structure and high mobility that turns them likely to be used with high conductivity and high transmittance even at the infrared region. The mobility of IZO films (47.8 cm 2 · V −1 · s −1 ) surpasses the one exhibited by ITO films (26.4 cm 2 · V −1 · s −1 ), which along with its smoother surface and better current distribution plays an important role on OLEDs performance. Besides their similar turn‐on voltage, the devices using IZO anodes exhibit higher power efficiency than the ITO ones, which is 66, 18, and 62% for orange, green, and blue OLEDs, respectively. These results suggest that IZO can potentially be applied as an anode in full color displays based on OLEDs.