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P‐120: Inkjet‐Printable Composite Electrode and Device Architectures for the Inverted Phosphorescent OLED
Author(s) -
Yoon Dai Gun,
Jo Sung Min,
Chin Byung Doo
Publication year - 2012
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/j.2168-0159.2012.tb06099.x
Subject(s) - materials science , oled , electrode , pedot:pss , composite number , layer (electronics) , optoelectronics , phosphorescence , diode , composite material , optics , chemistry , physics , fluorescence
Composite electrode with fine line metallic grid was fabricated by ink‐jet printing process. By the adjustment of the pitch of grid pattern, condition of 90–95% aperture ratio was applied for the production of semi‐transparent electrode comparable with ITO. We have prepared the optimum composite electrode structure with metal grid/semi‐conducting layer (such as poly(3,4‐ethylene dioxythiophene): poly(styrenesulfonate) ‐ PEDOT:PSS) for the normal and inverted organic light emitting diode (OLED). Luminous efficiency of 19.3 cd/A was obtained for green phosphorescent device, while the general performance of reference device on ITO are 20–23 cd/A. Inverted bottom and top emission OLEDs utilizing the metal grid composite electrodes were optimized, aiming for the adaptation on the flexible device architecture.