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P‐218: High‐Efficiency White Organic Light‐Emitting Diodes Using Hybrid‐Spacer
Author(s) -
Seo Ji Hoon,
Seo Ji Hyun,
Kim Young Kwan,
Hyung Gun Woo,
Hwang Jang Hwan,
Shin Dong Myung,
Lee Kum Hee,
Kwon Young Soo,
Yoon Seung Soo,
Kim You Hyun,
Kim Woo Young
Publication year - 2008
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 - 10.1889/1.3069599
Subject(s) - iridium , quantum efficiency , oled , diode , chemistry , green light , materials science , electrical efficiency , blue light , optoelectronics , layer (electronics) , power (physics) , physics , organic chemistry , catalysis , quantum mechanics
The authors have demonstrated high‐efficient white organic light‐emitting diodes (WOLEDs) using three‐emitting materials, 4″‐(2,2‐diphenylvinyl)‐1‐[4‐(N,N‐diphenylamino)‐styryl]‐terphenyl (PVAS‐tPh) as a blue emission, fac‐tris(2‐phenypyridine) iridium(III) (Ir(ppy) 3 ) as a green emission, bis(5‐benzoyl‐2‐phenylpyridinato‐C,N)iridium(III) (acetylacetonate) ((Bzppy) 2 Ir(III)acac) as a red emision. for higher efficiency, hybrid‐spacer (HS) was inserted between each emissive layer (blue‐red, red‐green, and green‐blue emissive layers). It was found that the WOLEDs using HS showed maximum power efficiency of 28.69 lm/W, maximum external quantum efficiency of 13.1%, and Commission Internationale de I'Eclairage (CIE x,y ) coordinates of (x=0.37, y=0.37), respectively.