期刊
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
卷 22, 期 2, 页码 25-28出版社
IOP PUBLISHING LTD
DOI: 10.1088/0268-1242/22/2/005
关键词
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Multilayer phosphorescent organic light-emitting diodes with bright yellow light emission based on novel bis[2-(4-tert-butylphenyl) benzothiazolato-N, C-2'] iridium (acetylacetonate) [(t-bt)(2)Ir(acac)] were fabricated. The device structure is ITO/CuPc (15 nm)/NPB (15 nm)/CBP: (t-bt)(2)Ir(acac) (5 wt%, 30 nm)/BCP (20 nm)/Alq (20 nm)/LiF (1nm)/Al (100 nm). Electroluminescent (EL) spectra of the device have a main peak at 560 nm with a shoulder at 596 nm ascribed to (t-bt)(2)Ir(acac) phosphor and a weak peak from the NPB layer. A maximum luminance of 10 500 cd m(-2) at a driving voltage of 12.5 V and current density of 188 mA cm(-2) and a maximum external quantum efficiency of 6.1% at 4.2 V were achieved.
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