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Solving Efficiency–Stability Tradeoff in Top‐Emitting Organic Light‐Emitting Devices by Employing Periodically Corrugated Metallic Cathode
Author(s) -
Jin Yu,
Feng Jing,
Zhang XuLin,
Bi YanGang,
Bai Yu,
Chen Lu,
Lan Tian,
Liu YueFeng,
Chen QiDai,
Sun HongBo
Publication year - 2012
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.201103397
Subject(s) - cathode , materials science , planar , schematic , optoelectronics , coupling (piping) , cross section (physics) , stability (learning theory) , section (typography) , optics , computer science , composite material , electrical engineering , physics , computer graphics (images) , machine learning , operating system , engineering , quantum mechanics
The introduction of a periodic corrugation into TOLEDs is demonstrated to be effective in relieving the tradeoff between device stability and efficiency, through the cross coupling of the SPPs associated with the Ag cathode and the microcavity modes. The thickness of the Ag cathode for the corrugated TOLEDs was increased from 20 to 45 nm, and both the device lifetime and efficiency are significantly improved. The figure shows a schematic cross section of a red TOLED with periodic microstructure and an operating TOLED with both corrugated and planar area.